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When embedding WebView in an application and loading html-pages in it, JavaScripts alert()/confirm()/etc. do not work.

Looking around in the documentation, there are no related settings in WebPreferences - the only thing that looks related are WebUIDelegates -(void)webView:runJavaScriptAlertPanelWithMessage:initiatedByFrame: etc ... but implementing these would mean writing custom dialogs for these which seems pretty redundant...
I don't need a custom WebUIDelegate and would like to continue just using the default one.

Surely there has to be some way to simply enable alert() et al, but how?

Georg Fritzsche
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  • The documentation for that delegate method says "No action is taken if you do not implement this method", so it seems like you've answered your own question. – smorgan Jan 20 '10 at 14:34
  • I interpret that as *"No action is taken if you set a custom WebUIDelegate which does not implement this method"* - ideally i don't even want to set my own `WebUIDelegate`. – Georg Fritzsche Jan 20 '10 at 14:38

2 Answers2

12

Here is a sample code that will do the basic job. You need however to make sure that this object is registered as a UIDelegate for the WebView.

- (void)webView:(WebView *)sender runJavaScriptAlertPanelWithMessage:(NSString *)message initiatedByFrame:(WebFrame *)frame {
    NSAlert *alert = [[NSAlert alloc] init];
    [alert addButtonWithTitle:@"OK"];
    [alert setMessageText:message];
    [alert runModal];
    [alert release];
}
RedMitch
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  • "You need however to make sure that this object is registered as a UIDelegate for the WebView." That little blurb saved my evening. Thanks. – byron Sep 07 '11 at 05:16
5

It turns out there is simply no default WebUIDelegate set - Apple seems to expect everyone to implement the same basic features for themselves.

Georg Fritzsche
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