UIWebView - How to identify the "last" webViewDidFinishLoad message?

Question

The webViewDidFinishLoad message seems to be sent each time any object in the page has been loaded. Is there a way to determine that all loading of content is done?

Answer 1

Interesting, I wouldn't have thought it would work like that. Although I'm sure there are other ways to do it (is there a way to extract the URL from the webViewDidFinishLoad message so that you can see which one is the main page finishing loading?), the main thing I can think of is using the estimatedProgress to check the progress of the page and fire off whatever you want to do when it's 100% finished loading, which is what I do in my app. Google "iphone webview estimatedprogress" and click the first link for a guide I wrote on how to do this.

Answer 2

The way I do it is this:

- (void)webViewDidFinishLoad:(UIWebView *)webview  {
    if (webview.loading)
    return;
    // now really done loading code goes next
    [logic]
}

Answer 3

I'm guessing that iframes cause the webViewDidStartLoad / webViewDidFinishLoad pair.

The [webView isLoading] check mentioned as an answer didn't work for me; it returned false even after the first of two webViewDidFinishLoad calls. Instead, I keep track of the loading as follows:

- (void)webViewDidStartLoad:(UIWebView *)webView {
  webViewLoads_++;
}


- (void)webViewDidFinishLoad:(UIWebView *)webView {
  webViewLoads_--;

  if (webViewLoads_ > 0) {
    return;
  }

  …
}

(Note this will only work if the start / finished pairs don't come serially, but in my experience so far that hasn't happened.)