Xcode 11 UIKit.framework header file UIDocumentInteractionController.h added NS_CLASS_AVAILABLE_IOS(13_0) attribute to the Protocol UIDocumentInteractionControllerDelegate but this protocol existed before iOS 13 so that additional attribute should be removed or fixed.
NS_CLASS_AVAILABLE_IOS(13_0) attribute on Protocol UIDocumentInteractionControllerDelegate causes build error
bug has been filed
Can you provide a link to the filed bug? I also encountered this problem.
Link would be great, having the same issue here, which stops me from building properly for ios 13 and ios 12