错误 CS1061：AppDelegate 不包含 GetNativeField 的定义

Question

我正在使用单点触控编写我的第一个 iPhone 应用程序。我只写了一点代码，突然，它不再编译了，我得到这个错误：

/MyRoute/MainWindow.xib.designer.cs(85,85): Error CS1061: Type xxxx.AppDelegate' does not contain a definition forGetNativeField' and no extension method GetNativeField' of typexxx.AppDelegate' 找不到（你是否缺少 using 指令或程序集参考？）（CS1061）（xxx）

知道这个错误来自哪里以及如何解决它吗？

谢谢！ :-D

已编辑：添加了附加信息：

这是主窗口设计师代码：

namespace GuiaTeleIphone {


    // Base type probably should be MonoTouch.Foundation.NSObject or subclass
    [MonoTouch.Foundation.Register("AppDelegate")]
    public partial class AppDelegate {

        private MonoTouch.UIKit.UIWindow __mt_window;

        #pragma warning disable 0169
        [MonoTouch.Foundation.Connect("window")]
        private MonoTouch.UIKit.UIWindow window {
            get {
                this.__mt_window = ((MonoTouch.UIKit.UIWindow)(this.GetNativeField("window")));
                return this.__mt_window;
            }
            set {
                this.__mt_window = value;
                this.SetNativeField("window", value);
            }
        }
    }
}

这是 MAIN.CS：

namespace GuiaTeleIphone
{
    public class Application
    {
        static void Main (string[] args)
        {
            UIApplication.Main (args);
        }
    }

    // The name AppDelegate is referenced in the MainWindow.xib file.
    public partial class AppDelegate : UIApplicationDelegate
    {
        List<RSSChannel> RemoteChannelsData;

        // This method is invoked when the application has loaded its UI and its ready to run
        public override bool FinishedLaunching (UIApplication app, NSDictionary options)
        {
            // If you have defined a view, add it here:
            // window.AddSubview (navigationController.View);

            window.MakeKeyAndVisible ();

                        // do things here

            return true;
        }

        }
}

Answer 1

xxxx.AppDelegate 的另一个部分类丢失或位于不同的命名空间中。它指定了基类。