error: bundling failed: Error: While trying to resolve module `react-native` from file `/Users/ios/Desktop/android/android/index.js`, the package `/Users/ios/Desktop/android/android/node_modules/react-native/package.json` was successfully found. However, this package itself specifies a `main` module field that could not be resolved (`/Users/ios/Desktop/android/android/node_modules/react-native/Libraries/react-native/react-native-implementation.js`. Indeed, none of these files exist:
* `/Users/ios/Desktop/android/android/node_modules/react-native/Libraries/react-native/react-native-implementation.js(.native||.ios.js|.native.js|.js|.ios.json|.native.json|.json)`
* `/Users/ios/Desktop/android/android/node_modules/react-native/Libraries/react-native/react-native-implementation.js/index(.native||.ios.js|.native.js|.js|.ios.json|.native.json|.json)`
at ResolutionRequest.resolveDependency (/Users/ios/Desktop/android/android/node_modules/metro/src/node-haste/DependencyGraph/ResolutionRequest.js:103:15)
at DependencyGraph.resolveDependency (/Users/ios/Desktop/android/android/node_modules/metro/src/node-haste/DependencyGraph.js:272:4579)
at dependencies.map.relativePath (/Users/ios/Desktop/android/android/node_modules/metro/src/DeltaBundler/traverseDependencies.js:376:19)
at Array.map (<anonymous>)
at resolveDependencies (/Users/ios/Desktop/android/android/node_modules/metro/src/DeltaBundler/traverseDependencies.js:374:16)
at /Users/ios/Desktop/android/android/node_modules/metro/src/DeltaBundler/traverseDependencies.js:212:33
at Generator.next (<anonymous>)
at step (/Users/ios/Desktop/android/android/node_modules/metro/src/DeltaBundler/traverseDependencies.js:297:313)
at /Users/ios/Desktop/android/android/node_modules/metro/src/DeltaBundler/traverseDependencies.js:297:473
at <anonymous>
答案 0 :(得分：1)
您最近升级了本机吗？如果是，那可能就是问题所在。
如果没有，请检查node_modules文件夹中的文件。
如果没有任何效果，请尝试以下操作：
删除node_modules文件夹，然后关闭打包程序。
然后从您的项目目录中使用命令npm install重新安装。