1 UIGraphicsBeginImageContext(self.view.bounds.size);// 设置上下文
2 
3 [self.view.layer renderInContext:UIGraphicsGetCurrentContext()];4 
5 UIImage *image=UIGraphicsGetImageFromCurrentImageContext();//从当前上下文中获取image
6 
7 UIGraphicsEndImageContext();//关闭上下文
8 
9 UIImageWriteToSavedPhotosAlbum(image,self, nil, nil);//存到相册