Re: [webkit-dev] Javascript / Obj-c object property mismatch

[Timothy Hatcher]

A _javascript_ property is not the same as an element attribute. It is unfortunate that some attributes like "onclick" get mapped from attributes to properties, but this is a special case for compatibility. But if you later change the onclick property the attribute doesn't change. The equivalent of 'myObject.command = value' in ObjC is '[myObject setValue:value forKey:@"command"]'. Then the matching call '[myObject valueForKey:@"command"]' to get the value back. _javascript_ has the same setAttribute and getAttribute methods if you do want to change an attribute. Hope this helps. — Timothy Hatcher On Oct 26, 2006, at 8:47 AM, Rudi Sherry wrote: I'm working with a WebView where I use DOM object manipulation in objective-c combined with _javascript_. I have the dom document and I add an object with some attributes like this: DOMNodeList *list = [ domDoc getElementsByTagName: @"BODY" ]; DOMNode *body = [ list item: 0 ]; myObject = (DOMHTMLObjectElement *) [ [ domDoc createElement: @"OBJECT" ] retain ]; [ myObject setAttribute: @"ID" : @"MyObjectName" ]; [ myObject setAttribute: @"NAME" : @"MyObjectName" ]; <snip> [ myObject setAttribute: @"command" : @"xxx" ]; [ body appendChild: myObject ]; In the _javascript_, I can get the object with this and check its value (this is in a _javascript_ function that gets called): var myObject = document.body.children['MyObjectName']; alert(myObject.command); myObject.command = "abcdef"; alert(myObject.command); I have a WebUIDelegate with the runJavaScriptAlertPanelWithMessage that prints out the alert value and compares it against myObject: - (void)webView:(WebView *)sender runJavaScriptAlertPanelWithMessage:(NSString *)message { NSLog (@"alert: %@", message); NSLog( @"command attribute: %@", [ mSwfObject getAttribute: @"command" ] ); } In the above example, it prints out: 2006-10-26 08:44:29.771 TestInsideWebKit[9235] alert: xxx 2006-10-26 08:44:29.771 TestInsideWebKit[9235] command attribute: xxx 2006-10-26 08:44:29.771 TestInsideWebKit[9235] alert: abcdef 2006-10-26 08:44:29.771 TestInsideWebKit[9235] command attribute: xxx Why isn't the command attribute changed in the objective-c object when it's changed in the _javascript_ function?  It must be the same object since it started as 'xxx'. Any help would be appreciated, Thanks, Rudi _______________________________________________ webkit-dev mailing list webkit-dev@opendarwin.org http://www.opendarwin.org/mailman/listinfo/webkit-dev

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