I am trying to get a ‘windowScriptObject’ working, this is my Objective-C code below:
- (void)consoleLog:(NSString *)aMessage {
NSLog(@"JSLog: %@", aMessage); }
+ (BOOL)isSelectorExcludedFromWebScript:(SEL)aSelector {
if (aSelector == @selector(consoleLog:)) {
return NO;
}
return YES; }
- (void)webView:(WebView *)sender didFinishLoadForFrame:(WebFrame *)frame {
NSLog(@"Did finnish load...");
scriptObject = [sender windowScriptObject];
//obviously, this returns undefined
NSLog(@"Object: %@",[scriptObject evaluateWebScript:@"MyApp"]);
//set the value of MyApp
[scriptObject setValue:self forKey:@"MyApp"];
//this now returns the value
NSLog(@"Object: %@",[scriptObject evaluateWebScript:@"MyApp"]);
//this command now works from here
[scriptObject evaluateWebScript:@"MyApp.consoleLog_('Test');"];
}
The above code works when I inject JavaScript (evaluateWebScript)
This sis what the console out put is:
2012-12-06 08:03:05.605 BetterDesktop[8669:303] Did finnish load...
2012-12-06 08:03:05.605 BetterDesktop[8669:303] Object: undefined
2012-12-06 08:03:05.606 BetterDesktop[8669:303] Object: <WidgetsDelegate: 0x10133de60>
2012-12-06 08:03:05.607 BetterDesktop[8669:303] JSLog: Test
The command works, however when I use a page it doesn’t work.
<html>
<head>
<script type="text/javascript">
if (typeof(MyApp) != "undefined"){
document.write('<br/><h1>hi</h1>');
MyApp.consoleLog_('Test from HTML');
}
else{
document.write('<br/><h1>Not Defined</h1>');
}
</script>
</head>
<body>
</body>
</html>
It believes that ‘MyApp’ is undefined, any suggestions?
(By the way, the WebView is not connected to this class, it is just the delegate)
You should inject your objects in to the WebView from within the
-webView:didClearWindowObject:forFrame:WebFrameLoadDelegatemethod rather than within-webView:didFinishLoadForFrame:. Thewindowobject is not guaranteed to have been correctly initialized untildidClearWindowObjectis called.