How to change size of UIButton

Question

I'm trying to resize a UIButton in my iPhone app. I have a UIButton synthesized and when I call the following code, it moves on the screen, but the width & height of the button never change.

button.frame.size = CGRectMake(104, 68, 158, 70);

For example, when I change the height (70) to 40, the height of the button does not change. If I change the x or y, however, it will move on the screen.

Any ideas?

Answer 1

I believe you can just adjust the UIButton's frame to adjust the dem.

Answer 2

The code above should not compile; you're trying to assign a CGRect to a CGSize. The problem comes in the misleading nature of properties. What you're doing above is akin to this:

[button frame].size = CGSizeMake(150, 70);

Obviously, this won't actually change the size. What you need to do is grab the frame (or bounds), modify it, and then set it. Try this:

CGRect      buttonFrame = button.frame;
buttonFrame.size = CGSizeMake(150, 70);
button.frame = buttonFrame;

Answer 3

You MUST call [view setNeedsLayout] on the view where the button is placed.

buttonIBOutlet.frame = CGRectMake(104, 68, 158, 70);
[delegate.window setNeedsLayout];