常用代码笔记－持续更新"/>
常用代码笔记－持续更新
一，蛇型排n格图精灵
//LatticeImage
-(void)LatticeImage:(NSArray *)imageArray_ firstImagePoint:(CGPoint) firstImagePoint_ ColumnStep:(float)ColumnStep_ LineStep:(float)linestep_{for(int i=0; i<imageArray_.count;i++) {NSString* image=[imageArray_ objectAtIndex:i];CCSprite* sprite=[CCSprite spriteWithFile:image];int offsetCloum = i%4;int offsethLine = i/4;sprite.position = ccp(firstImagePoint_.x+ColumnStep_*offsetCloum,firstImagePoint_.y-linestep_*offsethLine);[self addChild:sprite];}}
调用：imageArray=[NSArray arrayWithObjects:@"Icon.png",@"Icon.png",@"Icon.png",@"Icon.png", @"Icon.png", @"Icon.png", @"Icon.png", @"Icon.png", @"Icon.png", @"Icon.png", @"Icon.png", @"Icon.png", nil];[self LatticeImage:imageArray firstImagePoint:CGPointMake(360, 680) ColumnStep:180 LineStep:120];二，数组保存CGpointzhuang_point=ccp(160,246);xian_point=ccp(160,246-56);xiandui_point=ccp(50,304);he_point=ccp(160,304);zhuangdui_point=ccp(266,304);//数组存postNSValue *zhuang_point_va = [NSValue valueWithCGPoint:zhuang_point];NSValue *xian_point_va = [NSValue valueWithCGPoint:xian_point];NSValue *xiandui_point_va = [NSValue valueWithCGPoint:xiandui_point];NSValue *he_point_va = [NSValue valueWithCGPoint:he_point];NSValue *zhuangdui_point_va = [NSValue valueWithCGPoint:zhuangdui_point];mpd =[[MyPostionData alloc]init];rect_postion = [NSArray arrayWithObjects:zhuang_point_va,xian_point_va,xiandui_point_va, he_point_va,zhuangdui_point_va,nil];// __block void (^blocks)(int);
//
// blocks = ^(int i){
// if(i > 0){
//
// blocks(i - 1);
//
// }
// };
// blocks(3); 两点差值：ccpDistance(<#const CGPoint v1#>, <#const CGPoint v2#>)双击
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{UITouch *touch = [[event allTouches] anyObject];if ([touch tapCount]==2) {NSLog(@"双击");}
}改变badgeValue
改变其他viewcontroller 的tabbar 的 badgeValue
UIViewController *tController = [self.tabBarController.viewControllers objectAtIndex:2];int badgeValue = [tController.tabBarItem.badgeValue intValue];tController.tabBarItem.badgeValue = [NSString stringWithFormat:@"%d",badgeValue+1];
如果想改变自己的（一个navigation下的controller）
self.navigationController.tabBarItem.badgeValue = nil[NSString stringWithFormat:@"Hight: %d°%@ Low: %d°%@", [Temp],@"C",[lTemp],@"C"];NSString to NSData:NSString* str= @"kilonet";NSData* data=[str dataUsingEncoding:NSUTF8StringEncoding]; 2. NSDate 用法：NSDate *today;NSDate *tomorrow;today = [NSDate date];tomorrow = [NSDate dateWithTimeInterval:(i*24*60*60) sinceDate:today]; //可能有更好的Date format用法：-(NSString *) getDay:(NSDate *) d {NSString *s ;NSDateFormatter *format = [[NSDateFormatter alloc] init];[format setDateFormat:@"YYYY/MM/dd hh:mm:ss"];s = [format stringFromDate:d];[format release];return s;
}各地时区获取：
代码NSDate *nowDate = [NSDate new];NSDateFormatter *formatter = [[NSDateFormatter alloc] init];[formatter setDateFormat:@"yyyy/MM/dd HH:mm:ss"];// 根据时区名字获取当前时间，如果该时区不存在，默认获取系统当前时区的时间// NSTimeZone* timeZone = [NSTimeZone timeZoneWithName:@"Europe/Andorra"]; // [formatter setTimeZone:timeZone];//获取所有的时区名字NSArray *array = [NSTimeZone knownTimeZoneNames];// NSLog(@"array:%@",array);//for循环// for(int i=0;i<[array count];i++)// {// NSTimeZone* timeZone = [NSTimeZone timeZoneWithName:[array objectAtIndex:i]];// [formatter setTimeZone:timeZone];// NSString *locationTime = [formatter stringFromDate:nowDate];// NSLog(@"时区名字:%@ : 时区当前时间: %@",[array objectAtIndex:i],locationTime);// //NSLog(@"timezone name is:%@",[array objectAtIndex:i]);// } //快速枚举法for(NSString *timeZoneName in array){[formatter setTimeZone:[NSTimeZone timeZoneWithName:timeZoneName]];NSLog(@"%@,%@",timeZoneName,[formatter stringFromDate:nowDate]);}[formatter release];[nowDate release];获取毫秒时间：
代码
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];[dateFormatter setDateStyle:NSDateFormatterMediumStyle];[dateFormatter setTimeStyle:NSDateFormatterShortStyle];//[dateFormatter setDateFormat:@"hh:mm:ss"][dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss.SSS"];NSLog(@"Date%@", [dateFormatter stringFromDate:[NSDate date]]);[dateFormatter release];3. NSCalendar用法：-(NSString *) getWeek:(NSDate *) d {NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];unsigned units = NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit | NSWeekdayCalendarUnit;NSDateComponents *components = [calendar components:units fromDate:d];[calendar release];switch ([components weekday]) {case 2:return @"Monday";break;case 3:return @"Tuesday";break;case 4:return @"Wednesday";break;case 5:return @"Thursday";break;case 6:return @"Friday";break;case 7:return @"Saturday";break;case 1:return @"Sunday";break;default:return @"No Week";break;}// 用components，我们可以读取其他更多的数据。}4. 用Get方式读取网络数据：// 将网络数读取为字符串
- (NSString *) getDataByURL:(NSString *) url {return [[NSString alloc] initWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:[url stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]]] encoding:NSUTF8StringEncoding];
}//读取网络图片
- (UIImage *) getImageByURL:(NSString *) url {return [[UIImage alloc] initWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:[url stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]]]];
}5. 多线程NSThread用法 ：[NSThread detachNewThreadSelector:@selector(scheduleTask) toTarget:self withObject:nil];-(void) scheduleTask {//create a pool NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];//release the pool;[pool release];
}//如果有参数，则这么使用：
[NSThread detachNewThreadSelector:@selector(scheduleTask:) toTarget:self withObject:[NSDate date]];-(void) scheduleTask:(NSDate *) mdate {//create a pool NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];//release the pool;[pool release];
