How to programmatically change UIView's frame inside an UIView Subclass?

Question

I have a UICustomButton(subclass of UIButton) in the interface builder. I want change this button's frame inside UICustomButton.

I tried following code:

// make it 10 points wider and higher
CGRect newFrame = CGRectMake(self.frame.origin.x, self.frame.origin.y, self.frame.size.width + 10, self.frame.size.height + 10);
self.frame = newFrame;

in awakeFromNib:, drawRect:

none of them worked, the result is unchanged.

Answer 1

Neither awakeFromNib nor drawRect: is appropriate.

You can change its frame in layoutSubviews , but you might run into trouble if your app uses auto layout.

Answer 2

Don't do that! That's bad architecture!

A view should never change it's own frame. It's always the parent view resizing its children. If you detect you need another frame inside your view: send out a delegate call to the parent view and change the frame in there. the delegate method could look like this

- customButton:(UIButton *)button requestNewFrame:(CGRect)frame
{
    button.frame = newFrame;
    // some storing method so you remember the frame on rotations and stuff
}

Just as a reminder: child views are always resized in

- (void)layoutSubviews //UIView
- (void)viewDidLayoutSubviews //UIViewController

That makes your code safe for different UIInterfaceOrientations and different devices.

Answer 3

I'd put it in viewDidLoad. If you put it in a recurring method, it will increase in size each time it's called.