How to get the gaussian blur effect on a UIView in iOS6

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+.

来源：https://stackoverflow.com/questions/16182788/how-to-get-the-gaussian-blur-effect-on-a-uiview-in-ios6