I have developed a couple of watch apps and I am getting the hang of it, but when I try to add a watch os target to a React Native App I get 47 errors that I do not understand.
I am attempting to follow this tutorial - How to add an Apple Watch Extension To your react native application.
Steps to Reproduce
1. Create a new React Native Project
First, I created a new React Native Project. (success ✅)
react-native init RNWithAppleWatch2. Build and Run the React Native Project
Then I can build and run the project. (success ✅)
cd RNWtihAppleWatch; npm run ios;3. Open the Project Workspace and add a Target
Next, I open the workspace file. At this point the React Native app builds and runs from xCode without issue too.
Inside the workspace I select the main project and click the + under targets.
From here I select watchOS and Watch App for iOS App:
With the following settings:
And I activate the target when asked:
And the Target is created.
6. Run the Watch Target
This is where the problems begin to surface. The first thing I notice is there is one error in the WatchApp Extension after the target is created:
There is some sort of problem Compiling Swift Sources?
If I try to run the WatchApp target in the simulator I get 47 errors:
How can I resolve these errors and run a basic Hello World with React Native and Apple Watch?
Package Versions
- react-native 0.63.3
- xCode 12.0.1
- macOS Catalina 10.15.6
Full Error Text
Ld /Users/xxx/Library/Developer/Xcode/DerivedData/RNWithAppleWatch-axogcnukcxagprhcahugtcdatqdx/Build/Intermediates.noindex/RNWithAppleWatch.build/Debug-watchsimulator/WatchApp\ Extension.build/Objects-normal/arm64/Binary/WatchApp\ Extension normal arm64 (in target 'WatchApp Extension' from project 'RNWithAppleWatch') cd /Users/xxx/Projects/learning/RNWithAppleWatch/ios /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -target arm64-apple-watchos7.0-simulator -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/WatchSimulator.platform/Developer/SDKs/WatchSimulator7.0.sdk -L/Users/xxx/Library/Developer/Xcode/DerivedData/RNWithAppleWatch-axogcnukcxagprhcahugtcdatqdx/Build/Products/Debug-watchsimulator -L/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/watchsimulator -L/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift-5.0/watchsimulator -F/Users/xxx/Library/Developer/Xcode/DerivedData/RNWithAppleWatch-axogcnukcxagprhcahugtcdatqdx/Build/xxx/Debug-watchsimulator -filelist /Users/xxx/Library/Developer/Xcode/DerivedData/RNWithAppleWatch-axogcnukcxagprhcahugtcdatqdx/Build/Intermediates.noindex/RNWithAppleWatch.build/Debug-watchsimulator/WatchApp\ Extension.build/Objects-normal/arm64/WatchApp\ Extension.LinkFileList -Xlinker -rpath -Xlinker /usr/lib/swift -Xlinker -rpath -Xlinker @executable_path/Frameworks -Xlinker -rpath -Xlinker @executable_path/../../Frameworks -dead_strip -Xlinker -object_path_lto -Xlinker /Users/xxx/Library/Developer/Xcode/DerivedData/RNWithAppleWatch-axogcnukcxagprhcahugtcdatqdx/Build/Intermediates.noindex/RNWithAppleWatch.build/Debug-watchsimulator/WatchApp\ Extension.build/Objects-normal/arm64/WatchApp\ Extension_lto.o -Xlinker -export_dynamic -Xlinker -no_deduplicate -Xlinker -objc_abi_version -Xlinker 2 -fapplication-extension -fobjc-link-runtime -L/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/watchsimulator -L/usr/lib/swift -Xlinker -add_ast_path -Xlinker /Users/xxx/Library/Developer/Xcode/DerivedData/RNWithAppleWatch-axogcnukcxagprhcahugtcdatqdx/Build/Intermediates.noindex/RNWithAppleWatch.build/Debug-watchsimulator/WatchApp\ Extension.build/Objects-normal/arm64/WatchApp_Extension.swiftmodule -e _WKExtensionMain -framework WatchKit -Xlinker -sectcreate -Xlinker __TEXT -Xlinker __entitlements -Xlinker /Users/xxx/Library/Developer/Xcode/DerivedData/RNWithAppleWatch-axogcnukcxagprhcahugtcdatqdx/Build/Intermediates.noindex/RNWithAppleWatch.build/Debug-watchsimulator/WatchApp\ Extension.build/WatchApp\ Extension.appex-Simulated.xcent -Xlinker -dependency_info -Xlinker /Users/xxx/Library/Developer/Xcode/DerivedData/RNWithAppleWatch-axogcnukcxagprhcahugtcdatqdx/Build/Intermediates.noindex/RNWithAppleWatch.build/Debug-watchsimulator/WatchApp\ Extension.build/Objects-normal/arm64/WatchApp\ Extension_dependency_info.dat -o /Users/xxx/Library/Developer/Xcode/DerivedData/RNWithAppleWatch-axogcnukcxagprhcahugtcdatqdx/Build/Intermediates.noindex/RNWithAppleWatch.build/Debug-watchsimulator/WatchApp\ Extension.build/Objects-normal/arm64/Binary/WatchApp\ Extensionld: warning: Could not find or use auto-linked library 'swiftCore'ld: warning: Could not find or use auto-linked library 'swiftHomeKit'ld: warning: Could not find or use auto-linked library 'swiftCoreGraphics'ld: warning: Could not find or use auto-linked library 'swiftDarwin'ld: warning: Could not find or use auto-linked library 'swiftUIKit'ld: warning: Could not find or use auto-linked library 'swiftFoundation'ld: warning: Could not find or use auto-linked library 'swiftsimd'ld: warning: Could not find or use auto-linked library 'swiftObjectiveC'ld: warning: Could not find or use auto-linked library 'swiftSwiftOnoneSupport'ld: warning: Could not find or use auto-linked library 'swiftWatchKit'ld: warning: Could not find or use auto-linked library 'swiftSceneKit'ld: warning: Could not find or use auto-linked library 'swiftDispatch'ld: warning: Could not find or use auto-linked library 'swiftMapKit'ld: warning: Could not find or use auto-linked library 'swiftCoreFoundation'ld: warning: Could not find or use auto-linked library 'swiftCoreLocation'Undefined symbols for architecture arm64:"value witness table for Builtin.Int64", referenced from: full type metadata for __C.CLKComplicationPrivacyBehavior in ComplicationController.o"nominal type descriptor for Foundation.Date", referenced from: _symbolic _____Sg 10Foundation4DateV in ComplicationController.o"_swift_getForeignTypeMetadata", referenced from: type metadata accessor for __C.CLKComplicationPrivacyBehavior in ComplicationController.o"static (extension in Foundation):Swift.Array._unconditionallyBridgeFromObjectiveC(__C.NSArray?) -> [A]", referenced from: @objc WatchApp_Extension.ComplicationController.handleSharedComplicationDescriptors([__C.CLKComplicationDescriptor]) -> () in ComplicationController.o"(extension in Foundation):Swift.Array._bridgeToObjectiveC() -> __C.NSArray", referenced from: reabstraction thunk helper from @escaping @callee_unowned @convention(block) (@unowned __C.NSArray) -> () to @escaping @callee_guaranteed (@guaranteed [__C.CLKComplicationDescriptor]) -> () in ComplicationController.o reabstraction thunk helper from @escaping @callee_unowned @convention(block) (@unowned __C.NSArray?) -> () to @escaping @callee_guaranteed (@guaranteed [__C.CLKComplicationTimelineEntry]?) -> () in ComplicationController.o"_swift_allocObject", referenced from: @objc WatchApp_Extension.ComplicationController.getComplicationDescriptors(handler: ([__C.CLKComplicationDescriptor]) -> ()) -> () in ComplicationController.o @objc WatchApp_Extension.ComplicationController.getTimelineEndDate(for: __C.CLKComplication, withHandler: (Foundation.Date?) -> ()) -> () in ComplicationController.o @objc WatchApp_Extension.ComplicationController.getPrivacyBehavior(for: __C.CLKComplication, withHandler: (__C.CLKComplicationPrivacyBehavior) -> ()) -> () in ComplicationController.o @objc WatchApp_Extension.ComplicationController.getCurrentTimelineEntry(for: __C.CLKComplication, withHandler: (__C.CLKComplicationTimelineEntry?) -> ()) -> () in ComplicationController.o @objc WatchApp_Extension.ComplicationController.getTimelineEntries(for: __C.CLKComplication, after: Foundation.Date, limit: Swift.Int, withHandler: ([__C.CLKComplicationTimelineEntry]?) -> ()) -> () in ComplicationController.o @objc WatchApp_Extension.ComplicationController.getLocalizableSampleTemplate(for: __C.CLKComplication, withHandler: (__C.CLKComplicationTemplate?) -> ()) -> () in ComplicationController.o"Swift.String.init(_builtinStringLiteral: Builtin.RawPointer, utf8CodeUnitCount: Builtin.Word, isASCII: Builtin.Int1) -> Swift.String", referenced from: WatchApp_Extension.ComplicationController.getComplicationDescriptors(handler: ([__C.CLKComplicationDescriptor]) -> ()) -> () in ComplicationController.o