#import <QuartzCore/QuartzCore.h>
UIImage* layerImage = nil;
CGSize layerSize = self.contentScrollView.frame.size;
UIGraphicsBeginImageContextWithOptions(layerSize, NO, 2.0);
[self.contentScrollView.layer renderInContext:UIGraphicsGetCurrentContext()];
layerImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
UIImageWriteToSavedPhotosAlbum(layerImage, nil, nil, nil);