Class Factory Methods If the Swift compiler fails to identify a class factory method, you can use the NS_SWIFT_NAME macro, passing the Swift signature of the initializer to have it imported correctly. For example: + (instancetype)recordWithRPM:(NSUInteger)RPM NS_SWIFT_NAME(init(rpm:)); If the Swift compiler mistakenly identifies a method as a class factory method, you can use the NS_SWIFT_NAME macro, passing the Swift signature of the method to have it imported correctly. For example: + (id)recordWithQuality:(double)quality NS_SWIFT_NAME(record(quality:));