How do I animate in/out a gaussian blur effect in iOS?

Question

For the whole iOS 7 feel, I want to apply a blur effect to a specific portion of the screen to obfuscate it, but I don\'t want to just throw the blur on instantly, I want to

Answer 1

I rarely suggest off the shelf solutions for coding problems. However, in this case, I would whole heartedly recommend LiveFrost. It's a really solid UIView subclass focused exclusively on replicating the popular iOS 7 gaussian blur effect.

I would also encourage you to read the author's blog regarding his design decisions for this class. I have done a lot of research specifically in this topic since the release of iOS 7, and I have literally ZERO COMPLAINTS about this code.

It even has blur animation out of the box! Good luck to you :)