Blurry Lock Screen Wallpaper Designer allow user to create stunning wallpapers within second by using their content. It has beautiful minimalist design and intuitive, simple controls. It is written in Objective C, uses Storyboard ( supports iOS8 ).
App Store Link : https://itunes.apple.com/us/artist/world-software/id506602825?mt=8
Download and play around before purchasing. You will be getting full source code with artwork exactly what you see on App Store.
For full explanation. Please refer to readme.pdf