}//注意selector里有冒号。//在线程里运行主线程里的方法 [self performSelectorOnMainThread:@selector(moveToMain) withObject:nil waitUntilDone:FALSE];6. 定时器NSTimer用法:代码// 一个可以自动关闭的Alert窗口UIAlertView *alert = [[UIAlertView alloc] initWithTitle:nil message:[@"一个可以自动关闭的Alert窗口"delegate:nil cancelButtonTitle:nil //NSLocalizedString(@"OK", @"OK") //取消任何按钮otherButtonTitles:nil];//[alert setBounds:CGRectMake(alert.bounds.origin.x, alert.bounds.origin.y, alert.bounds.size.width, alert.bounds.size.height+30.0)];[alert show];UIActivityIndicatorView *indicator = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];// Adjust the indicator so it is up a few pixels from the bottom of the alert indicator.center = CGPointMake(alert.bounds.size.width/2, alert.bounds.size.height-40.0);[indicator startAnimating];[alert insertSubview:indicator atIndex:0];[indicator release];[NSTimer scheduledTimerWithTimeInterval:3.0ftarget:selfselector:@selector(dismissAlert:)userInfo:[NSDictionary dictionaryWithObjectsAndKeys:alert, @"alert", @"testing ", @"key" ,nil] //如果不用传递参数，那么可以将此项设置为nil.repeats:NO];NSLog(@"release alert");[alert release];-(void) dismissAlert:(NSTimer *)timer{NSLog(@"release timer");NSLog([[timer userInfo] objectForKey:@"key"]);UIAlertView *alert = [[timer userInfo] objectForKey:@"alert"];[alert dismissWithClickedButtonIndex:0 animated:YES];}定时器停止使用：[timer invalidate];timer = nil;7. 用户缺省值NSUserDefaults读取：//得到用户缺省值NSUserDefaults *defs = [NSUserDefaults standardUserDefaults];//在缺省值中找到AppleLanguages, 返回值是一个数组NSArray* languages = [defs objectForKey:@"AppleLanguages"];NSLog(@"all language语言 is %@", languages);//在得到的数组中的第一个项就是用户的首选语言了NSLog(@"首选语言 is %@",[languages objectAtIndex:0]); //get the language & country codeNSLocale *currentLocale = [NSLocale currentLocale];NSLog(@"Language Code is %@", [currentLocale objectForKey:NSLocaleLanguageCode]); NSLog(@"Country Code is %@", [currentLocale objectForKey:NSLocaleCountryCode]); 8. View之间切换的动态效果设置：SettingsController *settings = [[SettingsController alloc]initWithNibName:@"SettingsView" bundle:nil];settings.modalTransiti*****tyle = UIModalTransiti*****tyleFlipHorizontal; //水平翻转[self presentModalViewController:settings animated:YES];[settings release];9.NSScrollView 滑动用法：-(void) scrollViewDidScroll:(UIScrollView *)scrollView{NSLog(@"正在滑动中...");
}//用户直接滑动NSScrollView，可以看到滑动条
-(void) scrollViewDidEndDecelerating:(UIScrollView *)scrollView {}// 通过其他控件触发NSScrollView滑动，看不到滑动条
- (void) scrollViewDidEndScrollingAnimation:(UIScrollView *)scrollView {}10. 读取全局的Delegate：KiloNetAppDelegate *appdelegate = (KiloNetAppDelegate *)[[UIApplication sharedApplication] delegate];11.键盘处理系列//set the UIKeyboard to switch to a different text field when you press return//switch textField to the name of your textfield
[textField becomeFirstResponder];12. 半透明层的实现：半透明层
+(void)showWaiting:(UIView *)parent {int width = 32, height = 32;CGRect frame = [parent frame]; //[[UIScreen mainScreen] applicationFrame];int x = frame.size.width;int y = frame.size.height;frame = CGRectMake((x - width) / 2, (y - height) / 2, width, height);UIActivityIndicatorView* progressInd = [[UIActivityIndicatorView alloc] initWithFrame:frame];[progressInd startAnimating];progressInd.activityIndicatorViewStyle = UIActivityIndicatorViewStyleWhiteLarge;// frame = CGRectMake((x - 140)/2, (y - height) / 2 + height, 140, 30);
// UILabel *waitingLable = [[UILabel alloc] initWithFrame:frame];
// waitingLable.text = @"Proccesing...";
// waitingLable.textColor = [UIColor whiteColor];
// waitingLable.font = [UIFont systemFontOfSize:15];
// waitingLable.backgroundColor = [UIColor clearColor];frame = [parent frame];UIView *theView = [[UIView alloc] initWithFrame:frame];theView.backgroundColor = [UIColor blackColor];theView.alpha = 0.8;[theView addSubview:progressInd];
// [theView addSubview:waitingLable];[progressInd release];
// [waitingLable release];[theView setTag:9999];[parent addSubview:theView];[theView release];
}+(void)hideWaiting:(UIView *)parent {[[parent viewWithTag:9999] removeFromSuperview];
}13. 设置View的圆角：// 首先应用 #import <QuartzCore/QuartzCore.h>view.layer.cornerRadius = 10;
view.layer.masksToBounds = YES;14. UIWebView显示本地图片(目前有点问题，无法正确显示图片):代码NSString *imagePath = [[NSBundle mainBundle] resourcePath];imagePath = [imagePath stringByReplacingOccurrencesOfString:@"/" withString:@"//"];imagePath = [imagePath stringByReplacingOccurrencesOfString:@" " withString:@"%20"];NSLog(@"fileurl=%@",[NSString stringWithFormat:@"file:/%@//",imagePath]);//[self loadData:[html dataUsingEncoding:NSUTF8StringEncoding] MIMEType:@"text/html" textEncodingName:@"UTF-8" baseURL:[NSURL fileURLWithPath:[NSString stringWithFormat:@"file:/%@//",imagePath]] ];[self loadHTMLString:html baseURL:[NSURL fileURLWithPath:[NSString stringWithFormat:@"file:/%@//",imagePath] ]];NSString *path = [[NSBundle mainBundle] bundlePath];NSURL *baseURL = [NSURL fileURLWithPath:path];[UIWebView loadHTMLString:html baseURL:baseURL];//这段代码可以正确显示图片。1. 随机数：
srandom(time(NULL)); //随机数种子id d = random(); // 随机数2. 视频播放：MPMoviePlayerController *moviePlayer;moviePlayer = [[MPMoviePlayerController alloc]initWithContentURL:[NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"Movie" ofType:@"m4v"]]];//初始化视频播放器对象，并传入被播放文件的地址moviePlayer.movieControlMode = MPMovieControlModeDefault;[moviePlayer play];//此处有内存溢出3. 启动界面显示：iPhone软件启动后的第一屏图片是非常重要的往往就是loading载入中的意思。设置它说来也简单，但是却无比重要只需要在resource里面将你希望设置的图片更名为Default.png，这个图片就可以成为iPhone载入的缺省图片4. iPhone的系统目录://得到Document目录：
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];//得到temp临时目录：
NSString *tempPath = NSTemporaryDirectory();//得到目录上的文件地址：
NSString *文件地址 = [目录地址 stringByAppendingPathComponent:@"文件名.扩展名"];5. 状态栏显示Indicator：[UIApplication sharedApplication]workActivityIndicatorVisible = YES; 6.app Icon显示数字：- (void)applicationDidEnterBackground:(UIApplication *)application{[[UIApplication sharedApplication] setApplicationIconBadgeNumber:5];
}7.sqlite保存地址：代码NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);NSString *thePath = [paths objectAtIndex:0];NSString *filePath = [thePath stringByAppendingPathComponent:@"kilonet1.sqlite"];NSString *dbPath = [[[NSBundle mainBundle] resourcePath]stringByAppendingPathComponent:@"kilonet2.sqlite"]; 8.Application退出：exit(0);9. AlertView，Acti*****heet的cancelButton点击事件：代码
-(void) acti*****heet :(UIActi*****heet *) acti*****heet didDismissWithButtonIndex:(NSInteger) buttonIndex {NSLog(@"cancel acti*****heet........");//当用户按下cancel按钮if( buttonIndex == [acti*****heet cancelButtonIndex]) {exit(0);}
// //当用户按下destructive按钮
// if( buttonIndex == [acti*****heet destructiveButtonIndex]) {
// // DoSomething here.
