[BLOCKING] cannot build iOS application

[AndrewDongminYoo]

Expected Behavior

• Xcode 에디터 상에서는 인스펙터에 걸리는 부분이 없지만 빌드 시에 Objective-C 타입 에러가 발생

Actual Behavior

• Error Log looks like...

  ❌. @dongminyu/react-native-step-counter/ios/RNStepCounter.mm:45:48:
  expected a type

   - (NSDictionary *)dictionaryFromPedometerData:(CMPedometerData *)data {
                ^

  ❌ @dongminyu/react-native-step-counter/ios/RNStepCounter.mm:17:30:
  use of undeclared identifier 'CMPedometer'

   @"supported": @([CMPedometer isStepCountingAvailable]),
                       ^

  ❌ @dongminyu/react-native-step-counter/ios/RNStepCounter.mm:28:11:
  property 'pedometer' not found on object of type 'RNStepCounter *'

   [self.pedometer queryPedometerDataFromDate:startDate
             ^

  ❌ @dongminyu/react-native-step-counter/ios/RNStepCounter.mm:30:50:
  type-id cannot have a name

         withHandler:^(CMPedometerData *pedometerData, NSError *error) {
                                                                 ^

  ❌ @dongminyu/react-native-step-counter/ios/RNStepCounter.mm:30:66:
  expected ')'

   withHandler:^(CMPedometerData *pedometerData, NSError*error) {
                                 ^~~~~~~~~~~~~~~

  ❌ @dongminyu/react-native-step-counter/ios/RNStepCounter.mm:30:48:
  C++ requires a type specifier for all declarations

   withHandler:^(CMPedometerData *pedometerData, NSError *error) {
                ^

  ❌ @dongminyu/react-native-step-counter/ios/RNStepCounter.mm:31:53:
  use of undeclared identifier 'pedometerData'

   handler(@[[self dictionaryFromPedometerData:pedometerData]]);
                                          ^

  ❌ @dongminyu/react-native-step-counter/ios/RNStepCounter.mm:36:11:
  property 'pedometer' not found on object of type 'RNStepCounter *'

   [self.pedometer startPedometerUpdatesFromDate:[[NSDate date]init]
          ^

  ❌ @dongminyu/react-native-step-counter/ios/RNStepCounter.mm:37:53:
  type-id cannot have a name

    withHandler:^(CMPedometerData *pedometerData, NSError *error) {
                                  ^

  ❌ @dongminyu/react-native-step-counter/ios/RNStepCounter.mm:37:69:
  expected ')'

    withHandler:^(CMPedometerData *pedometerData, NSError *error) {
                                                           ^~~~~~~~~~~~~~~

  ❌ @dongminyu/react-native-step-counter/ios/RNStepCounter.mm:37:51:
  C++ requires a type specifier for all declarations

    withHandler:^(CMPedometerData *pedometerData, NSError *error) {
                 ^

  ❌ @dongminyu/react-native-step-counter/ios/RNStepCounter.mm:38:13:
  use of undeclared identifier 'pedometerData'

       if (pedometerData) {
              ^

  ❌ @dongminyu/react-native-step-counter/ios/RNStepCounter.mm:39:19:
  no visible @interface for 'RNStepCounter' declares the selector 'sendEventWithName:body:'

    [self sendEventWithName:@"StepCounter.stepCounterUpdate"
                ^

  ❌ @dongminyu/react-native-step-counter/ios/RNStepCounter.mm:55:54:
  property 'startDate' not found on object of type '__strong id'

       @"startDate": [formatter stringFromDate:data.startDate]?:[NSNull null],
            ~~~~ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  ❌ @dongminyu/react-native-step-counter/ios/RNStepCounter.mm:56:52:
  property 'endDate' not found on object of type '__strong id'

       @"endDate": [formatter stringFromDate:data.endDate]?:[NSNull null],
                                                    ^

