application screenshot from code

gistfile1.m

#import <QuartzCore/QuartzCore.h>
- (UIImage*) buildImageFrom: (UIView*)view {
    UIGraphicsBeginImageContext(view .bounds.size);
    [view.layer renderInContext:UIGraphicsGetCurrentContext()];
    UIImage* viewImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return viewImage;
}