对象不是 Expo(react-native) 应用程序中的函数

Question

我的应用程序没有启动。请帮我。这是代码库的问题吗？

编辑 1： 渲染时的另一个错误

错误：验证 app.json 中的字段时出现问题。见https://docs.expo.io/workflow/configuration/ • 不应有附加属性“nodeModulesPath”。

app.json 文件：

{
  "main": "node_modules/expo/AppEntry.js",
  "scripts": {
    "start": "expo start",
    "android": "expo start --android",
    "ios": "expo start --ios",
    "web": "expo start --web",
    "eject": "expo eject"
  },
  "dependencies": {
    "@expo/vector-icons": "^12.0.4",
    "@react-native-community/masked-view": "^0.1.10",
    "@react-navigation/bottom-tabs": "^5.11.10",
    "@react-navigation/native": "^5.9.4",
    "expo": "~41.0.1",
    "expo-status-bar": "~1.0.4",
    "firebase": "^8.2.3",
    "react": "16.13.1",
    "react-dom": "16.13.1",
    "react-native": "https://github.com/expo/react-native/archive/sdk-41.0.0.tar.gz",
    "react-native-gesture-handler": "^1.10.3",
    "react-native-reanimated": "^1.13.2",
    "react-native-safe-area-context": "^3.2.0",
    "react-native-screens": "^3.0.0",
    "react-native-stack": "^1.0.0-alpha11",
    "react-native-web": "~0.13.12",
    "react-navigation": "^4.4.4",
    "react-navigation-stack": "^2.10.4"
  },
  "devDependencies": {
    "@babel/core": "^7.9.0"
  },
  "private": true
}

编辑 2：

我卸载了react-native-stack，但是出现错误：Error: Module not found: Can't resolve 'react-native-stack'

我又安装了：

npm install react-native-stack

然后我在渲染中遇到了同样的问题（看第一张图片）并且在控制台中出现了这个错误：

1（黄色）

`Some of your project's dependencies are not compatible with currently installed expo package version:
 - react-native-reanimated - expected version range: ~2.1.0 - actual version installed: ^1.13.2
Your project may not work correctly until you install the correct versions of the packages.
To install the correct versions of these packages, please run: expo install [package-name ...]`

2（红色）

`Error: Problem validating fields in app.json. See https://docs.expo.io/workflow/configuration/
 • should NOT have additional property 'nodeModulesPath'.`

渲染答案：

 `√ Expo Webpack
  Compiled successfully in 5.25s

i ｢wds｣: Project is running at http://0.0.0.0:19006/
i ｢wds｣: webpack output is served from /
i ｢wds｣: Content not from webpack is served from C:\Users\Лёха\AppData\Roaming\npm\node_modules\expo-cli\node_modules\@expo\webpack-config\web-default
i ｢wds｣: 404s will fallback to /

编辑 3

我错了，所以我又把 react-native-stack 删了

npm uninstall react-native-stack

然后我删除了 App.js 文件中的导入：

import {createStackNavigator} from 'react-native-stack'

我仍然在 yarn.lock 文件中，但我认为 rm -rf node_modules 应该可以工作。我只是不明白，如何使用它。

`

Answer 1

编辑

您的 node_modules 中可能没有 react-native-screens？对于您正在使用的每个模块的反应导航，您还有其他需要导入的模块。这不是自动完成的。

旧答案

您在组件外部使用useScreens()。顺便说一句，useScreens() 已弃用，应替换为 enableScreens