// }
}- (void)alertView:(UIAlertView *)alertView willDismissWithButtonIndex:(NSInteger)buttonIndex {NSLog(@"cancel alertView........");if (buttonIndex == [alertView cancelButtonIndex]) {exit(0);}
} 10.给Window设置全局的背景图片：window.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"coolblack.png"]];11. UITextField文本框显示及对键盘的控制:代码
#pragma mark -
#pragma mark UITextFieldDelegate
//控制键盘跳转
- (BOOL)textFieldShouldReturn:(UITextField *)textField {if (textField == _txtAccount) {if ([_txtAccount.text length]==0) {return NO;}[_txtPassword becomeFirstResponder];} else if (textField == _txtPassword) {[_txtPassword resignFirstResponder];}return YES;
}//输入框背景更换
-(BOOL) textFieldShouldBeginEditing:(UITextField *)textField{[textField setBackground:[UIImage imageNamed:@"ctext_field_02.png"]];return YES;
}-(void) textFieldDidEndEditing:(UITextField *)textField{[textField setBackground:[UIImage imageNamed:@"ctext_field_01.png"]];
}12.UITextField文本框前面空白宽度设置以及后面组合按钮设置：代码//给文本输入框后面加入空白_txtAccount.rightView = _btnDropDown;_txtAccount.rightViewMode = UITextFieldViewModeAlways;//给文本输入框前面加入空白CGRect frame = [_txtAccount frame];frame.size.width = 5;UIView *leftview = [[UIView alloc] initWithFrame:frame];_txtAccount.leftViewMode = UITextFieldViewModeAlways;_txtAccount.leftView = leftview;13. UIScrollView 设置滑动不超出本身范围：[fcScrollView setBounces:NO]; 14. 遍历View里面所有的Subview：代码NSLog(@"subviews count=%d",[self.view.subviews count]);if ([self.view.subviews count] > 0) {for (UIView *curView in self.view.subviews) {NSLog(@"view.subviews=%@", [NSString stringWithUTF8String:object_getClassName(curView)]);}}14. 在drawRect里画文字：UIFont * f = [UIFont systemFontOfSize:20]; [[UIColor darkGrayColor] set]; NSString * text = @"hi \nKiloNet"; [text drawAtPoint:CGPointMake(center.x,center.y) withFont:f];15. NSArray查找是否存在对象时用indexOfObject,如果不存在则返回为NSNotFound.16. NString与NSArray之间相互转换：array = [string componentsSeparatedByString:@","];
string = [[array valueForKey:@"description"] componentsJoinedByString:@","];17. TabController随意切换tab bar：[self.tabBarController setSelectedIndex:tabIndex];或者 self.tabBarController.selectedIndex = tabIndex;或者实现下面的delegate来扑捉tab bar的事件： 代码
-(BOOL) tabBarController:(UITabBarController *)tabBarController shouldSelectViewController:(UIViewController *)viewController {if ([viewController.tabBarItem.title isEqualToString: NSLocalizedString(@"Logout",nil)]) {[self showLogout];return NO;}return YES;
}18. 自定义View之间切换动画：
代码
- (void) pushController: (UIViewController*) controllerwithTransition: (UIViewAnimationTransition) transition
{[UIView beginAnimati*****:nil context:NULL];[self pushViewController:controller animated:NO];[UIView setAnimationDuration:.5];[UIView setAnimationBeginsFromCurrentState:YES]; [UIView setAnimationTransition:transition forView:self.view cache:YES];[UIView commitAnimati*****];
}或者：代码
CATransition *transition = [CATransition animation];
transition.duration = kAnimationDuration;
transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
transition.type = kCATransitionPush;
transition.subtype = kCATransitionFromTop;
transitioning = YES;
transition.delegate = self;
[self.navigationController.view.layer addAnimation:transition forKey:nil];self.navigationController.navigationBarHidden = NO;
[self.navigationController pushViewController:tableViewController animated:YES];19. UIWebView加载时白色显示问题解决以及字体统一设置：uiWebView.opaque = NO; 代码20.计算字符串长度：CGFloat w = [title sizeWithFont:[UIFont fontWithName:@"Arial" size:18]].width; 21. iTunesLink should be your applicati***** linkNSString *iTunesLink = @".woa/wa/viewSoftware?id=xxxxxx&mt=8";[[UIApplication sharedApplication] openURL:[NSURL URLWithString:iTunesLink]];22.时间转换NSString & NSDate：-(NSDate *)NSStringDateT*****Date:(NSString *)string { NSDateFormatter *formatter = [[NSDateFormatter alloc] init];[formatter setTimeZone:[NSTimeZone timeZoneWithAbbreviation:@"UTC"]];[formatter setDateFormat:@"yyyy-MM-dd"];NSDate *date = [formatter dateFromString:string];[formatter release];return date;
}NSString *year = [myDate descriptionWithCalendarFormat:@"%Y" timeZone:nil locale:nil];or
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:@"yyyy"];//Optionally for time zone conversti*****
[formatter setTimeZone:[NSTimeZone timeZoneWithName:@"..."]];NSString *stringFromDate = [formatter stringFromDate:myNSDateInstance];22。 模拟器的文件位置其中#username#表示当前用户名:
/Users/#username#/Library/Application Support/iPhone Simulator/User/Applicati*****/23.在使用UISearchBar时，将背景色设定为clearColor，或者将translucent设为YES，都不能使背景透明，经过一番研究，发现了一种超级简单和实用的方法：1
[[searchbar.subviews objectAtIndex:0]removeFromSuperview];
背景完全消除了，只剩下搜索框本身了。 24. 图像与缓存 :UIImageView *wallpaper = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"icon.png"]]; // 会缓存图片UIImageView *wallpaper = [[UIImageView alloc] initWithImage:[UIImage imageWithContentsOfFile:@"icon.png"]]; // 不会缓存图片 25. iphone-常用的对视图图层(layer)的操作对图层的操作：(1.给图层添加背景图片：
