网络监控

使用官网Reachability库经行网络实时监控

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    //开启网络状况的监听
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(reachabilityChanged:) name:kReachabilityChangedNotification object:nil];

    self.hostReach = [Reachability reachabilityWithHostname:@"www.baidu.com"];
    [self.hostReach startNotifier];  //开始监听，会启动一个run loop
}


- (void) reachabilityChanged: (NSNotification*)notice {
    Reachability * reach = [notice object];
    
    if(![reach isReachable])
    {
       NSLog( @"网络不可用");
        return;
    } 
    if (reach.isReachableViaWiFi) {
        NSLog( @"当前通过wifi连接");
        return;
    }
    if (reach.isReachableViaWWAN) {
       NSLog(  @"当前通过手机网络连接");
        return;
    }
}