UIImage+BlurredFrame is a UIImage category that blurs an specified frame of a UIImage
#Install
Install with cocoapods
pod 'UIImage+BlurredFrame'
#Usage
UIImage *img = [UIImage imageNamed:@"myImage"];
CGRect frame = CGRectMake(0, img.size.height - 200, img.size.width, img.size.height - 200);
img = [img applyLightEffectAtFrame:frame];
##Credits
UIImage+ImageEffects category taken from the 2013 wwdc developer
videos 'Implementing Engaging UI on iOS'
Methods to crop and merge images from this stackoverflow answer
Adrián González