myView.layer.contents = (id)[UIImage imageNamed:@"view_BG.png"].CGImage;(2.将图层的边框设置为圆脚
myWebView.layer.cornerRadius = 8;
myWebView.layer.masksToBounds = YES;(3.给图层添加一个有色边框
myWebView.layer.borderWidth = 5;
myWebView.layer.borderColor = [[UIColor colorWithRed:0.52 green:0.09 blue:0.07 alpha:1] CGColor];26. UIPopoverController 使用-(void) *****etting:(id) sender {SplitBaseController *detail = [[SettingServerController alloc] init];CGRect frame = [(UIView *)sender frame];frame.origin.y = 0;UIPopoverController *popwin = [[UIPopoverController alloc] initWithContentViewController:detail];[popwin setPopoverContentSize:CGSizeMake(400, 300) animated:YES];popwin.delegate = self;[popwin presentPopoverFromRect: frame inView:self.view permittedArrowDirecti*****:UIPopoverArrowDirectionAny animated:YES];[detail release];
} 27.在UINavigationBar中添加左箭头返回按钮在iPhone里面最讨厌的控件之一就是 UINavigationBar了。这个控件样式修改不方便，连添加按钮也特别麻烦。下面的例子是如何手动添加带箭头的按钮：UINavigationItem *item = [navBar.items objectAtIndex:0];
UINavigationItem *back = [[UINavigationItem alloc] initWithTitle:@"Back"];
NSArray *items = [[NSArray alloc] initWithObjects:back,item,nil];
[navBar setItems:items];- (BOOL)navigationBar:(UINavigationBar *)navigationBar
shouldPopItem:(UINavigationItem *)item{
//在此处添加点击back按钮之后的操作代码
return NO;
}
//uilable自动换行
CGSize titleBrandSizeForHeight = [titleBrand.text sizeWithFont:titleBrand.font];
CGSize titleBrandSizeForLines = [titleBrand.text sizeWithFont:titleBrand.font c*****trainedToSize:CGSizeMake(infoWidth, MAXFLOAT) lineBreakMode:UILineBreakModeWordWrap];
titleBrand.numberOfLines = ceil(titleBrandSizeForLines.height/titleBrandSizeForHeight.height);
if (titleBrand.numberOfLines <= 1) {
titleBrand.frame = CGRectMake(5, titleBrand.frame.size.height , infoWidth, titleBrandSizeForHeight.height);
}else {
titleBrand.frame = CGRectMake(5, titleBrand.frame.size.height , infoWidth, titleBrand.numberOfLines*titleBrandSizeForHeight.height);
}//UIButton 点击事件//创建UIButtonUIButton *sampleButton =[UIButton buttonWithType:UIButtonTypeRoundedRect];[sampleButton setFrame:CGRectMake(240,25,60,30)];[sampleButton setTitle:@"聊天" forState:UIControlStateNormal];[sampleButton.titleLabel setFont:[UIFont boldSystemFontOfSize:14]];[sampleButton addTarget:self action:@selector(onBtnClick:) forControlEvents:UIControlEventTouchUpInside];//onBtnClick为方法名称-(void) onBtnClick:(id)sender
{NSLog(@"按钮点击事件");
}//UIAlertView 输出UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"提示" message:@"提示信息" delegate:self cancelButtonTitle:@"取消"otherButtonTitles:nil]; //此括号中的属性不可少 cancelButtonTitle属于alert所有按钮中的一个[alert addButtonWithTitle:@"按钮2"];[alert addButtonWithTitle:@"按钮3"];[alert show];//弹出窗口按钮的点击事件
-(void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex{switch (buttonIndex) {case 0:NSLog(@"点击取消");break;case 1:NSLog(@"点击创建");break;case 2:NSLog(@"点击搜索");break;}[alertView release];
}消除所有消息
[[UIApplication sharedApplication] cancelAllLocalNotifications];如何设置UItextfield四个角的弧度
textField.layer.cornerRadius = 9.0;
#import <QuartzCore/QuartzCore.h>
任何数字千分分隔NSNumberFormatter *numberFormatter = [[[NSNumberFormatter alloc] init] autorelease];[numberFormatter setPositiveFormat:@"###,##0.00;"];NSString *formattedNumberString = [numberFormatter stringFromNumber:[NSNumber numberWithDouble:f]];return formattedNumberString;iPhone开发中一些使用小技巧是本文要介绍的内容，与友们分享一篇对编程友人有用的一篇文章，我们来看内容。
经过半年多的iphone开发，我发现在开发过程中最难的就是一些嘈杂的细节，而了解一些小技巧就会达到事半功倍的效果，下面我就总结一下在iphone开发中的一些小技巧。
1、如果在程序中想对某张图片进行处理的话（得到某张图片的一部分）可一用以下代码：
UIImage *image = [UIImage imageNamed:filename];
CGImageRef imageimageRef = image.CGImage; CGRect rect = CGRectMake(origin.x, origin.y ,size.width, size.height); CGImageRef imageRefRect = CGImageCreateWithImageInRect(imageRef, rect); UIImage *imageRect = [[UIImage alloc] initWithCGImage:imageRefRect];
2、判断设备是iphone还是iphone4的代码：
#define isRetina ([UIScreen instancesRespondToSelector:
@selector(currentMode)] ? CGSizeEqualToSize(CGSizeMake(640, 960),
[[UIScreen mainScreen] currentMode].size) : NO)
3、判断邮箱输入的是否正确：
- (BOOL) validateEmail: (NSString *) candidate {
NSString *emailRegex = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,4}";
NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegex];
return [emailTest evaluateWithObject:candidate];
}
4、如何把当前的视图作为照片保存到相册中去：
#import <QuartzCore/QuartzCore.h>
UIGraphicsBeginImageContext(currentView.bounds.size); //currentView 当前的view
[currentView.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
UIImageWriteToSavedPhotosAlbum(viewImage, nil, nil, nil);
5、本地通知（类似于push通知）按home键到后台十秒后触发：
UILocalNotification *notification=[[UILocalNotification alloc] init];
