没有在MacOS webview截图中获取所有内容

Question

wI am trying to capture a screenshot of a cocoa webview using this code:

NSBitmapImageRep *bitmapRepRight = [[webView mainFrame].frameView bitmapImageRepForCachingDisplayInRect:cacheRect];

[[[webView mainFrame].frameView  documentView] layout];

[[webView mainFrame].frameView cacheDisplayInRect:cacheRect toBitmapImageRep:bitmapRepRight];

return [bitmapRepRight CGImage];

This code is called from the - (void)webView:(WebView *)sender didFinishLoadForFrame:(WebFrame *)frame function.

I am only getting the background of the page but no text neither images.

If I call it using [self performSelector:@selector(addPagesToCache) withObject:nil afterDelay:0.01]; then it works but this is not a clean way at all.

What could be the issue and how can I fix it?

Answer 1

If your webview is visible (in a window), you could use CGWindowListCreateImage to take a partial image of the window. This is also a workaround, not a perfect solution.