问题
I'm running into a problem with installing react-native-device-info into an existing react-native project (created using create-react-native-app and then ejecting)
I run:
yarn add react-native-device-info
yarn install
react-native link react-native-device-info
cd ios && pod install & cd ..
pod install installs RNDeviceInfo, but also React as a dependency?
I then run yarn ios as normal.
The MetroBundler fails with:
```
This warning is caused by a @providesModule declaration with the same name across two different files.
Loading dependency graph, done.
error: bundling failed: ambiguous resolution: module /Users/thomasclarke/dev/mobile-notifications-native/index.js tries to require react-native, but there are several files providing this module. You can delete or fix them:
/Users/thomasclarke/dev/mobile-notifications-native/ios/Pods/React/package.json/Users/thomasclarke/dev/mobile-notifications-native/node_modules/react-native/package.json```
I've raised a bug report, as this is clearly unacceptable behaviour, but is this something I can work around with my setup?
回答1:
It turns out that you can link to the react-native in your node_modules, which provides the necessary dependency. This was not done by default in the existing project, so here is the process:
1) Start from "clean" (e.g. with no react-native-device-info behaviour). Having messed around before this, I also found I had to clear out both my node_modules and my ios/Pods directories to clear out the legacy React package.
2) Update your Podfile to link to React (you will also have to add in any relevant subspecs and a separate pod for Yoga)
Here are the lines to add to your podfile:
pod 'React', :path => '../node_modules/react-native', :subspecs => [
'DevSupport',
'Core',
'RCTAnimation',
'RCTImage',
'RCTLinkingIOS',
'RCTSettings',
'RCTText'
]
pod 'yoga', :path => '../node_modules/react-native/ReactCommon/yoga'
3) Then run react-native link react-native-device-info
This will add react-native-device-info to your Podfile (along with android setup)
pod 'RNDeviceInfo', :path => '../node_modules/react-native-device-info'
4) Install everything as normal:
yarn install
cd ios
pod install
And you should now have a functioning build!
来源：https://stackoverflow.com/questions/52737251/how-do-i-prevent-react-native-device-info-causing-react-ambiguity-on-my-setup