if (notification!=nil) {
NSLog(@">> support local notification");
NSDate *now=[NSDate new];
notification.fireDate=[now addTimeInterval:10];
notification.timeZone=[NSTimeZone defaultTimeZone];
notification.alertBody=@"该去吃晚饭了！";
[[UIApplication sharedApplication].scheduleLocalNotification:notification];
}
6、捕获iphone通话事件：
CTCallCenter *center = [[CTCallCenter alloc] init];
center.callEventHandler = ^(CTCall *call)
{
NSLog(@"call:%@", call.callState);
}
7、iOS 4 引入了多任务支持，所以用户按下 “Home” 键以后程序可能并没有退出而是转入了后台运行。如果您想让应用直接退出，最简单的方法是：在 info－plist 里面找到 Application does not run in background 一项，勾选即可。
8、使UIimageView的图像旋转：
float rotateAngle = M_PI;
CGAffineTransform transform =CGAffineTransformMakeRotation(rotateAngle);
imageView.transform = transform;
9、设置旋转的原点：
#import <QuartzCore/QuartzCore.h>
UIImageView *imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"bg.png"]];
imageView.layer.anchorPoint = CGPointMake(0.5, 1.0);
10、实现自定义的状态栏（遮盖状态栏）：
CGRect frame = {{0, 0}, {320, 20}};
UIWindow* wd = [[UIWindow alloc] initWithFrame:frame];
[wd setBackgroundColor:[UIColor clearColor]];
[wd setWindowLevel:UIWindowLevelStatusBar];
frame = CGRectMake(100, 0, 30, 20);
UIImageView* img = [[UIImageView alloc] initWithFrame:frame];
[img setContentMode:UIViewContentModeCenter];
[img setImage:[UIImage imageNamed:@"00_0103.png"]];
[wd addSubview:img];
[wd makeKeyAndVisible];
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:2];
frame.origin.x += 150;
[img setFrame:frame];
[UIView commitAnimations];
11、在程序中实现电话的拨打：
//添加电话图标按钮
UIButton *btnPhone = [[UIButton buttonWithType:UIButtonTypeCustom] retain];
btnPhone.frame = CGRectMake(280,10,30,30);
UIImage *image = [UIImage imageNamed:@"phone.png"];
[btnPhone setBackgroundImage:image forState:UIControlStateNormal];
//点击拨号按钮直接拨号
[btnPhone addTarget:self action:@selector(callAction:event:) forControlEvents:UIControlEventTouchUpInside];
[cell.contentView addSubview:btnPhone]; //cell是一个UITableViewCell
//定义点击拨号按钮时的操作
- (void)callAction:(id)sender event:(id)event{
NSSet *touches = [event allTouches];
UITouch *touch = [touches anyObject];
CGPoint currentTouchPosition = [touch locationInView:self.listTable];
NSIndexPath *indexPath = [self.listTable indexPathForRowAtPoint: currentTouchPosition];
if (indexPath == nil) {
return;
}
NSInteger section = [indexPath section];
NSUInteger row = [indexPath row];
NSDictionary *rowData = [datas objectAtIndex:row];
NSString *num = [[NSString alloc] initWithFormat:@"tel://%@",number]; //number为号码字符串
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:num]]; //拨号
}
12、更改iphone的键盘颜色：
1.只有这2种数字键盘才有效果。UIKeyboardTypeNumberPad，UIKeyboardTypePhonePad
2. keyboardAppearance ＝ UIKeyboardAppearanceAlert
- (void)textViewDidBeginEditing:(UITextView *)textView{
NSArray *ws = [[UIApplication sharedApplication] windows];
for(UIView *w in ws){
NSArray *vs = [w subviews];
for(UIView *v in vs)
{
if([[NSString stringWithUTF8String:object_getClassName(v)] isEqualToString:@"UIKeyboard"])
{
v.backgroundColor = [UIColor redColor];
}
}
}
13、设置时区
NSTimeZone *defaultTimeZone = [NSTimeZone defaultTimeZone];
NSTimeZone *tzGMT = [NSTimeZone timeZoneWithName:@"GMT"];
[NSTimeZone setDefaultTimeZone:tzGMT];
上面两个时区任意用一个。
14、Ipad隐藏键盘的同时触发方法。
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardWillHide:)
name:UIKeyboardWillHideNotification object:nil];
- (IBAction)keyboardWillHide:(NSNotification *)note
15、计算字符串的字数
-(int)calculateTextNumber:(NSString *)text
{
float number = 0.0;
int index = 0;
for (index; index < [text length]; index++)
{
NSString *protoText = [text substringToIndex:[text length] - index];
NSString *toChangetext = [text substringToIndex:[text length] -1 -index];
NSString *charater;
if ([toChangetext length]==0)
{
charater = protoText;
}
else
{
NSRange range = [text rangeOfString:toChangetext];
charater = [protoText stringByReplacingCharactersInRange:range withString:@""];
}
NSLog(charater);
if ([charater lengthOfBytesUsingEncoding:NSUTF8StringEncoding] == 3)
{
number++;
}
else
{
numbernumber = number+0.5;
}
}
return ceil(number);
} 键盘透明
textField.keyboardAppearance = UIKeyboardAppearanceAlert;状态栏的网络活动风火轮是否旋转
[UIApplication sharedApplication]workActivityIndicatorVisible，默认值是NO。截取屏幕图片
//创建一个基于位图的图形上下文并指定大小为CGSizeMake(200,400)
UIGraphicsBeginImageContext(CGSizeMake(200,400)); //renderInContext 呈现接受者及其子范围到指定的上下文
[self.view.layer renderInContext:UIGraphicsGetCurrentContext()];//返回一个基于当前图形上下文的图片UIImage *aImage = UIGraphicsGetImageFromCurrentImageContext();//移除栈顶的基于当前位图的图形上下文
UIGraphicsEndImageContext();//以png格式返回指定图片的数据
imageData = UIImagePNGRepresentation(aImage);更改cell选中的背景UIView *myview = [[UIView alloc] init];myview.frame = CGRectMake(0, 0, 320, 47);myview.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"0006.png"]];cell.selectedBackgroundView = myview;
