Question

How can I write a function that will take either a UIView or a UIButton as a parameter.

For example, let’s say I wanted to round the corners the View/Button:

[self roundCorners:x]

How could I make that accept both a UIButton object or a UIView object as x?

My first thoughts were use id or NSObject, but I don’t think that is correct:

-(void)roundCorners:(id)objectToRound;

Answer 1

UIButton is a subclass of UIView, so your method will take either one if you declare it this way:

- (void)roundCorners:(UIView *)objectToRound;