  ❌ @dongminyu/react-native-step-counter/ios/RNStepCounter.mm:57:24:
  property 'numberOfSteps' not found on object of type '__strong id'

       @"steps": data.numberOfSteps?:[NSNull null],
                         ^

  ❌ @dongminyu/react-native-step-counter/ios/RNStepCounter.mm:58:27:
  property 'distance' not found on object of type '__strong id'

       @"distance": data.distance?:[NSNull null],
                      ^

  ❌ @dongminyu/react-native-step-counter/ios/RNStepCounter.mm:60:33:
  property 'floorsAscended' not found on object of type '__strong id'

       @"floorsAscended": data.floorsAscended?:[NSNull null],
                         ^

  ❌ @dongminyu/react-native-step-counter/ios/RNStepCounter.mm:61:34:
  property 'floorsDescended' not found on object of type '__strong id'

       @"floorsDescended": data.floorsDescended?:[NSNull null],
                               ^

Steps to Reproduce the Problem

1. yarn add @dongminyu/react-native-step-counter
2. ...
3. npx react-native run-ios --configuration Release

Specifications

you shold use this command.

npx react-native info

• INFO OUTPUT

System:
    OS: macOS 13.2.1
    CPU: (8) arm64 Apple M1 Pro
    Memory: 13.90 GB / 32.00 GB
    Shell: 5.8.1 - /bin/zsh
  Binaries:
    Node: 18.14.1 - ~/.nvm/versions/node/v18.14.1/bin/node
    Yarn: 1.22.19 - ~/.nvm/versions/node/v18.14.1/bin/yarn
    npm: 9.5.0 - ~/.nvm/versions/node/v18.14.1/bin/npm
    Watchman: 2023.02.13.00 - /opt/homebrew/bin/watchman
  Managers:
    CocoaPods: 1.12.0 - ~/.rbenv/shims/pod
  SDKs:
    iOS SDK:
      Platforms: DriverKit 22.2, iOS 16.2, macOS 13.1, tvOS 16.1, watchOS 9.1
    Android SDK:
      Android NDK: 22.1.7171670
  IDEs:
    Android Studio: Electric Eel 2022.1.1 Patch 1 Electric Eel 2022.1.1 Patch 1
    Xcode: 14.2/14C18 - /usr/bin/xcodebuild
  Languages:
    Java: 11.0.16 - /usr/bin/javac
  npmPackages:
    @react-native-community/cli: Not Found
    react: 18.2.0 => 18.2.0
    react-native: 0.71.3 => 0.71.3
    react-native-macos: Not Found
  npmGlobalPackages:
    *react-native*: Not Found

[AndrewDongminYoo]

개선한 부분들

1. 예제 앱이 아닌 별도의 앱을 빌드해서 임포트를 시도했었는데, 해당 앱 iOS 코드의 일부만 Objective-C++ 파일로 만들어져 있었지만, 그런 식으로 사용할 수 있는 것이 아니라는 것을 알게 되어, iOS 애플리케이션 폴더 내의 모든 Objective-C(.m) 파일의 이름을 Objective-C++(.mm)으로 변경했다. (Objective-C++의 문법은 Objective-C의 확장.) 아마도 @AndrewDongminYoo/walking_tracker 별도의 앱에서 이 라이브러리를 임포트해서 사용하려고 하는 과정에서, 마이그레이션해야 할 부분들 중 일부를 놓친 것 같다. - 리액트 네이티브 애플리케이션 iOS 변경사항 셋업 직전 커밋에서 이 부분에 대한 문서를 추가했다.
2. Flipper, Hermes, JSC 등 Expo 애플리케이션만 만들어봤을 때는 생소하게 느꼈던 개념들이 머릿속에 정리가 안되어 설정들이 충돌한 부분들이 있었다. 이 부분 역시 해결했고(NO_FLIPPER, NO_HERMES 등의 환경 변수 문제였어서 관련 커밋은 없다.)

앱은 이제 무사히 잘 빌드되기 때문에 이 이슈는 닫는다.