将一个UIView对象的内容保存为UIImage

+ (UIImage*)imageFromView:(UIView*)view{   

02     

03 UIGraphicsBeginImageContextWithOptions(view.bounds.size, YES, view.layer.contentsScale);   

04     

05 [view.layer renderInContext:UIGraphicsGetCurrentContext()];   

06     

07 UIImage *image = UIGraphicsGetImageFromCurrentImageContext();   

08     

09 UIGraphicsEndImageContext();   

10     

11 return image;   

12     

13 }