Objective-C and C Code Customization
Apply macros to your Objective-C APIs to customize how they’re imported into Swift.
Topics
Customizing Objective-C APIs
Designating Nullability in Objective-C APIsRenaming Objective-C APIs for SwiftImproving Objective-C API Declarations for SwiftGrouping Related Objective-C ConstantsMarking API Availability in Objective-CMaking Objective-C APIs Unavailable in Swift