iPhone键盘改变颜色
只有这2种数字键盘才有效果：UIKeyboardTypeNumberPad，UIKeyboardTypePhonePad
keyboardAppearance ＝ UIKeyboardAppearanceAlert
代码如下：
- NSArray *ws = [[UIApplication sharedApplication] windows];
- for(UIView *w in ws){
- NSArray *vs = [w subviews];
- for(UIView *v in vs){
- if([[NSString stringWithUTF8String:object_getClassName(v)] isEqualToString:@"UIKeyboard"]){
- v.backgroundColor = [UIColor redColor];
- }
- }
- }
从一个界面push到下一界面左上角返回按钮文字设置
在父viewController中如下设置：UIBarButtonItem *backbutton = [[UIBarButtonItem alloc]init];backbutton.title = @"返回列表";self.navigationItem.backBarButtonItem = backbutton;[backbutton release];navigationbar的back键触发其他事件
UIButton *back =[[UIButton alloc] initWithFrame:CGRectMake(200, 25, 63, 30)];
[back addTarget:self act
ion:@selector(reloadRowData:) forControlEvents:UIControlEventTouchUpInside];
[back setImage:[UIImage imageNamed:@"返回按钮.png"] forState:UIControlStateNormal];
UIBarButtonItem *backButtonItem = [[UIBarButtonItem alloc] initWithCustomView:back];
self.navigationItem.leftBarButtonItem = loginButtonItem
[back release];
[backButtonItem release];
防止屏幕暗掉锁屏[[UIApplication sharedApplication] setIdleTimerDisabled:YES];
将图片从左到右翻页效果显示UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 0, 470)];[imageView setImage:[UIImage imageNamed:@"Bg.jpg"]];self.myImageView =imageView;[self.view addSubview:imageView];[imageView release];CGContextRef context = UIGraphicsGetCurrentContext();[UIView beginAnimations:nil context:context];[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];[UIView setAnimationDuration:0.5];[myImageView setFrame:CGRectMake(0, 0, 310, 470)]; [UIView commitAnimations];让覆盖在下面层的视图接受触摸事件searchImage.exclusiveTouch = YES;//第一层
searchImage.userInteractionEnabled = NO;
myMapView.exclusiveTouch = NO;//第二层
myMapView.userInteractionEnabled = YES;View的缩放NSValue *touchPointValue = [[NSValue valueWithCGPoint:CGPointMake(100,100)] retain];
[UIView beginAnimations:nil context:touchPointValue];
transform = CGAffineTransformMakeScale(0.1,0.21);
firstPieceView.transform = transform;
[UIView commitAnimations]; cocos2d动作完成后执行的方法
用CCCallFunc 实现应该可以
id action=[CCCallFunc actionWithTarget:self selector:@selector(setFlikX:)];
- (void) setFlikX:(id) sender
{[sprite setFlipX:YES];
}设置游戏速度
- [[CCScheduler sharedScheduler] setTimeScale:XX];
这里的XX仍然是倍率：传入1表示原速，大于1表示增快，小于1表示放慢速度～
精灵定义好z值后，修改z值
[self reorderChild:kai_pai z:18];
UItableView 横向滚动
CGRect tableViewRect =CGRectMake(0.0,0.0,50.0,320.0);self.tableView =[[UITableView alloc] initWithFrame:tableViewRect style:UITableViewStylePlain];tableView.center =CGPointMake(self.view.frame.size.width /2,self.view.frame.size.height /2);tableView.delegate=self;tableView.dataSource =self;//tableview逆时针旋转90度。 tableView.transform =CGAffineTransformMakeRotation(-M_PI /2);// scrollbar 不显示tableView.showsVerticalScrollIndicator = NO;
==============================================================================================
(UITableViewCell*)tableViewUITableView*)aTableView cellForRowAtIndexPathNSIndexPath*)indexPath {
UITableViewCell*cell; cell =[tableView dequeueReusableCellWithIdentifier:@"identifier"]; if(cell ==nil){ cell =[[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier@"identifier"] autorelease]; // cell顺时针旋转90度 cell.contentView.transform =CGAffineTransformMakeRotation(M_PI /2); } return cell;
}得到用户的首选语言
NSUserDefaults* defs =[NSUserDefaults standardUserDefautls];//得到用户缺省值NSArray* languages =[defs objectForKey:@"AppleLanguages"];//在缺省值中找到AppleLanguages, 返回值是一个数组NSString* preferredLang =[languages objectAtIndex:0];//在得到的数组中的第一个项就是用户的首选语言了 判断设备总结
1234567891011//可通过苹果review + (NSString*)getDeviceVersion { size_t size; sysctlbyname("hw.machine", NULL, &size, NULL, 0); char*machine = (char*)malloc(size); sysctlbyname("hw.machine", machine, &size, NULL, 0); NSString*platform = [NSStringstringWithCString:machine encoding:NSUTF8StringEncoding]; free(machine); returnplatform; }
输出：
//@"iPad1,1"
//@"iPad2,1"
//@"i386"逗号后面数字解释：(i386是指模拟器)
1-WiFi版
2-GSM/WCDMA 3G版
3-CDMA版AppleTV(2G) (AppleTV2,1)
iPad (iPad1,1)
iPad2,1 (iPad2,1)Wifi版
iPad2,2 (iPad2,2)GSM3G版
iPad2,3 (iPad2,3)CDMA3G版
iPhone (iPhone1,1)
iPhone3G (iPhone1,2)
iPhone3GS (iPhone2,1)
iPhone4 (iPhone3,1)
iPhone4(vz) (iPhone3,3)iPhone4 CDMA版
iPhone4S (iPhone4,1)
iPodTouch(1G) (iPod1,1)
iPodTouch(2G) (iPod2,1)
iPodTouch(3G) (iPod3,1)
iPodTouch(4G) (iPod4,1)另外放两个固件下载地址：
/
UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone
或者
[[[UIDevice currentDevice] model] isEqualToString:@"iPad"];
判断设备是否有摄像头
[UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera];iphone xcode4.2 如何修改项目工程名称执行如下操作：view-->Utilities-->Show File Inspector 然后在右边的identity tab下的Project Name修改项目名称。 phone 使用Safari打开网页 .
