Suggested approach: Swift is a much more modern programming language, so it has a lot going for it. You might want to mention optionality, tuples, value types,
Codable, generics, among other things. However, don't get sucked into the trap of assuming the traffic is all one way: Objective-C has C and C++ compatibility, and compiles significantly faster.
Estimated difficulty: Intermediate
See the full list of iOS interview questions
Link copied to your pasteboard.