关于UIImage的图片处理（截图，合并图片）

来源：互联网发布：工商网络监管工作总结编辑：程序博客网时间：2024/06/02 11:35

合并图片

- (UIImage *)addImage:(UIImage *)image1 toImage:(UIImage *)image2 {

CGSize size= CGSizeMake( image1.size.width,(int)v.scrollView.contentSize.height % (int)self.view.frame.size.height+image2.size.height);

UIGraphicsBeginImageContext(size);

// Draw image1

[image2 drawInRect:CGRectMake(0, (int)v.scrollView.contentSize.height % (int)self.view.frame.size.height, image2.size.width, image2.size.height)];

// Draw image2

[image1 drawInRect:CGRectMake(0, 0, image1.size.width, image1.size.height)];

UIImage *resultingImage = UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();

return resultingImage;

}

截图

- (UIImage *)imageFromView: (UIView *) theView atFrame:(CGRect)r

{

UIGraphicsBeginImageContext(theView.frame.size);

CGContextRef context = UIGraphicsGetCurrentContext();

CGContextSaveGState(context);

UIRectClip(r);

[theView.layer renderInContext:context];

UIImage *theImage = UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();

return theImage;//[self getImageAreaFromImage:theImage atFrame:r];

}

- (UIImage *)imageFromView: (UIScrollView*) theView

{

UIGraphicsBeginImageContext(theView.contentSize);

CGContextRef context = UIGraphicsGetCurrentContext();

[theView.layer renderInContext:context];

UIImage *theImage = UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();

return theImage;

}

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