ios - 持续检测互联网连接

Question

我希望我的应用能够自动检测互联网连接中断。所以我使用以下代码。

- (void)applicationDidBecomeActive:(UIApplication *)application {

    Reachability *networkReachability = [Reachability reachabilityForInternetConnection];
    NetworkStatus networkStatus = [networkReachability currentReachabilityStatus];
    if (networkStatus == NotReachable) {
        [Settings hideSpinner];
         //Show no internet connectivity dialog.
    } else {
    }
}

但问题是它没有持续检查互联网连接。 它仅在应用程序激活时检查。我如何才能在整个应用程序生命周期中持续检查互联网连接并在互联网自动关闭时发出警告？

Answer 1

应用程序启动后，您可以触发 NSTimer 来执行相同的操作:

- (void)applicationDidBecomeActive:(UIApplication *)application {
   NSTimer *timer = [NSTimer scheduledTimerWithTimeInterval:1.0f
                                              target:self
                                            selector:@selector(checkForConnectivity)
                                            userInfo:nil
                                             repeats:YES];
}

-(void)checkForConnectivity {
       Reachability *networkReachability = [Reachability reachabilityForInternetConnection];
       NetworkStatus networkStatus = [networkReachability currentReachabilityStatus];
       if (networkStatus == NotReachable) {
              //No internet connectivity - perform required action
       }
       else {
              //Internet connectivity is valid
      }
}

谢谢!