UIEdgeInsets
A common task for UIKit devs: Inset a CGRect by an amount from each edge:
UIEdgeInsetsInsetRect(rect,insets);
And to do that in one line of course the constructor of UIEdgeInsets
UIEdgeInsetsMake(top,left,bottom,right);
Why on earth they decided to make the order of insets the other way round as CSS will remain a mysterie. Also note that a negative inset expands towards this edge. E.g.
UIEdgeInsetsInsetRect(CGRectMake(0,0,100,100), UIEdgeInsetsMake(10,10,-50,50));
results in the following CGRect: {10,10,140,40}
