UIView+Hierarchy

Today I came across a very handy category class, named UIView + Hierarchy. It provides some useful methods like below:

-(int)getSubviewIndex;
 
-(void)bringToFront;
-(void)sendToBack;
 
-(void)bringOneLevelUp;
-(void)sendOneLevelDown;
 
-(BOOL)isInFront;
-(BOOL)isAtBack;
 
-(void)swapDepthsWithView:(UIView*)swapView;

These aren't so hard to implement but having them in a category makes you have a cleaner code, since you encapsulate the hierarchy management in a category.

Here's a screenshot why I needed this: On the right hand side, there are two buttons (Program - Ziyaret Ozeti), that act like a folder cap. The active one should be one level up in the Z-order. When you deactivate it by selecting the other, then it should fall back one level and the other one should get in the front. Now it's so nice and easy :)

You can download the actual source from here