Why doesn't Swift force my designated initializer to call super?

Question

This code is legal in Swift:

class Snapper : NSObject {
    var anim : UIDynamicAnimator
    init(referenceView:UIView) {
        self.anim = UIDynamicAnimat         


        

Answer 1

It's not an answer of the why but adding a symbolic breakpoint on [NSObject init] shows that it gets called even if super.init() is commented out.

It definitely seems a special case as replacing NSObject with any other class makes the compiler warn again about the missing super call. My guess is the the compiler handles this as a special case given that it's our base class with just one known designated initializer.