- [[UIApplication sharedApplication] openURL:[NSURL URLWithString:@""]];
-
Objective-C 字符串去除空格、换行符
ObjC的每个NSString对象，均有一个 stringByTrimmingCharactersInSet 方法。这个方法接受的参数为 NSCharactersInSet 对象。
NSCharactersInSet 对象只有两个方法：whitespaceCharacterSet 和 whitespaceAndNewlineCharacterSet。前者仅去除空格；后者不仅去除空格，也会去除换行符。
NSString *str = @" 前 有 空 格，后 有 换 行 符！ ";
NSString *trimStr = [str stringByTrimmingCharactersInSet: [NSCharacterSet whitespaceAndNewlineCharacterSet]];
Phone 判断输入得邮箱是否合法
BOOL NSStringIsValidEmail(NSString *checkString)
{ NString *stricterFilterString = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}"; NSString *laxString = @".+@.+\.[A-Za-z]{2}[A-Za-z]*"; NSString *emailRegex = stricterFilter ? stricterFilterString : laxString; NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegex]; return [emailTest evaluateWithObject:checkString];
}2秒后执行方法 [self performSelector:@selector(addShrinkImg) withObject:self afterDelay:2.0f];
cocos2d 贞动画 CGSize winSize = [CCDirector sharedDirector].winSize;[[CCSpriteFrameCache sharedSpriteFrameCache] addSpriteFramesWithFile:@"skymenus01-07_default.plist"];CCSprite* _storyImage1=[CCSprite spriteWithSpriteFrameName:@"010001.png"];[_storyImage1 setPosition:ccp(winSize.width/2, winSize.height/2)];[self addChild:_storyImage1];NSMutableArray *walkAnimFrames = [NSMutableArray array];for( int i=1;i<9;i++){[walkAnimFrames addObject:[[CCSpriteFrameCache sharedSpriteFrameCache] spriteFrameByName:[NSString stringWithFormat:@"01000%d.png", i]]];}CCAnimation* animation = [CCAnimation animationWithFrames:walkAnimFrames delay:0.1f];// 执行一下调用结束方法
// id action1 = [CCSequence actions:[CCAnimate actionWithAnimation:animation restoreOriginalFrame:NO],[CCCallFuncN actionWithTarget:self selector:@selector(startGameScene)], nil];id action1 = [CCRepeatForever actionWithAction:[CCAnimate actionWithAnimation:animation restoreOriginalFrame:NO]];[_storyImage1 runAction:action1];常用代码整理： 12.判断邮箱格式是否正确的代码：//利用正则表达式验证 -(BOOL)isValidateEmail:(NSString *)email{ NSString *emailRegex = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}"; NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES%@",emailRegex]; return [emailTest evaluateWithObject:email];}13.图片压缩 用法：UIImage *yourImage= [self imageWithImageSimple:image scaledToSize:CGSizeMake(210.0, 210.0)];//压缩图片- (UIImage*)imageWithImageSimple:(UIImage*)image scaledToSize:(CGSize)newSize{ // Create a graphics image context UIGraphicsBeginImageContext(newSize); // Tell the old image to draw in this newcontext, with the desired // new size [image drawInRect:CGRectMake(0,0,newSize.width,newSize.height)]; // Get the new image from the context UIImage* newImage = UIGraphicsGetImageFromCurrentImageContext(); // End the context UIGraphicsEndImageContext(); // Return the new image. return newImage;} 14.亲测可用的图片上传代码- (IBAction)uploadButton:(id)sender { UIImage *image = [UIImage imageNamed:@"1.jpg"]; //图片名 NSData *imageData = UIImageJPEGRepresentation(image,0.5);//压缩比例 NSLog(@"字节数:%i",[imageData length]); // post url NSString *urlString = @"http://192.168.1.113:8090/text/UploadServlet"; //服务器地址 // setting up the request object now NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init] ; [request setURL:[NSURL URLWithString:urlString]]; [request setHTTPMethod:@"POST"]; // NSString *boundary = [NSString stringWithString:@"---------------------------14737809831466499882746641449"]; NSString *contentType = [NSString stringWithFormat:@"multipart/form-data;boundary=%@",boundary]; [request addValue:contentType forHTTPHeaderField: @"Content-Type"]; // NSMutableData *body = [NSMutableData data]; [body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]]; [body appendData:[[NSString stringWithString:@"Content-Disposition:form-data; name=\"userfile\"; filename=\"2.png\"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]]; //上传上去的图片名字 [body appendData:[[NSString stringWithString:@"Content-Type: application/octet-stream\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]]; [body appendData:[NSData dataWithData:imageData]]; [body appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]]; [request setHTTPBody:body]; // NSLog(@"1-body:%@",body); NSLog(@"2-request:%@",request); NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil]; NSString *returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding]; NSLog(@"3-测试输出：%@",returnString); 15.给imageView加载图片 UIImage *myImage = [UIImage imageNamed:@"1.jpg"]; [imageView setImage:myImage]; [self.view addSubview:imageView];16.对图库的操作选择相册： UIImagePickerControllerSourceTypesourceType=UIImagePickerControllerSourceTypeCamera; if (![UIImagePickerControllerisSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) { sourceType=UIImagePickerControllerSourceTypePhotoLibrary; } UIImagePickerController * picker = [[UIImagePickerControlleralloc]init]; picker.delegate = self; picker.allowsEditing=YES; picker.sourceType=sourceType; [self presentModalViewController:picker animated:YES];选择完毕： -(void)imagePickerController:(UIImagePickerController*)pickerdidFinishPickingMediaWithInfo:(NSDictionary *)info{ [picker dismissModalViewControllerAnimated:YES]; UIImage * image=[info objectForKey:UIImagePickerControllerEditedImage]; [self performSelector:@selector(selectPic:) withObject:imageafterDelay:0.1];} -(void)selectPic:(UIImage*)image{ NSLog(@"image%@",image); imageView = [[UIImageView alloc] initWithImage:image]; imageView.frame = CGRectMake(0, 0, image.size.width, image.size.height);[self.viewaddSubview:imageView]; [self performSelectorInBackground:@selector(detect:) withObject:nil];}detect为自己定义的方法，编辑选取照片后要实现的效果取消选择： -(void)imagePickerControllerDIdCancel:(UIImagePickerController*)picker{ [picker dismissModalViewControllerAnimated:YES];}17.跳到下个View nextWebView = [[WEBViewController alloc] initWithNibName:@"WEBViewController" bundle:nil]; [self presentModalViewController:nextWebView animated:YES];
