我用react-init创建的我的RN项目工作正常，直到我做 npm install 才能让 react-native-elements 与 react-native-vector-icons 一起工作 . 我无法链接，它说我有反应本地而不是react-native-cli . 所以我卸载并反应原生并全局安装cli .

现在 npm start 告诉我，我有"The Expo SDK requires Expo to run" .

在ExpoKit instructions中它说：打开项目时，Android Studio可能会提示您升级Gradle或其他构建工具的版本，但不要这样做，因为您可能会得到意想不到的结果 . ExpoKit始终附带所有构建工具的最新支持版本 .

显然我没有听从那个建议，这是我的惩罚 . 但我该怎么办呢 . 我的项目非常复杂 .

这是有问题的 projects.json 和它的前版本 . 有什么办法可以回滚到我的工作安装吗？

{
  "name": "noam",
  "version": "0.0.1",
  "private": true,
  "main": "./node_modules/react-native-scripts/build/bin/crna-entry.js",
  "scripts": {
    "start": "react-native-scripts start",
    "eject": "react-native-scripts eject",
    "android": "react-native-scripts android",
    "ios": "react-native-scripts ios",
    "test": "jest"
  },
  "dependencies": {
    "eslint": "^4.19.1",
    "expo": "^27.0.0",
    "jsonloader": "^1.0.1",
    "object-path": "^0.11.4",
    "react": "16.3.1",
    "react-native": "0.55.3",
    "react-native-action-bar": "^2.0.5",
    "react-native-bluetooth-status": "^1.1.3",
    "react-native-checkbox": "^2.0.0",
    "react-native-cli": "^2.0.1",
    "react-native-collapsible": "^0.11.2",
    "react-native-drawer-layout": "^2.0.0",
    "react-native-elements": "^0.19.1",
    "react-native-exit-app": "^1.0.0",
    "react-native-material-dropdown": "^0.11.1",
    "react-native-scripts": "^1.14.1",
    "react-native-simple-radio-button": "^2.7.1",
    "react-native-tab-view": "0.0.77",
    "react-native-vector-icons": "^4.6.0",
    "react-navigation": "^1.5.11",
    "rn-stack-router": "^1.0.0"
  },
  "devDependencies": {
    "babel-eslint": "^8.2.3",
    "babel-jest": "22.4.3",
    "babel-preset-react-native": "4.0.0",
    "eslint-config-airbnb": "^16.1.0",
    "eslint-plugin-import": "^2.11.0",
    "eslint-plugin-jsx-a11y": "^6.0.3",
    "eslint-plugin-react": "^7.8.2",
    "is-arrayish": "^0.3.1",
    "jest": "22.4.3",
    "react-test-renderer": "16.3.1"
   },
  "jest": {
    "preset": "react-native"
  },
  "rnpm": {
    "assets": ["./assets/fonts/"]
  }
}

旧版本已插入第23行：

"react-native-cli": "^2.0.1",
"react-native-scripts": "^1.14.1",
"babel-eslint": "^8.2.3",

新闻：如果我做了 yarn install 然后 yarn start 在loooooong等待之后"creating package..."

那么为什么会这样呢？ npm的版本问题？

react-native expo