Reachability网络情况之详解

Reachability判断网络情况

// 把Reachability声明成属性

@property (strong , nonatomic ) Reachability *reach;

//网络监听实现

-(void)setNetNotice

{

//开启网络状况监听 测试服务器状态

self.reach = [Reachability reachabilityWithHostName:@"www.baidu.com"];

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

[self.reach startNotifier];//开始监听.会启动一个run loop kReachabilityChangedNotification

}

//通知

- (void)reachabilityChanged:(NSNotification *)note{

self.reach = [note object];

NSParameterAssert([self.reach isKindOfClass:[Reachability class]]);

NetworkStatus status = [self.reach currentReachabilityStatus];

// 网络没有连接时

if(status == NotReachable){

// 弹出提示框

UIAlertView *alterView = [[UIAlertView alloc]initWithTitle:nil message:@"网络已断开" delegate:nil cancelButtonTitle:@"确定" otherButtonTitles: nil];

[alterView show];

}else if(status == ReachableViaWWAN){ // 使用流量时

UIAlertView *alterView = [[UIAlertView alloc]initWithTitle:nil message:@"当前为2G/3G网络,请注意流量" delegate:nil cancelButtonTitle:@"确定" otherButtonTitles: nil];

[alterView show];

}else if(status == ReachableViaWiFi){ // 链接wifi时

UIAlertView *alterView = [[UIAlertView alloc]initWithTitle:nil message:@"当前为WiFi网络" delegate:nil cancelButtonTitle:@"确定" otherButtonTitles: nil];

[alterView show];

}

}