[objc] view plaincopy    // 从view上截图      - (UIImage *)getImage {                    UIGraphicsBeginImageContextWithOptions(CGSizeMake(150, 150), NO, 1.0);  //NO，YES 控制是否透明          [self.view.layer renderInContext:UIGraphicsGetCurrentContext()];          UIImage *image = UIGraphicsGetImageFromCurrentImageContext();          UIGraphicsEndImageContext();          // 生成后的image                    return image;      }            // 根据给定得图片，从其指定区域截取一张新得图片      -(UIImage *)getImageFromImage{          //大图bigImage          //定义myImageRect，截图的区域          CGRect myImageRect = CGRectMake(70, 10, 150, 150);          UIImage* bigImage= [UIImage imageNamed:@"mm.jpg"];          CGImageRef imageRef = bigImage.CGImage;          CGImageRef subImageRef = CGImageCreateWithImageInRect(imageRef, myImageRect);          CGSize size;          size.width = 150;          size.height = 150;          UIGraphicsBeginImageContext(size);          CGContextRef context = UIGraphicsGetCurrentContext();          CGContextDrawImage(context, myImageRect, subImageRef);          UIImage* smallImage = [UIImage imageWithCGImage:subImageRef];          UIGraphicsEndImageContext();          return smallImage;      }