检测网络状态的代码,使用block的形式:
Reachability * reach = [Reachability reachabilityWithHostname:@"www.google.com"]; reach.reachableBlock = ^(Reachability * reachability) { dispatch_async(dispatch_get_main_queue(), ^{ blockLabel.text = @"Block Says Reachable"; }); }; reach.unreachableBlock = ^(Reachability * reachability) { dispatch_async(dispatch_get_main_queue(), ^{ blockLabel.text = @"Block Says Unreachable"; }); }; [reach startNotifier];
使用通知的形式:
- (void)viewDidLoad { [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(reachabilityChanged:) name:kReachabilityChangedNotification object:nil]; } -(void)reachabilityChanged:(NSNotification*)note { Reachability * reach = [note object]; if([reach isReachable]) { notificationLabel.text = @"Notification Says Reachable"; } else { notificationLabel.text = @"Notification Says Unreachable"; } }