Most stable way to handle resizing of UIView?

Question

There are many geometric related properties on UIView.

frame
bounds
transform

Maybe more.

If I want to execute some behavior when the view is resized, what should I do?

I usually tried overriding -layoutSubviews method, but it also be called by non-resizing event. Even I override all of the properties, I still can't sure I have handled all of possibilities.

What's most stable and recommended way to handle resize event?

score 3 · Answer 1 · answered Dec 21 '14 at 15:42

3

In Swift, you can do:

override var bounds: CGRect {
    didSet {
        // Do stuff here
    }
}

answered Dec 21 '14 at 15:42

Rudolf Adamkovič

31,030
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score 2 · Answer 2 · answered Apr 20 '12 at 09:40

2

I usually don't override layoutSubviews for resize, exactly because of what you said. I write my own layoutSubviewz and call it whenever it's needed, e.g. I override setFrame like this:

-(void)setFrame:(CGRect)frame
{
  [super setFrame:frame];
  [self layoutSubviewz];
}

answered Apr 20 '12 at 09:40

Kai Huppmann

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I used this in Xamarin: public override CGRect Frame { get { return base.Frame; } set { MyCustomMethod(value); base.Frame = value; } } – pauldendulk Feb 14 '17 at 19:38

Most stable way to handle resizing of UIView?

2 Answers2