iOS监听网络状态(原生)

• 打开Xcode
• command + shift + 0
• 搜索 'Reachability'
• open project 拷贝 'Reachablity'到自己项目中
• 获取当前网络状态

Reachability *reachability = [Reachability reachabilityWithHostName:@"www.baidu.com"];
    NetworkStatus netStatus = [reachability currentReachabilityStatus];
    switch (netStatus) {
        case NotReachable:
            break;
        case ReachableViaWiFi:
            networkStatus = 
            break;
        case ReachableViaWWAN:
            break;
            
        default:
            break;
    }```

- 监听网络状态

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(reachabilityChanged:) name:kReachabilityChangedNotification object:nil];
[self.hostReachability startNotifier];

- 网络改变获取网络状态

• (void) reachabilityChanged:(NSNotification )note
  {
  Reachability curReach = [note object];
  NSParameterAssert([curReach isKindOfClass:[Reachability class]]);
  NetworkStatus netStatus = [reachability currentReachabilityStatus];
  }```