Question

Like you can see in my code, I take a screenshot and save it to the photo album.

//for retina displays
if ([[UIScreen mainScreen] respondsToSelector:@selector(scale)]) {
    UIGraphicsBeginImageContextWithOptions(self.view.bounds.size, NO, [UIScreen mainScreen].scale);
} else {
    UIGraphicsBeginImageContext(self.view.bounds.size);
}
[self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
UIImageWriteToSavedPhotosAlbum(viewImage, nil, nil, nil);

At the beginning I used webview.size instead of self.view.bounds.size and it was working properly because the view was located at 0/0. But now I centered the WebView but the pictures is starts at 0/0 for the given size.

How can I configure that the screenshot starts at another location (e.g. 300/150) for the given size?

Or is there another way to take a picture of an UIWebView?

Answer 1

I solved my problem but didn’t answer the question:

I created a subclass of UIView and moved my UIWebView in there, so that it is located 0/0 relative to the subclass. Then use the size of the WebView:

UIGraphicsBeginImageContext(webview.frame.size);

and the other code from above.

Now you can move the subclass to every location you want.

Note: If you have labels like date/time label you have to move them too or you won’t see them on the picture.

So create a subclass of UIView and move every IBOutlet you want to be
seen on the picture in there.

The question is still open:
So is it possible to take a picture of a specific area of the screen?

Kind Regards. $h@rky