本文介绍了我的表视图的数据一次又一次重装？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我正在从JSON服务器的响应，并表明对表视图数据，但是当我向下滚动数据将再次重新显示上重叠每个单元。谁能告诉我，为什么会这样呢？我的code是below`
self.title = @表数据; 如果（检查） { self.title = @第二页; } [自送出数据] deliveryCases = [[UITableView的页头] initWithFrame：方法CGRectMake（0,0，320，480）]; deliveryCases.backgroundColor =的UIColor clearColor] deliveryCases.dataSource =自我; deliveryCases.delegate =自我; [self.view addSubview：deliveryCases]; myCaseName = [[NSArray的页头]初始化]; - （UITableViewCell的*）的tableView：（UITableView的*）的tableView的cellForRowAtIndexPath：（NSIndexPath *）indexPath{ 静态的NSString * cellIdentifier = @CellIdentifier * UITableViewCell的细胞= [deliveryCases dequeueReusableCellWithIdentifier：cellIdentifier]; //显示在表视图中的数据 D = [deliveryCaseArray objectAtIndex：indexPath.row]; 如果（细胞==零） { 电池= [[UITableViewCell的页头] initWithStyle：UITableViewCellStyleDefault reuseIdentifier：cellIdentifier]; } myCaseName = d.caseName; *的UILabel = caseNameLbl [的UILabel页头] initWithFrame：方法CGRectMake（70，10，100，50）; caseNameLbl.text = [的NSString stringWithFormat：@％@，myCaseName] caseNameLbl.textColor =的UIColor blackColor] UIFont * boldFontlblDate = [UIFont boldSystemFontOfSize：[UIFont systemFontSize]]; [caseNameLbl并入setfont：boldFontlblDate]; caseNameLbl.backgroundColor =的UIColor clearColor] [cell.contentView addSubview：caseNameLbl]; *的UILabel = caseDateLbl [的UILabel页头] initWithFrame：方法CGRectMake（160，10，100，50）; NSDateFormatter *格式化= [[NSDateFormatter的alloc]初始化]; formatter.dateFormat = @M / D / YYYY; 的NSString * dateString = [格式化stringFromDate：[NSDate的日期]]; d.date = dateString; caseDateLbl.text = [的NSString stringWithFormat：@％@，dateString] caseDateLbl.textColor =的UIColor blackColor] UIFont * boldFontlblStatus = [UIFont boldSystemFontOfSize：[UIFont systemFontSize]]; [caseDateLbl并入setfont：boldFontlblStatus]; caseDateLbl.backgroundColor =的UIColor clearColor] [cell.contentView addSubview：caseDateLbl]; *的UILabel = caseStatusLbl [的UILabel页头] initWithFrame：方法CGRectMake（250，10，100，50）; caseStatusLbl.text = [的NSString stringWithFormat：@％@，d.status] caseStatusLbl.textColor =的UIColor blackColor] UIFont * boldFontlblTrack = [UIFont boldSystemFontOfSize：[UIFont systemFontSize]]; [caseStatusLbl并入setfont：boldFontlblTrack]; caseStatusLbl.backgroundColor =的UIColor clearColor] [cell.contentView addSubview：caseStatusLbl]; [单元setUserInteractionEnabled：YES]; tableView.allowsSelection = YES; 返回细胞;} - （NSInteger的）numberOfSectionsInTableView：（UITableView的*）tableView3{ 返回1;} - （NSInteger的）的tableView：（UITableView的*）的tableView numberOfRowsInSection：（NSInteger的）部分{ 返回deliveryCaseArray.count;} - （CGFloat的）的tableView：（UITableView的*）的tableView heightForHeaderInSection：（NSInteger的）部分{ 返回20.0;} - （UIView的*）的tableView：（UITableView的*）的tableView viewForHeaderInSection：（NSInteger的）部分{ 的UIView * headerView = [[UIView的的alloc] initWithFrame：方法CGRectMake（0，0，350，10）]; *的UILabel = LBL1 [的UILabel页头] initWithFrame：方法CGRectMake（10，0，100，50）; lbl1.text = @＃; [headerView addSubview：LBL1]; *的UILabel LBL2 = [[的UILabel页头] initWithFrame：方法CGRectMake（70，0，100，50）; lbl2.text = @案例＃; [headerView addSubview：LBL2]; *的UILabel = lbl3 [的UILabel页头] initWithFrame：方法CGRectMake（160，0，100，50）; lbl3.text = @日期; [headerView addSubview：lbl3]; *的UILabel = lbl4 [的UILabel页头] initWithFrame：方法CGRectMake（220，0，100，50）; lbl4.text = @状态类型; [headerView addSubview：lbl4]; 返回headerView;} - （无效）送出数据{ * NSUserDefaults的uidSave = [NSUserDefaults的standardUserDefaults] 的NSMutableDictionary *获取= [[的NSMutableDictionary的alloc]初始化]; [拿到的setObject：[uidSave valueForKey：@UID] forKey：@UID]; [拿到的setObject：@开放forKey：@型]; 的NSLog（@字典数据是要拿到％@，获得）; NSData的* jsonData = [NSJSONSerialization dataWithJSONObject：获取选项：kNilOptions错误：无]; * NSString的jsonInputString = [[NSString的页头] initWithData：jsonData编码：NSUTF8StringEncoding]; * NSString的后期= [[NSString的页头] initWithFormat：@R =％@，jsonInputString] NSURL * URL = [NSURL URLWithString：[的NSString stringWithFormat：@％@，caseTypeUrl]]; NSData的* POSTDATA = [交dataUsingEncoding：NSASCIIStringEncoding allowLossyConversion：YES]; * NSString的postLength = [的NSString stringWithFormat：@％吕氏春秋，（无符号长）POSTDATA长度]]; NSMutableURLRequest *请求= [NSMutableURLRequest requestWithURL：URL的CachePolicy：NSURLRequestReloadIgnoringCacheData timeoutInterval：120.0; [要求setURL：URL] [要求setHTTPMethod：@POST]; [申请的setValue：postLength forHTTPHeaderField：@内容长度]; [申请的setValue：@应用程序/ x-WWW的形式urlen codeDforHTTPHeaderField：@的Content-Type]; [要求setHTTPBody：POSTDATA]; NSError *错误; NSURLResponse *响应; NSData的* responseData = [NSURLConnection的sendSynchronousRequest：请求returningResponse：安培;响应错误：放大器;错误] 如果（responseData！=无） { jsonArray = [NSJSONSerialization JSONObjectWithData：responseData选项：kNilOptions错误：＆放大器;错误] 的NSLog（@价值观=======％@，JSONArray），其中; } 如果（错误） { 的NSLog（@错误％@，error.description）; UIAlertView中* alertView = [[UIAlertView中页头] initWithTitle：@错误消息：@服务器没有响应委托：自我cancelButtonTitle：@取消otherButtonTitles：无，无] [alertView秀] } //设置名称数组 deliveryCaseArray = [[NSMutableArray里的alloc]初始化]; //循环通过我们的JSON数组 的for（int i = 0; I＆LT; jsonArray.count;我++） { //创建对象 * NSString的DATE1 = [[jsonArray objectAtIndex：我] objectForKey：@日期]; * NSString的protracking2 = [[jsonArray objectAtIndex：我] objectForKey：@protracking]; * NSString的STATUS3 = [[jsonArray objectAtIndex：我] objectForKey：@状态]; [deliveryCaseArray ADDOBJECT：[数据对象页头] initWithDate：日期1 andCaseName：protracking2和STATUS：STATUS3]]; } [deliveryCases reloadData];} `解决方案
您正在对细胞的内容查看每次加子视图。只有当你的细胞是零，你应该添加子视图。修改此法
- （UITableViewCell的*）的tableView：（UITableView的*）的tableView的cellForRowAtIndexPath：（NSIndexPath *）indexPath{ 静态的NSString * cellIdentifier = @CellIdentifier * UITableViewCell的细胞= [deliveryCases dequeueReusableCellWithIdentifier：cellIdentifier];//显示在表视图中的数据 D = [deliveryCaseArray objectAtIndex：indexPath.row]; myCaseName = d.caseName; 如果（细胞==零） { 电池= [[UITableViewCell的页头] initWithStyle：UITableViewCellStyleDefault reuseIdentifier：cellIdentifier]; *的UILabel = caseNameLbl [的UILabel页头] initWithFrame：方法CGRectMake（70，10，100，50）; caseNameLbl.text = [的NSString stringWithFormat：@％@，myCaseName] caseNameLbl.textColor =的UIColor blackColor] UIFont * boldFontlblDate = [UIFont boldSystemFontOfSize：[UIFont systemFontSize]]; [caseNameLbl并入setfont：boldFontlblDate]; caseNameLbl.backgroundColor =的UIColor clearColor] [cell.contentView addSubview：caseNameLbl]; *的UILabel = caseDateLbl [的UILabel页头] initWithFrame：方法CGRectMake（160，10，100，50）; NSDateFormatter *格式化= [[NSDateFormatter的alloc]初始化]; formatter.dateFormat = @M / D / YYYY; 的NSString * dateString = [格式化stringFromDate：[NSDate的日期]]; d.date = dateString; caseDateLbl.text = [的NSString stringWithFormat：@％@，dateString] caseDateLbl.textColor =的UIColor blackColor] UIFont * boldFontlblStatus = [UIFont boldSystemFontOfSize：[UIFont systemFontSize]]; [caseDateLbl并入setfont：boldFontlblStatus]; caseDateLbl.backgroundColor =的UIColor clearColor] [cell.contentView addSubview：caseDateLbl]; *的UILabel = caseStatusLbl [的UILabel页头] initWithFrame：方法CGRectMake（250，10，100，50）; caseStatusLbl.text = [的NSString stringWithFormat：@％@，d.status] caseStatusLbl.textColor =的UIColor blackColor] UIFont * boldFontlblTrack = [UIFont boldSystemFontOfSize：[UIFont systemFontSize]]; [caseStatusLbl并入setfont：boldFontlblTrack]; caseStatusLbl.backgroundColor =的UIColor clearColor] [cell.contentView addSubview：caseStatusLbl]; }[单元setUserInteractionEnabled：YES];tableView.allowsSelection = YES;返回细胞;}I am getting the response from json server and show that data on table view but when i scroll down the data will show again again overlaps on each cell. Anyone can tell me why this happening?My Code is below`
