Reachability的用法 判断用户的网络状态

 - (void)viewDidLoad
 {
     [super viewDidLoad];

     // 监听网络状态发生改变的通知
     [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(networkStateChange) name:kReachabilityChangedNotification object:nil];

     // 获得Reachability对象
     self.reachability = [Reachability reachabilityForInternetConnection];
     // 开始监控网络
     [self.reachability startNotifier];

 //    // 1.获得Reachability对象
 //    Reachability *wifi = [Reachability reachabilityForLocalWiFi];
 //
 //    // 2.获得Reachability对象的当前网络状态
 //    NetworkStatus wifiStatus = wifi.currentReachabilityStatus;
 //    if (wifiStatus != NotReachable) {
 //        NSLog(@"是WIFI");
 //    }
 }

 - (void)dealloc
 {
     [self.reachability stopNotifier];
     [[NSNotificationCenter defaultCenter] removeObserver:self];
 }

 - (void)networkStateChange
 {
     NSLog(@"网络状态改变了");
     [self checkNetworkState];
 }

 - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
 {
     [self checkNetworkState];
 }

 /**
  *  监测网络状态
  */
 - (void)checkNetworkState
 {
     if ([HMNetworkTool isEnableWIFI]) {
         NSLog(@"WIFI环境");
     } else if ([HMNetworkTool isEnable3G]) {
         NSLog(@"手机自带网络");
     } else {
         NSLog(@"没有网络");
     }
 }