UIView's designated initializers in swift
ios, swift
Solution
`init` is not a convenience initializer on UIView. `init` is not an initializer on UIView at all! It is an initializer on its superclass NSObject - UIView merely inherits it. And it is a designated initializer on NSObject. So when you implemented a designated initializer, you cut off inheritance of designated initializers - including `init`.
Problem
So I've subclassed `UIView` like so ``` class CustomView: UIView { } ``` And I could do something like ``` let customView = CustomView() ``` But when I override what I believe are the two designated initialisers for `UIView` i.e. `init(frame:)` and `init(coder:)` like so ``` class CustomView: UIView { required init(coder aDecoder: NSCoder) { super.init(coder: aDecoder) self.backgroundColor = UIColor.redColor() } override init(frame: CGRect) { super.init(frame: frame) self.backgroundColor = UIColor.redColor() } } ``` I can no longer create the view like so as it complains that `init()` no longer exists ``` let customView = CustomView() ``` My understanding is that If I override all the designated initialisers, I should inherit all the convenience initializers as well. So my question is. Is `init()` not a convenience initializer on UIView? Or is there another designated initializer on UIView that I haven't overrided yet?