How to make a subview automatically resize with its superview?
I have a view which contains one sub-view; this sub-view itself contains another sub-view, which is meant to be slightly smaller than its superview.
I am creating the first subview full-screen size then shrinking it to a very small size on the screen. When the subview is tapped, I animat开发者_运维问答e it from its small size to full-screen.
The problem is that my second subview never resizes itself during this animation - it is always rendered full-size and overflows the bounds of its superview.
Is there a simple way to get a subview to keep itself sized proportionally as its superview changes size?
you could add the autoresizing-behavior programmatically
Objective-C
subview.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
Swift 3.x
subview.autoresizingMask = [.flexibleWidth, .flexibleHeight]
Swift 2.x
subview.autoresizingMask = [.FlexibleWidth, .FlexibleHeight]
In Interface-Builder navigate to tab 3 and click on the arrows in the middle ;D
Another workaround could be to implement the setFrame-method and always adapt it to the size of the superview (not the given frame.size). Don't forget to set up the origin as you need it.
- (void) setFrame:(CGRect)frame
{
CGRect rect = self.superview.frame;
rect.origin.x = 0;
rect.origin.y = 0;
[super setFrame:rect];
}
this does the trick for me
subview.frame = subview.superview.bounds;
If you're using only [.flexibleWidth, .flexibleHeight] for your autoresizing mask, your subview will not get resized proportionally. The right answer is:
autoresizingMask = [.flexibleWidth, .flexibleHeight, .flexibleTopMargin, .flexibleLeftMargin, .flexibleBottomMargin, .flexibleRightMargin]
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