How do I do KVO for the bounds of a subview? I know I should go for the layer, but how do I get to the subview?
Lets use this example:
UIView *childView [[UIView allow] init]; [self.view addSubview:childView];
Should I start with "[self.view.layer addObserver..." and then make some magic in the keypath?
In general UIKit objects do not support KVO. Unless a class is documented as supporting KVO, you should assume it does not (even if it appears to work – there are likely edge cases that you haven't noticed).