我的Reachability完全按照主题中的建议工作。
I have Reachability working exactly as suggested as in this thread.
我正在使用开源可达性 。但是我没有使用块而是通知,因此该过程非常类似于Apple的Reachability代码。
I am using the open source Reachability. However I am not using blocks but notifications, hence the process is pretty similar to the Apple's Reachability code.
我第一次启动应用程序时,我运行它并且它可以工作大。
The first time I start the app, I run this and it works great.
Reachability *reachability = [reach hostReachability]; [reachability startNotifier];reachabilityChanged:事件正在解雇:
The reachabilityChanged: event is firing:
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(reachability_Changed:) name:kReachabilityChangedNotification object:nil];然而,一旦我按下主页按钮并返回应用程序, startNotifier 在内部返回NO而不是YES。
However once I press the home button and come back to the app, the startNotifier returns internally a NO instead of a YES.
// Set it as our reachability queue, which will retain the queue if(!SCNetworkReachabilitySetDispatchQueue(self.reachabilityRef, self.reachabilitySerialQueue)) { #ifdef DEBUG NSLog(@"SCNetworkReachabilitySetDispatchQueue() failed: %s", SCErrorString(SCError())); #endif ... return NO;因此上述事件再也不会被解雇。
and hence the event above is never fired again.
除非我错误地使用了这个并且 startNotifier 只能在实例化可达性时在 init 中调用一次再也不会?
Unless I am using this wrongly and startNotifier should only be called once in init when reachability is instantiated and never again?
self.hostReachability = [Reachability reachabilityWithHostname:_HOST];推荐答案
您只需要拨打 [self.hostReachability startNotifier] 一次在init / load上。以下是基本需求的概要,使用通知而不是链接线程上的块方法:
You should only need to call [self.hostReachability startNotifier] once on init/load. Here's a rundown of your basic needs, using notifications rather than the block method on the linked thread:
添加 tonymillion / Reachability 库到您的项目。
为你的Reachability对象创建属性以确保它被保留,例如。
Create property for your Reachability object to make sure it's retained, eg.
@interface ViewController () { NSString *_HOST; } @property Reachability *hostReachability; @end
注册变更通知,并启动通知程序,例如。
Register for change notifications, and start the notifier, eg.
- (void)viewDidLoad { [super viewDidLoad]; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(reachabilityChanged:) name:kReachabilityChangedNotification object:nil]; _HOST = @"www.google"; self.hostReachability = [Reachability reachabilityWithHostname:_HOST]; [self.hostReachability startNotifier]; } - (void)viewDidUnload { [super viewDidUnload]; [[NSNotificationCenter defaultCenter] removeObserver:self]; }
最后,创建一个 reachabilityChanged:处理对可达性更改的响应的方法,例如。
Finally, create a reachabilityChanged: method to handle your response to Reachability changes, eg.
- (void)reachabilityChanged:(NSNotification*)notification { Reachability *notifier = [notification object]; NSLog(@"%@", [notifier currentReachabilityString]); }
注意:如果你按Home键并卸载应用程序,Reachability中的更改应在返回应用程序后立即触发通知。
Note: If you press the Home button and unload the app, changes in Reachability should fire a notification immediately upon returning to the app.
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iOS:可达性
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