self.title=@"Table Data"; if(check) { self.title = @"Second Page"; } [self sendData]; deliveryCases = [[UITableView alloc]initWithFrame:CGRectMake(0,0, 320, 480)]; deliveryCases.backgroundColor = [UIColor clearColor]; deliveryCases.dataSource = self; deliveryCases.delegate = self; [self.view addSubview:deliveryCases]; myCaseName = [[NSArray alloc]init]; -(UITableViewCell*)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *cellIdentifier = @"CellIdentifier"; UITableViewCell *cell = [deliveryCases dequeueReusableCellWithIdentifier:cellIdentifier]; // Showing data in table view d = [deliveryCaseArray objectAtIndex:indexPath.row]; if (cell == nil) { cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier]; } myCaseName = d.caseName; UILabel *caseNameLbl =[[UILabel alloc]initWithFrame:CGRectMake(70, 10, 100 ,50)]; caseNameLbl.text = [NSString stringWithFormat:@"%@",myCaseName]; caseNameLbl.textColor=[UIColor blackColor]; UIFont * boldFontlblDate = [UIFont boldSystemFontOfSize:[UIFont systemFontSize]]; [caseNameLbl setFont:boldFontlblDate]; caseNameLbl.backgroundColor =[UIColor clearColor]; [cell.contentView addSubview:caseNameLbl]; UILabel *caseDateLbl =[[UILabel alloc]initWithFrame:CGRectMake(160, 10, 100 ,50)]; NSDateFormatter *formatter = [[NSDateFormatter alloc] init]; formatter.dateFormat = @"M/d/yyyy"; NSString *dateString =[formatter stringFromDate:[NSDate date]]; d.date = dateString; caseDateLbl.text = [NSString stringWithFormat:@"%@", dateString]; caseDateLbl.textColor=[UIColor blackColor]; UIFont * boldFontlblStatus= [UIFont boldSystemFontOfSize:[UIFont systemFontSize]]; [caseDateLbl setFont:boldFontlblStatus]; caseDateLbl.backgroundColor =[UIColor clearColor]; [cell.contentView addSubview:caseDateLbl]; UILabel *caseStatusLbl =[[UILabel alloc]initWithFrame:CGRectMake(250, 10, 100 ,50)]; caseStatusLbl.text = [NSString stringWithFormat:@"%@", d.status]; caseStatusLbl.textColor=[UIColor blackColor]; UIFont * boldFontlblTrack= [UIFont boldSystemFontOfSize:[UIFont systemFontSize]]; [caseStatusLbl setFont:boldFontlblTrack]; caseStatusLbl.backgroundColor =[UIColor clearColor]; [cell.contentView addSubview:caseStatusLbl]; [cell setUserInteractionEnabled:YES]; tableView.allowsSelection=YES; return cell; } -(NSInteger) numberOfSectionsInTableView:(UITableView *)tableView3 { return 1; } -(NSInteger) tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { return deliveryCaseArray.count; } -(CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section { return 20.0; } -(UIView*)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section { UIView *headerView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 350 , 10)]; UILabel *lbl1 = [[UILabel alloc] initWithFrame:CGRectMake(10, 0, 100 , 50)]; lbl1.text = @"#"; [headerView addSubview:lbl1]; UILabel *lbl2 = [[UILabel alloc] initWithFrame:CGRectMake(70, 0, 100, 50)]; lbl2.text = @"Case #"; [headerView addSubview:lbl2]; UILabel *lbl3 = [[UILabel alloc] initWithFrame:CGRectMake(160, 0, 100, 50)]; lbl3.text = @"Date"; [headerView addSubview:lbl3]; UILabel *lbl4 = [[UILabel alloc] initWithFrame:CGRectMake(220, 0, 100, 50)]; lbl4.text = @"Status Type"; [headerView addSubview:lbl4]; return headerView; } -(void)sendData { NSUserDefaults *uidSave = [NSUserDefaults standardUserDefaults]; NSMutableDictionary *get = [[NSMutableDictionary alloc]init]; [get setObject:[uidSave valueForKey:@"uid"]forKey:@"uid"]; [get setObject:@"open" forKey:@"type"]; NSLog(@"Dictionary Data which is to be get %@",get); NSData* jsonData = [NSJSONSerialization dataWithJSONObject:get options:kNilOptions error:nil]; NSString *jsonInputString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding]; NSString *post = [[NSString alloc]initWithFormat:@"r=%@",jsonInputString]; NSURL *url=[NSURL URLWithString:[NSString stringWithFormat:@"%@",caseTypeUrl]]; NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES]; NSString *postLength = [NSString stringWithFormat:@"%lu", (unsigned long)[postData length]]; NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:120.0]; [request setURL:url]; [request setHTTPMethod:@"POST"]; [request setValue:postLength forHTTPHeaderField:@"Content-Length"]; [request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"]; [request setHTTPBody:postData]; NSError *error; NSURLResponse *response; NSData *responseData=[NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error]; if (responseData != nil) { jsonArray = [NSJSONSerialization JSONObjectWithData:responseData options:kNilOptions error:&error]; NSLog(@"Values =======%@",jsonArray); } if (error) { NSLog(@"error %@",error.description); UIAlertView *alertView = [[UIAlertView alloc]initWithTitle:@"Error" message:@"Server not responding" delegate:self cancelButtonTitle:@"cancel" otherButtonTitles:nil, nil]; [alertView show]; } // Set up names array deliveryCaseArray = [[NSMutableArray alloc]init]; // Loop through our json Array for (int i = 0 ; i <jsonArray.count; i++) { //create object NSString *date1 = [[jsonArray objectAtIndex:i]objectForKey:@"date"]; NSString *protracking2 = [[jsonArray objectAtIndex:i]objectForKey:@"protracking"]; NSString *status3 = [[jsonArray objectAtIndex:i]objectForKey:@"status"]; [deliveryCaseArray addObject:[[DataObjects alloc]initWithDate:date1 andCaseName:protracking2 andStatus:status3]]; } [deliveryCases reloadData]; } `解决方案
You are adding subview on cell's contentview each time. You should add subview only when your cell is nil. Modify this method
-(UITableViewCell*)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *cellIdentifier = @"CellIdentifier"; UITableViewCell *cell = [deliveryCases dequeueReusableCellWithIdentifier:cellIdentifier]; // Showing data in table view d = [deliveryCaseArray objectAtIndex:indexPath.row]; myCaseName = d.caseName; if (cell == nil) { cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier]; UILabel *caseNameLbl =[[UILabel alloc]initWithFrame:CGRectMake(70, 10, 100 ,50)]; caseNameLbl.text = [NSString stringWithFormat:@"%@",myCaseName]; caseNameLbl.textColor=[UIColor blackColor]; UIFont * boldFontlblDate = [UIFont boldSystemFontOfSize:[UIFont systemFontSize]]; [caseNameLbl setFont:boldFontlblDate]; caseNameLbl.backgroundColor =[UIColor clearColor]; [cell.contentView addSubview:caseNameLbl]; UILabel *caseDateLbl =[[UILabel alloc]initWithFrame:CGRectMake(160, 10, 100 ,50)]; NSDateFormatter *formatter = [[NSDateFormatter alloc] init]; formatter.dateFormat = @"M/d/yyyy"; NSString *dateString =[formatter stringFromDate:[NSDate date]]; d.date = dateString; caseDateLbl.text = [NSString stringWithFormat:@"%@", dateString]; caseDateLbl.textColor=[UIColor blackColor]; UIFont * boldFontlblStatus= [UIFont boldSystemFontOfSize:[UIFont systemFontSize]]; [caseDateLbl setFont:boldFontlblStatus]; caseDateLbl.backgroundColor =[UIColor clearColor]; [cell.contentView addSubview:caseDateLbl]; UILabel *caseStatusLbl =[[UILabel alloc]initWithFrame:CGRectMake(250, 10, 100 ,50)]; caseStatusLbl.text = [NSString stringWithFormat:@"%@", d.status]; caseStatusLbl.textColor=[UIColor blackColor]; UIFont * boldFontlblTrack= [UIFont boldSystemFontOfSize:[UIFont systemFontSize]]; [caseStatusLbl setFont:boldFontlblTrack]; caseStatusLbl.backgroundColor =[UIColor clearColor]; [cell.contentView addSubview:caseStatusLbl]; } [cell setUserInteractionEnabled:YES]; tableView.allowsSelection=YES; return cell; }
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我的表视图的数据一次又一次重装？
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