guru78 / split-vc-blur

Example showing how to mimic blur effect in iOS 7 with UISplitViewController

split-vc-blur

This is an example showing how to mimic blur effects in iOS 7 with UISplitViewController. This example is optimized to render blur effects quickly with reasonable quality.

The blur effect code is based on code provided by Apple at WWDC 2013. You can download the code for the blur effect from:

https://developer.apple.com/downloads/index.action?name=WWDC%202013

Note that you will need a developer account to access this content. Look for iOS_UIImageEffects to get a package with Apple's example.

To make the blur effect performant, the code reduces the size of the snapshots it takes of the content view. This speeds up the blur convolution considerably. The smaller image size does not degrade image quality since the blur radius is set to a high value and one cannot see pixelation when the image is stretched to a larger size.

This example also shows a slow implementation of the blur effect that captures large screenshots and runs multiple passes of a box blur filter. The slow implementation is contained in a branch named 'slowImplementation'

To access the slow implementation, checkout the slowImplementation branch:

git checkout slowImplementation

The optimized version is in the master branch:

git checkout master