我尝试使用此方法从UIWebView捕获图像,但图像仅包含屏幕的可见区域.如何捕获包含不可见区域的UIWebView的完整内容,即将整个网页合并为一个单独的图像？
-(UIImage*)captureScreen:(UIView*) viewToCapture{
UIGraphicsBeginImageContext(viewToCapture.bounds.size);
[viewToCapture.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return viewImage;
}
我能够捕获整个网页的屏幕截图(包括屏幕外的内容).这在模拟器上工作正常,但在设备上崩溃.请帮助我,检查下面的代码(browserView是UIWebview).
UIImage *screenImage=[[UIImage alloc] init];
UIScrollView *browserScrollableView=[[UIScrollView alloc] init];
browserScrollableView=browserView.scrollView;
UIGraphicsBeginImageContext(browserScrollableView.contentSize);
CGPoint savedContentOffset = browserScrollableView.contentOffset;
CGRect savedFrame = browserScrollableView.frame;
browserScrollableView.contentOffset = CGPointZero;
browserScrollableView.frame = CGRectMake(0, 0, browserScrollableView.contentSize.width, browserScrollableView.contentSize.height);
[browserScrollableView.layer renderInContext: UIGraphicsGetCurrentContext()];
screenImage = UIGraphicsGetImageFromCurrentImageContext();
browserScrollableView.contentOffset = savedContentOffset;
browserScrollableView.frame = savedFrame;
UIGraphicsEndImageContext();
NSLog(@"Captured image size is %f X %f",screenImage.size.width,screenImage.size.height);
UIImageWriteToSavedPhotosAlbum(screenImage, nil, nil, nil);