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react-web里面的movies的例子，web运行没问题，但在xcode运行的时候报错了。报Unable to resolve module ReactJsonp 的错误。似乎ReactJsonp和ReactFetch这两个模块都加载不到。
var fetch = Platform.OS === 'web'? require('ReactJsonp'): require('ReactFetch');
我贴出报错的代码：
+ DEST=/Users/LiaoYingRay/Library/Developer/Xcode/DerivedData/RNmovies-floigkrygboxgoayhhrfadmwqzsd/Build/Products/Debug-iphonesimulator/RNmovies.app
+ '[' -z '' ']'
+ export NVM_DIR=/Users/LiaoYingRay/.nvm
+ NVM_DIR=/Users/LiaoYingRay/.nvm
+ [[ -s /Users/LiaoYingRay/.nvm/nvm.sh ]]
++ command -v brew
+ [[ -x /usr/local/bin/brew ]]
++ brew --prefix nvm
+ [[ -s /usr/local/Cellar/nvm/0.29.0/nvm.sh ]]
+ react-native bundle --entry-file index.ios.js --platform ios --dev true --bundle-output /Users/LiaoYingRay/Library/Developer/Xcode/DerivedData/RNmovies-floigkrygboxgoayhhrfadmwqzsd/Build/Products/Debug-iphonesimulator/RNmovies.app/main.jsbundle --assets-dest /Users/LiaoYingRay/Library/Developer/Xcode/DerivedData/RNmovies-floigkrygboxgoayhhrfadmwqzsd/Build/Products/Debug-iphonesimulator/RNmovies.app
bundle: Created ReactPackager
uncaught error Error: UnableToResolveError: Unable to resolve module ReactJsonp from /Users/LiaoYingRay/Projects/github/demo/RNmovies/SearchScreen.js: Invalid directory /Users/node_modules/ReactJsonp
at ResolutionRequest.js:351:15
at tryCallOne (/Users/LiaoYingRay/Projects/github/demo/RNmovies/node_modules/react-native/node_modules/promise/lib/core.js:37:12)
at /Users/LiaoYingRay/Projects/github/demo/RNmovies/node_modules/react-native/node_modules/promise/lib/core.js:123:15
at flush (/Users/LiaoYingRay/Projects/github/demo/RNmovies/node_modules/react-native/node_modules/promise/node_modules/asap/raw.js:50:29)
at doNTCallback0 (node.js:417:9)
at process._tickCallback (node.js:346:13)
See logs /var/folders/53/s7vfpx994bq379dcvh2j96r00000gn/T/react-packager.log
at SocketClient._handleMessage (SocketClient.js:139:23)
at BunserBuf.<anonymous> (SocketClient.js:53:42)
at emitOne (events.js:77:13)
at BunserBuf.emit (events.js:169:7)
at BunserBuf.process (/Users/LiaoYingRay/Projects/github/demo/RNmovies/node_modules/react-native/node_modules/bser/index.js:289:10)
at /Users/LiaoYingRay/Projects/github/demo/RNmovies/node_modules/react-native/node_modules/bser/index.js:244:12
at doNTCallback0 (node.js:417:9)
at process._tickCallback (node.js:346:13)
Command /bin/sh failed with exit code 1
找不到就手动install一下试试