In apple documentation
setAnimationRepeatAutoreverses:
Sets whether the animation of property changes within an animation block automatically reverses repeatedly.
Use of this method is discouraged in iOS 4.0 and later. You should use the block-based animation methods instead.
They mentioned like this… But my app supports from 3.0 or later. Do i need to use two separate codes( one for 3.0 and blocks above 4.0). How to accomplish this?
You can keep using your existing code. It will continue to work; they would just prefer you to use newer APIs if you can (which, as you’ve said, you can’t yet.)