iOS linker warning about duplicate method implementations

[TomSwift]

I'm seeing this warning from the native linker:

ld: warning: meta method 'UIDatePickerMode:' in category from /Users/nicholashodapp/Library/Developer/Xcode/DerivedData/Remitly-aouvfdqqojlkkyatnrqzidccuurd/Build/Products/Debug-iphonesimulator/RNDateTimePicker/libRNDateTimePicker.a(RNDateTimePickerManager.o) conflicts with same method from another category

I believe this code in react-native-community/datetimepicker is conflicting with this code in react-native.

It's not clear to me how I can omit including the React Native "Core" DatePicker; if that's possible then this likely isn't a real issue.

[vonovak]

hi! Thanks for reporting!

It's not clear to me how I can omit including the React Native "Core" DatePicker; if that's possible then this likely isn't a real issue.

Personally, I don't think it's possible to do this nicely even though I'm sure it'd be possible to eg. patch RN core and get rid of this.

We should probably rename this because the datepicker will stay in the core for another stable release or two I guess

[bakhadev]

Same error ld: warning: meta method 'UIDatePickerMode:' in category from /Users/admin/Library/Developer/Xcode/DerivedData/Project-dazbhadjvjgpppbrkjzsrawgavcm/Build/Intermediates.noindex/ArchiveIntermediates/Project/BuildProductsPath/Release-iphoneos/RNDateTimePicker/libRNDateTimePicker.a(RNDateTimePickerManager.o) conflicts with same method from another category

[mafortier-nexapp]

Same here

[JeremiahUL]

@vonovak Please was anything done to resolve this

[abelara]

I'm also getting the same warning.

Meta method 'UIDatePickerMode:' in category from /Users/edyloubaselonia/Library/Developer/Xcode/DerivedData/BlevinsincApp-fvfyqgaltdwyqdaolswvcvzpkyan/Build/Products/Debug-iphoneos/RNDateTimePicker/libRNDateTimePicker.a(RNDateTimePickerManager.o) conflicts with same method from another category

[Guuz]

Is it safe to ignore this warning? (i get it too)

[danilobuerger]

@Guuz it depends. If the method added via the categories is identical, then yes.

[wilav-dev]

Same here!

[PraveenTiruveedula]

Same here ld: warning: method '+UIDatePickerMode:' in category from /Users/username/Library/Developer/Xcode/DerivedData/Project-hfgjuzvwxkrpkiavrpljpyvqcimh/Build/Products/Debug-iphonesimulator/React-Core/libReact-Core.a(RCTDatePickerManager.o) conflicts with same method from another category

[billnbell]

let's rename this to avoid the conflict.

[numandev1]

update xcode to 12.5 will resolve problem or you can rename UIDatePickerMode to any other name in RCTDatePickerManager.m and use cocoapods-patch on react-native

[TomSwift]

update xcode to 12.5 will resolve problem or you can rename UIDatePickerMode to any other name in RCTDatePickerManager.m and use cocoapods-patch on react-native

@nomi9995 How does upgrading to XCode 12.5 resolve this? I'm on XCode 12.5 and still have this issue.

[binitgurzu]

+1

[binitgurzu]

still looking for solutions

[jimmihagenTrifecta]

this stops Expo EAS builds from working

[jkoutavas]

Seeing this warning with Xcode 12.5.1. It doesn't seem to be a problem for our app, but it is something we'd like to see addressed.

[rdjpalmer]

Does anyone have this working with EAS builds? I'm trying to migrate over at the moment.

let's rename this to avoid the conflict.

Is it as simple as this? I'm happy to give this a crack if someone can point me in the right direction (instances to rename) and how to get the project running for development. I tried but failed to get the tests to pass with zero code changes.

[Maker-Mark]

@jimmihagenTrifecta Any ideas on how to fix this in EAS? I'm seeing this for EXPO's modules ie › Linking MyApp » MyApp ⚠️ ld: method '-hasEnqueuedUICommands' in category from /Users/expo/Library/Developer/Xcode/DerivedData/MyApp-dtwttoustbxxbybkskymiaziukhb/Build/Intermediates.noindex/ArchiveIntermediates/MyApp/BuildProductsPath/Debug-iphoneos/expo-dev-menu/libexpo-dev-menu.a(DevMenuREANodesManager.o) conflicts with same method from another category ⚠️ ld: method '-runSyncUIUpdatesWithObserver:' in category from /Users/expo/Library/Developer/Xcode/DerivedData/MyApp-dtwttoustbxxbybkskymiaziukhb/Build/Intermediates.noindex/ArchiveIntermediates/MyApp/BuildProductsPath/Debug-iphoneos/expo-dev-menu/libexpo-dev-menu.a(DevMenuREANodesManager.o) conflicts with same method from another category

[NxsHbb]

Getting same warning

[610consulting]

I got that error too, any solution yet?

[TomSwift]

I suspect the reason this hasn't been fixed is because of how the ObjC macro RCT_ENUM_CONVERTER works. Changing the conflicting method name isn't straightforward because it must mirror the type name (i.e. 'UIDatePickerMode`).

I've silenced the warning in my application by patching React Native to remove (by commenting out) the RCTConvert (UIDatePicker category. The ideal fix would be for React Native to remove this deprecated component altogether.

[shupac]

+1

[btroia]

I've silenced the warning in my application by patching React Native to remove (by commenting out) the RCTConvert (UIDatePicker category. The ideal fix would be for React Native to remove this deprecated component altogether.

Hi, any chance you could share your patch? I'm having the same issue and tried patching the file via patch-package but no luck. Thanks in advance 💪

[000xuandu]

ld: method '+UIDatePickerMode:' in category from /Users/mac/Library/Developer/Xcode/DerivedData/CVSimply-fvfmdfibgexpzoftpwvfgxndmwlj/Build/Products/Debug-iphonesimulator/react-native-date-picker/libreact-native-date-picker.a(RNDatePickerManager.o) conflicts with same method from another category

"react-native-date-picker": "^3.4.3",

[joaquinbian]

I have this issue as well... any update?

[ShepSims]

We're getting this as well, still no valid fixes from anyone?

[billnbell]

try a rm-rf node_modules && yarn install

[ShepSims]

try a rm-rf node_modules && yarn install

Didnt fix anything

[NxsHbb]

It's been two years and the issue is still there....

[joaquinbian]

Honestly I don't know if it is ok, but I renamed UIDatePickerMode in RCTDatePickerManager.h and I did the same in RCTDatePickerManager and the build didn't stop any more... I hope this works, but please let me know if it is not the best solution :pray: