iOS截屏代码

所谓截屏就是把当前屏幕截取成一张图片

- (UIImage*)getScreenImage{

   

    CGSize imageSize = [[UIScreen mainScreen] bounds].size;

    UIGraphicsBeginImageContextWithOptions(imageSize, NO, 0);    

    

    CGContextRef context = UIGraphicsGetCurrentContext();

    

    for (UIWindow * window in [[UIApplication sharedApplication] windows]) {

        if (![window respondsToSelector:@selector(screen)] || [window screen] == [UIScreen mainScreen]) {

            CGContextSaveGState(context);

            CGContextTranslateCTM(context, [window center].x, [window center].y);

            CGContextConcatCTM(context, [window transform]);

            CGContextTranslateCTM(context, -[window bounds].size.width*[[window layer] anchorPoint].x, -[window bounds].size.height*[[window layer] anchorPoint].y);

            [[window layer] renderInContext:context];

            

            CGContextRestoreGState(context);

        }

    }

    

    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();

    

    UIGraphicsEndImageContext();

    return image;

}