按照這里的例子：JSContext我收到以下異常：{TypeError: myCSharpObject.myFunc is not a function. (In 'myCSharpObject.myFunc()', 'myCSharpObject.myFunc' is undefined)} 我的代碼如下：        JSContext _context;        _context = new JSContext();        var jsCallback = new MyJSExporter();        _context[(NSString)"myCSharpObject"] = JSValue.From(jsCallback, _context);        var result = _context.EvaluateScript("myCSharpObject.myFunc();");協(xié)議定義為：[Protocol]    interface IMyJSVisibleProtocol : IJSExport    {        [Export("myFunc")]        int MyFunc();        [Export("Arity2:With:")]        NSObject Arity2With(NSObject arg1, NSObject arg2);    }    class MyJSExporter : NSObject, IMyJSVisibleProtocol    {        public int MyFunc()        {            Console.WriteLine("Called!");            return 42;        }        public NSObject Arity2With(NSObject arg1, NSObject arg2)        {            Console.WriteLine("Arity 2 function called with " + arg1 + " " + arg2);            return (NSNumber)42;        }    }異常處理程序?yàn)椋?nbsp;      _context.ExceptionHandler = (context, exception) => {            // {TypeError: myCSharpObject.myFunc is not a function. (In 'myCSharpObject.myFunc()', 'myCSharpObject.myFunc' is undefined)}        };