Question

我是React-native的新手，当我尝试构建我的第一个应用程序时，我遵循了所有说明，但遇到了这个错误。我已经清楚捕获npm重新启动，但是仍然出现此错误。

The development server returned response error code: 500

URL: http://10.0.2.2:8081/index.delta?platform=android&dev=true&minify=false

Body:
{"originModulePath":"F:\\React Native\\AttendenceSystem\\node_modules\\react-native\\Libraries\\react-native\\react-native-implementation.js","targetModuleName":"AccessibilityInfo","message":"Unable to resolve module `AccessibilityInfo` from `F:\\React Native\\AttendenceSystem\\node_modules\\react-native\\Libraries\\react-native\\react-native-implementation.js`: Module `AccessibilityInfo` does not exist in the Haste module map\n\nThis might be related to https://github.com/facebook/react-native/issues/4968\nTo resolve try the following:\n  1. Clear watchman watches: `watchman watch-del-all`.\n  2. Delete the `node_modules` folder: `rm -rf node_modules && npm install`.\n  3. Reset Metro Bundler cache: `rm -rf /tmp/metro-bundler-cache-*` or `npm start -- --reset-cache`.  4. Remove haste cache: `rm -rf /tmp/haste-map-react-native-packager-*`.","errors":[{"description":"Unable to resolve module `AccessibilityInfo` from `F:\\React Native\\AttendenceSystem\\node_modules\\react-native\\Libraries\\react-native\\react-native-implementation.js`: Module `AccessibilityInfo` does not exist in the Haste module map\n\nThis might be related to https://github.com/facebook/react-native/issues/4968\nTo resolve try the following:\n  1. Clear watchman watches: `watchman watch-del-all`.\n  2. Delete the `node_modules` folder: `rm -rf node_modules && npm install`.\n  3. Reset Metro Bundler cache: `rm -rf /tmp/metro-bundler-cache-*` or `npm start -- --reset-cache`.  4. Remove haste cache: `rm -rf /tmp/haste-map-react-native-packager-*`."}],"name":"Error","stack":"Error: Unable to resolve module `AccessibilityInfo` from `F:\\React Native\\AttendenceSystem\\node_modules\\react-native\\Libraries\\react-native\\react-native-implementation.js`: Module `AccessibilityInfo` does not exist in the Haste module map\n\nThis might be related to https://github.com/facebook/react-native/issues/4968\nTo resolve try the following:\n  1. Clear watchman watches: `watchman watch-del-all`.\n  2. Delete the `node_modules` folder: `rm -rf node_modules && npm install`.\n  3. Reset Metro Bundler cache: `rm -rf /tmp/metro-bundler-cache-*` or `npm start -- --reset-cache`.  4. Remove haste cache: `rm -rf /tmp/haste-map-react-native-packager-*`.\n    at ModuleResolver.resolveDependency (F:\\React Native\\AttendenceSystem\\node_modules\\metro\\src\\node-haste\\DependencyGraph\\ModuleResolution.js:167:1306)\n    at ResolutionRequest.resolveDependency (F:\\React Native\\AttendenceSystem\\node_modules\\metro\\src\\node-haste\\DependencyGraph\\ResolutionRequest.js:80:16)\n    at DependencyGraph.resolveDependency (F:\\React Native\\AttendenceSystem\\node_modules\\metro\\src\\node-haste\\DependencyGraph.js:237:485)\n    at Object.resolve (F:\\React Native\\AttendenceSystem\\node_modules\\metro\\src\\lib\\transformHelpers.js:116:25)\n    at dependencies.map.result (F:\\React Native\\AttendenceSystem\\node_modules\\metro\\src\\DeltaBundler\\traverseDependencies.js:298:29)\n    at Array.map (<anonymous>)\n    at resolveDependencies (F:\\React Native\\AttendenceSystem\\node_modules\\metro\\src\\DeltaBundler\\traverseDependencies.js:294:16)\n    at F:\\React Native\\AttendenceSystem\\node_modules\\metro\\src\\DeltaBundler\\traverseDependencies.js:159:33\n    at Generator.next (<anonymous>)\n    at step (F:\\React Native\\AttendenceSystem\\node_modules\\metro\\src\\DeltaBundler\\traverseDependencies.js:239:307)"}
processBundleResult
    BundleDownloader.java:285
access$200
    BundleDownloader.java:37
onResponse
    BundleDownloader.java:163
execute
    RealCall.java:153
run
    NamedRunnable.java:32
runWorker
    ThreadPoolExecutor.java:1113
run
    ThreadPoolExecutor.java:588
run
    Thread.java:818

Answer 1

该错误是由于您的本机项目版本引起的。

您必须立即通过此版本创建这样的项目--->

react-native初始ProjectName-版本0.55.4

只需等待下一个版本的React Native即可解决该问题。

Answer 2

如果您的包响应本机版本0.56，请查看您的package.json文件的依赖性和devDependencies ---->

 "react-native":"0.56.0"

在依赖项中将其更改为

"react-native":"0.55.4"

和devDependencies中的更改

"babel-preset-react-native": "5",

到

"babel-preset-react-native": "4.0.0",

最后运行

npm install

Answer 3

好像降级本机版本将解决此问题。您是否使用最新的0.56.1？新版本非常不稳定，尤其是在运行Windows的情况下。

降级到0.55.4应该可以解决您的问题：npm install react-native@0.55.4

您可以看看这个非常相似的问题：https://github.com/facebook/react-native/issues/14209

Answer 4

我认为您正在使用Windows。我最近遇到了同样的错误，当我在github问题react native上搜索它时，看到人们更改了package.json文件。下面是适合我的情况的方法，您可以根据需要进行调整；

{
  "name": "AwesomeProject",
  "version": "0.0.1",
  "private": true,
  "scripts": {
    "start": "node node_modules/react-native/local-cli/cli.js start",
    "test": "jest"
  },
  "dependencies": {
    "react": "16.3.1",
    "react-native": "0.55.4"
  },
  "devDependencies": {
    "babel-jest": "22.4.4",
    "babel-preset-react-native": "4.0.0",
    "jest": "22.4.4",
    "react-test-renderer": "16.3.1"
  },
  "jest": {
    "preset": "react-native"
  }
}

别忘了先删除node_modules文件夹，然后像上面一样更改package.json，最后运行npm install。

react-native错误：无法解析模块AccessibilityInfo

4 个答案: