我正在尝试让“windowScriptObject”工作，这是我的 Objective-C 代码如下：
- (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');"];
}
上面的代码在我注入 JavaScript ( evaluateWebScript )时有效
这就是控制台输出的内容：
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
该命令有效，但是当我使用页面时它不起作用。
<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>
它认为“MyApp”是未定义的，有什么建议吗？
（顺便说一下，WebView没有连接到这个类，它只是委托）