Menu
I am using a UIWebView to display HTML formatted text. I am not loading a webpage, just supplying a string of HTML to the UIWebView.
Now I want to animate this UIWebView on screen, actually several of them (2-10 at a time). UIWebView is a little heavy, and although I haven't attempted it yet, I am planning for the worst. (I don't think this is premature optimization, I 'm almost positive this will be an issue)
To get around the problem, I figured I could convert the contents of the UIWebViews to UIImages and animate them instead.
So, my questions are:
Thanks for any suggestions
825
UIImage contains the data for an image. UIImageView is a custom view meant to display the UIImage .
To clear old contents of webview With UIWebView you would use UIWebViewDelegate 's - webViewDidFinishLoad: .
For example: UIImage *img = [[UIImage alloc] init]; [img setImage:[UIImage imageNamed:@"anyImageName"]];
Deep copying UIImage *newImage = [UIImage imageWithData:UIImagePNGRepresentation(oldImage)]; This will copy the data but will require setting the orientation property before handing it to something like UIImageView for proper display. Another way to deep copy would be to draw into the context and grab the result.
UIGraphicsBeginImageContext(webview.bounds.size);
[webview.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
You might run into issues if the webview dimensions are large because the webview uses a CATiledLayer that doesn't draw everything for memory reasons.
The image will include transparency
114
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
