最新版的 react-native 降级处理

(1)react-native init Demo
 
(2)adb devices
 
(3)react-native run-android
 
(4)ipconfig
 
(5)192.168.200.216:8081  连接connect 失败：格式问题
 
(6)菜单或左右摇动
 
(7)react-native start / yarn start / npm start

(8)react-native -v

(9)npm install -g react-native-cli

{
  "name": "signApp",
  "version": "0.0.1",
  "private": true,
  "scripts": {
    "start": "node node_modules/react-native/local-cli/cli.js start",
    "test": "jest"
  },
  "dependencies": {
    "babel-preset-react-native": "5.0.0",
    "react": "16.4.1",
    "react-native": "0.56.0"
  },
  "devDependencies": {
    "babel-jest": "23.4.0",
    "jest": "23.4.1",
    "react-test-renderer": "16.4.1"
  },
  "jest": {
    "preset": "react-native"
  }
}

{
  "name": "signApp",
  "version": "0.0.1",
  "private": true,
  "scripts": {
    "start": "node node_modules/react-native/local-cli/cli.js start",
    "test": "jest"
  },
  "dependencies": {
    "babel-core": "^6.26.3",
    "babel-loader": "^7.1.5",
    "react": "16.4.1",
    "react-native": "0.55.4"
  },
  "devDependencies": {
    "babel-jest": "23.4.0",
    "babel-preset-react-native": "4.0.0",
    "jest": "23.4.1",
    "react-test-renderer": "16.4.1"
  },
  "jest": {
    "preset": "react-native"
  }
}