MacOS系统实现React-Native跨平台开发（IOS和Android）

随后会蹦出来：

(node:62939) UnhandledPromiseRejectionWarning: Error: Failed to install CocoaPods dependencies for iOS project, which is required by this template.
Please try again manually: "cd ./firstApp/ios && pod install".
CocoaPods documentation: https://cocoapods.org/
    at runPodInstall (/Users/apple/Appleyk/GitHub/react/react-native-example/firstApp/node_modules/@react-native-commUnity/cli/build/tools/installPods.js:99:13)
    at processTicksAndRejections (internal/process/task_queues.js:93:5)
(node:62939) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 2)
(node:62939) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the node.js process with a non-zero exit code.

source 'Https://mirrors.tuna.tsinghua.edu.cn/git/CocoaPods/Specs.git'

Generating Pods project
Integrating client project
[!] Please close any current Xcode sessions and use `firstApp.xcworkspace` for this project from now on.
Pod installation complete! There are 33 dependencies from the Podfile and 37 total pods installed.
appledeMacBook-Pro:ios apple$ 

import React from 'react';
import {
  SafeAreaView,
  View,
  Text,
  StatusBar,
} from 'react-native';
const App: () => React$Node = () => {
  return (
         你好，朋友，
         欢迎打开我的第一个移动端App，祝你玩的愉快！
  );
};
export default App;