在win 或 mac系统的终端下都有方便的ping命令来检测网络的连通性！

在iOS上可以使用苹果封装好的工具来开发ping连接测试

SimplePing

1. 主要接口

//初始化一个地址- (instancetype)initWithHostName:(NSString *)hostName NS_DESIGNATED_INITIALIZER;//开始ping- (void)start;//发送ping数据- (void)sendPingWithData:(nullable NSData *)data;//停止- (void)stop;

2. 主要回调

@optional//ping 开始- (void)simplePing:(SimplePing *)pinger didStartWithAddress:(NSData *)address;//ping 失败- (void)simplePing:(SimplePing *)pinger didFailWithError:(NSError *)error;//成功发送一份ping数据- (void)simplePing:(SimplePing *)pinger didSendPacket:(NSData *)packet sequenceNumber:(uint16_t)sequenceNumber;//发送ping数据失败- (void)simplePing:(SimplePing *)pinger didFailToSendPacket:(NSData *)packet sequenceNumber:(uint16_t)sequenceNumber error:(NSError *)error;//收到ping响应数据- (void)simplePing:(SimplePing *)pinger didReceivePingResponsePacket:(NSData *)packet sequenceNumber:(uint16_t)sequenceNumber;//收到未知响应数据- (void)simplePing:(SimplePing *)pinger didReceiveUnexpectedPacket:(NSData *)packet;

3. 测试程序SimplePing app

    

4. 示例中还有一个测试用的mactool,编译生成可执行文件，在终端下执行 

 ./SimplePing -4 www.baidu.com

  这样即可测试

 

https://developer.apple.com/library/content/samplecode/SimplePing/Introduction/Intro.html