【ReactNative】真机上无法调试 could not connect to development server

ReactNative 版本 0.27.2  真机调试，一直红屏，报错

could not connect to development server



检测流程:

1.工程目录npm  start  OK

2.AppDelegate.m的localhost换成PC上的IP地址 192.168.0.103，且PC上的地址和手机上的同一局域网 OK

3.xcode提示

WebSocket connection failed with error Error Domain=NSPOSIXErrorDomain
表示连接超时，解决方法RCTWebSocketExecutor.m中的localhost换成PC地址，据说新版本不用换了

Connection to http://localhost:8081/debugger-proxy timed out. Are you running node proxy? If you are running on the device, check if you have the right IP address in RCTWebSocketExecutor.m.

 这个世界安静了...