React Native iOS 之Could not connect to development server.

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React Native 是目前最火的开发框架，其他不说了，上Bug。

按照   React Native iOS环境搭建 高级版   

在mac上  搭建 React Native  环境，运行 项目 若出现了如下情况。 

模拟器上  显示

Xcode 打印

2016-02-16 17:01:49.806 [info][tid:com.facebook.React.JavaScript][RCTJSCProfiler.m:63] JSC profiler is not supported.

2016-02-16 17:01:50.089 [fatal][tid:main] Could not connect to development server.

Ensure the following:

- Node server is running and available on the same network - run 'npm start' from react-native root

- Node server URL is correctly set in AppDelegate

URL: http://localhost:8081/index.ios.bundle?platform=ios&dev=true

jsCodeLocation = [NSURL URLWithString:@"http://localhost:8081/index.ios.bundle?platform=ios&dev=true"];

jsCodeLocation = [NSURL URLWithString:@"http://127.0.0.1:8081/index.ios.bundle?platform=ios&dev=true"];

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