Potential issue with Obj-C class extensions

tthbalazs · April 30, 2021, 11:38am

After updating to Xcode 12.5, we noticed issues with one of our third-party library dependencies.

Screenshot 2021-04-30 at 13.27.20

It seems like symbols declared in an Objective-C class extension are not recognised. For example, the declaration of the highlighted method can be found here:

github.com

Leanplum/Leanplum-iOS-SDK/blob/aa4975caf836c44f42961672b2f786315dccb9c2/Leanplum-SDK/Classes/Features/Actions/LPActionContext-Internal.h#L38


      
          @property (readonly, strong) NSNumber *priority;
          @property (readonly, strong, nullable) LPActionContext *parentContext;
          @property (readonly) int contentVersion;
          @property (readonly, strong, nullable) NSString *key;
          @property (assign) BOOL preventRealtimeUpdating;
          @property (nonatomic, assign) BOOL isRooted;
          @property (nonatomic, assign) BOOL isPreview;
          @property (nonatomic, strong) LPContextualValues *contextualValues;
          
          
- (void)maybeDownloadFiles;
          - (id)objectNamed:(NSString *)name;
          - (void)preventRealtimeUpdating;
          + (void)sortByPriority:(NSMutableArray *)actionContexts;
          
          
@end
          
          
NS_ASSUME_NONNULL_END

Note: I'm not a developer on the Leanplum project, I'm just a consumer of the library

This method is available in Xcode 12.4 with the same version of the dependency. Because of the naming of the extension LPActionContext-Internal.h, I checked if an internal header was accidentally published and later corrected, but that is not the case.

I read the "Creating C Language Targets" section of the usage documentation (the latest version of the package manager clarified a few details about umbrella headers), but I couldn't find anything that would specifically mention these type of extensions.

Installing the same dependency via CocoaPods produces no issues.

Any help is appreciated.