//创建一个UIBarButtonItem右边按钮 UIBarButtonItem *rightButton = [[UIBarButtonItem alloc] initWithTitle:@"右边" style:UIBarButtonItemStyleDone target:self action:@selector(clickRightButton)]; [self.navigationItem setRightBarButtonItem:rightButton]; 设置navigationBar隐藏self.navigationController.navigationBarHidden = YES;//iOS开发之UIlabel多行文字自动换行 （自动折行）UIView *footerView = [[UIView alloc]initWithFrame:CGRectMake(10, 100, 300, 180)];UILabel *label = [[UILabel alloc]initWithFrame:CGRectMake(10, 100, 300, 150)];label.text = @"Hello world! Hello world!Hello world! Hello world! Hello world! Hello world! Hello world! Hello world!Hello world! Hello world! Hello world! Hello world! Hello world! Helloworld!";//背景颜色为红色label.backgroundColor = [UIColor redColor];//设置字体颜色为白色label.textColor = [UIColor whiteColor];//文字居中显示label.textAlignment = UITextAlignmentCenter;//自动折行设置label.lineBreakMode = UILineBreakModeWordWrap;label.numberOfLines = 0; 30.代码生成button CGRect frame = CGRectMake(0, 400, 72.0, 37.0); UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect]; button.frame = frame; [button setTitle:@"新添加的按钮" forState: UIControlStateNormal]; button.backgroundColor = [UIColor clearColor]; button.tag = 2000; [button addTarget:self action:@selector(buttonClicked:) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:button];31.让某个控件在View的中心位置显示：（某个控件，比如label，View）label.center = self.view.center;32.好看的文字处理以tableView中cell的textLabel为例子： cell.backgroundColor = [UIColorscrollViewTexturedBackgroundColor];//设置文字的字体
cell.textLabel.font = [UIFont fontWithName:@"AmericanTypewriter" size:100.0f];//设置文字的颜色
cell.textLabel.textColor = [UIColor orangeColor];//设置文字的背景颜色
cell.textLabel.shadowColor = [UIColor whiteColor];//设置文字的显示位置
cell.textLabel.textAlignment = UITextAlignmentCenter;33. ———————-隐藏Status Bar—————————–
读者可能知道一个简易的方法,那就是在程序的viewDidLoad中加入[[UIApplication sharedApplication]setStatusBarHidden:YES animated:NO];33. 更改AlertView背景 UIAlertView *theAlert = [[[UIAlertViewalloc] initWithTitle:@"Atention"message: @"I'm a Chinese!"delegate:nil cancelButtonTitle:@"Cancel" otherButtonTitles:@"Okay",nil] autorelease];[theAlert show];UIImage *theImage = [UIImageimageNamed:@"loveChina.png"]; theImage = [theImage stretchableImageWithLeftCapWidth:0topCapHeight:0];CGSize theSize = [theAlert frame].size;UIGraphicsBeginImageContext(theSize); [theImage drawInRect:CGRectMake(5, 5, theSize.width-10, theSize.height-20)];//这个地方的大小要自己调整，以适应alertview的背景颜色的大小。theImage = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext();theAlert.layer.contents = (id)[theImage CGImage];34. 键盘透明
textField.keyboardAppearance = UIKeyboardAppearanceAlert;状态栏的网络活动风火轮是否旋转
[UIApplication sharedApplication]workActivityIndicatorVisible，默认值是NO。35截取屏幕图片
//创建一个基于位图的图形上下文并指定大小为CGSizeMake(200,400)
UIGraphicsBeginImageContext(CGSizeMake(200,400)); //renderInContext 呈现接受者及其子范围到指定的上下文
[self.view.layer renderInContext:UIGraphicsGetCurrentContext()];//返回一个基于当前图形上下文的图片UIImage *aImage = UIGraphicsGetImageFromCurrentImageContext();//移除栈顶的基于当前位图的图形上下文
UIGraphicsEndImageContext();
//以png格式返回指定图片的数据
imageData = UIImagePNGRepresentation(aImage);
36更改cell选中的背景UIView *myview = [[UIView alloc] init];myview.frame = CGRectMake(0, 0, 320, 47);myview.backgroundColor = [UIColorcolorWithPatternImage:[UIImage imageNamed:@"0006.png"]];cell.selectedBackgroundView = myview; 37显示图像:
CGRect myImageRect = CGRectMake(0.0f, 0.0f, 320.0f, 109.0f);
UIImageView *myImage = [[UIImageView alloc] initWithFrame:myImageRect];
[myImage setImage:[UIImage imageNamed:@"myImage.png"]];
myImage.opaque = YES; //opaque是否透明
[self.view addSubview:myImage];38.能让图片适应框的大小（没有确认）NSString*imagePath = [[NSBundle mainBundle] pathForResource:@"XcodeCrash"ofType:@"png"]; UIImage *image = [[UIImage alloc]initWithContentsOfFile:imagePath];UIImage *newImage= [image transformWidth:80.f height:240.f];UIImageView *imageView = [[UIImageView alloc]initWithImage:newImage];[newImagerelease];[image release];[self.view addSubview:imageView]; 39.实现点击图片进行跳转的代码：生成一个带有背景图片的button，给button绑定想要的事件！UIButton *imgButton=[[UIButton alloc]initWithFrame:CGRectMake(0, 0, 120, 120)]; [imgButton setBackgroundImage:(UIImage *)[self.imgArray objectAtIndex:indexPath.row] forState:UIControlStateNormal]; imgButton.tag=[indexPath row]; [imgButton addTarget:self action:@selector(buttonClick:) forControlEvents:UIControlEventTouchUpInside];cocos2d加载gifUIWebView* web = [[UIWebView alloc]initWithFrame:CGRectMake(-8, -8, 560,600)];//固定图片[(UIScrollView *)[[web subviews] objectAtIndex:0] setBounces:NO]; NSString* gifFileName = @"Icon.png";NSMutableString* htmlStr = [NSMutableString string];[htmlStr appendString:@"<p><img src=\""];[htmlStr appendFormat:@"%@",gifFileName];[htmlStr appendString:@"\" alt=\"picture\"/>"];[web loadHTMLString:htmlStr baseURL:[NSURL fileURLWithPath:[[NSBundle mainBundle] bundlePath]]];[[[CCDirector sharedDirector]openGLView]addSubview:web];
，，，单双击判断switch (makelove_) {case 0:[self.navigationController setNavigationBarHidden:YES];makelove_ =1;break;case 1:[self.navigationController setNavigationBarHidden:NO];makelove_ =0;break;default:break; }数组存在一个元素array_num = [[NSArray alloc]initWithObjects:@"I",@"II",@"III",@"IV",@"V", nil];[array_num containsObject:@"i"];
******************输出bool NSLog(@"%@",switch1[0].on?@"YES":@"NO");
1，在线程中更新ui，精灵[NSThread detachNewThreadSelector:@selector(updateProcess) toTarget:self withObject:nil];return self;
}
-(void)updateProcess{NSAutoreleasePool* p = [[NSAutoreleasePool alloc] init];sleep(10);[self performSelectorOnMainThread:@selector(updateUI) withObject:nil waitUntilDone:YES];[p release];}
-(void)updateUI{NSLog(@"this is run");CCSprite* demo = [CCSprite spriteWithFile:@"Icon.png"];demo.position = ccp(200,200);[self addChild:demo];
} //得到IMEI值 NSString *myImie=[[UIDevice currentDevice] uniqueIdentifier];
强制横竖屏：[[CCDirector sharedDirector] setDeviceOrientation:kCCDeviceOrientationLandscapeRight];
空精灵ccColor4B boardColor = ccc4(59, 203, 237, 128);
CCLayerColor * ground = [CCLayerColor layerWithColor:boardColor width:3152 height:768];
ground.anchorPoint = CGPointZero;
ground.position = CGPointZero;
画一个圆
-(void)intiUIOfView
{
UIBezierPath *path=[UIBezierPath bezierPath];
CGRect rect=[UIScreen mainScreen].applicationFrame;
[path addArcWithCenter:CGPointMake(rect.size.width/2,rect.size.height/2-20) radius:100 startAngle:0 endAngle:2*M_PI clockwise:NO];
arcLayer=[CAShapeLayer layer];
arcLayer.path=path.CGPath;//46,169,230
arcLayer.fillColor=[UIColor clearColor].CGColor;
arcLayer.strokeColor=[UIColor colorWithWhite:2 alpha:0.7].CGColor;
arcLayer.lineWidth=5;
arcLayer.frame=self.view.frame;
[self.view.layer addSublayer:arcLayer];
[self drawLineAnimation:arcLayer];
}
-(void)drawLineAnimation:(CALayer*)layer
{
CABasicAnimation *bas=[CABasicAnimation animationWithKeyPath:@"strokeEnd"];
bas.duration=10;
bas.delegate=self;
bas.fromValue=[NSNumber numberWithInteger:0];
bas.toValue=[NSNumber numberWithInteger:1];
[layer addAnimation:bas forKey:@"key"];
}
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