mixing objective-c and swift when subclassing

Question

I\'ve got a subclass of UIViewController written in Swift called \'BaseViewController\'. I now have an \'old\' view controller called \'ViewController1\' written in Objective-C

Answer 1

You cannot subclass a Swift class in Objective-C.

Excerpt from Using Swift with Cocoa and Objective-C

Answer 2

You cannot subclass a Swift class in Objective-C. cf. towards the end of this section of the docs:

However, note that you cannot subclass a Swift class in Objective-C.

Answer 3

It's an compiling error, so U can not subclass a swift class in objc.

SWIFT_CLASS("_TtC6Swifty14ViewController")
@interface ViewController : UIViewController
@end


# if defined(__has_attribute) && __has_attribute(objc_subclassing_restricted)
#  define SWIFT_CLASS(SWIFT_NAME) SWIFT_RUNTIME_NAME(SWIFT_NAME) __attribute__((objc_subclassing_restricted)) SWIFT_CLASS_EXTRA
#  define SWIFT_CLASS_NAMED(SWIFT_NAME) __attribute__((objc_subclassing_restricted)) SWIFT_COMPILE_NAME(SWIFT_NAME) SWIFT_CLASS_EXTRA
# else
#  define SWIFT_CLASS(SWIFT_NAME) SWIFT_RUNTIME_NAME(SWIFT_NAME) SWIFT_CLASS_EXTRA
#  define SWIFT_CLASS_NAMED(SWIFT_NAME) SWIFT_COMPILE_NAME(SWIFT_NAME) SWIFT_CLASS_EXTRA
# endif
#endif