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我正在尝试捕获网页的完整图像..但它显示的是空白图像..

我应该怎么做才能获得完整的网页图像？

我试过了

CGSize overallSize = [WebPageImage sizeThatFits:CGSizeZero];
UIGraphicsBeginImageContext(WebPageImage.scrollView.contentSize);
WebPageImage.bounds = CGRectMake(0, 0, overallSize.width, overallSize.height);
while (WebPageImage.loading) {
    [NSThread sleepForTimeInterval:0.1];
}
UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();

dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT,(unsigned long)NULL), ^(void) {
    UIImageWriteToSavedPhotosAlbum(viewImage, self, @selector(image:didFinishSavingWithError:contextInfo:), nil);
});

请提出一些解决方案.. WebPageImage 是 UIWebView..

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4 回答 4

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UIGraphicsBeginImageContextWithOptions(WebPageImage.bounds.size, WebPageImage.opaque, 0.0);
[WebPageImage.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
于 2013-04-19T10:53:44.463 回答
1

根据您的需要使用此功能。下面的代码将为您提供整个网页的快照

- (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;
    aFrame.size.width   = [view sizeThatFits:[[UIScreen mainScreen] bounds].size].width;
    view.frame          = aFrame;

//     do image magic
    UIGraphicsBeginImageContext([view sizeThatFits:[[UIScreen mainScreen] bounds].size]);
    CGContextRef resizedContext = UIGraphicsGetCurrentContext();
    [self.thmbWebView.layer renderInContext:resizedContext];
    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

    // reset Frame of view to origin
    view.frame = tmpFrame;
    return image;
}
于 2013-05-30T05:07:52.020 回答
0

尝试这个：

[WebPageImage.layer renderInContext:UIGraphicsGetCurrentContext()];
image = UIGraphicsGetImageFromCurrentImageContext();
于 2013-04-19T10:54:13.447 回答
0

尝试用我的波纹管方法捕获该图像...

-(IBAction)captureScreen:(id)sender
{   
    UIGraphicsBeginImageContext(webview.frame.size);
    [webview.layer renderInContext:UIGraphicsGetCurrentContext()];
    UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    UIImageWriteToSavedPhotosAlbum(viewImage, nil, nil, nil);
}

另请参阅此链接中的另一个答案.. howe-to-capture-uiview-top-uiview

于 2013-04-19T11:07:26.147 回答