How to get the gaussian blur effect on a UIView in

问题:

Does anyone know how to achieve a gaussian blur effect on an UIView in iOS6? Similar to twitter's #music app when the filter menu is open. (the background under the menu becomes blurred)

回答1:

I wrote a library RWBlurPopover based on GPUImage that can achieve similar gaussian blur effect when presenting a popover. Supports both iPhone and iPad, and runs on iOS 5.1+.