当webview大于屏幕时,将UIWebview内容转换为UIImage [英] Convert UIWebview contents to a UIImage when the webview is larger than the screen
本文介绍了当webview大于屏幕时,将UIWebview内容转换为UIImage的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
非常类似于此问题(以及这个答案),我正试图从webview中取出UIImage。到目前为止,我正在使用答案中建议的代码,具体来说:
Very similar to this question (and also this answer), I'm trying to make an UIImage out from a webview. So far I'm using the code suggested in the answer, specifically:
UIGraphicsBeginImageContext(webview.bounds.size);
[webview.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
但是,当webview的内容大于屏幕时,生成的图像不完整,缺少补丁。关于如何解决这个问题的任何想法?
However, when the contents of the webview are larger than the screen, the resulting images are not complete and have missing patches. Any ideas on how to fix this?
推荐答案
我得到了答案:
您必须在创建图像之前将Webview的框架设置为完整的内容大小。之后只需将大小设置回原点:
You have to set the frame of the Webview to the full content size just before you create the image. After this just set the size back to origin:
+ (UIImage *) imageFromWebView:(UIWebView *)view
{
// tempframe to reset view size after image was created
CGRect tmpFrame = view.frame;
// set new Frame
CGRect aFrame = view.frame;
aFrame.size.height = [view sizeThatFits:[[UIScreen mainScreen] bounds].size].height;
view.frame = aFrame;
// do image magic
UIGraphicsBeginImageContext([view sizeThatFits:[[UIScreen mainScreen] bounds].size]);
CGContextRef resizedContext = UIGraphicsGetCurrentContext();
[view.layer renderInContext:resizedContext];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
// reset Frame of view to origin
view.frame = tmpFrame;
return image;
}
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