Is there a UIView resize event?

Question

I have a view that has rows and columns of imageviews in it.

If this view is resized, I need to rearrange the imageviews positions.

This view is a subview of another view that gets resized.

Is there a way to detect when this view is being resized?

Answer 1

You can use key-value observing:

[yourView addObserver:self forKeyPath:@"bounds" options:0 context:nil];

and implement:

- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context
{
    if (object == yourView && [keyPath isEqualToString:@"bounds"]) {
        // do your stuff, or better schedule to run later using performSelector:withObject:afterDuration:
    }
}