AFNetworking实时监测网络连接


//  网络变化消息
    [[NSNotificationCenter defaultCenter] addObserver: self selector: @selector(checkNetwork) name: kReachabilityChangedNotification object: nil];
    
    Reachability *reach = [Reachability reachabilityWithHostname: @“www.baidu.com"];
    //  开始监听
    [reach startNotifier];