不符合键值编码(Monotouch和iOS 6)

Question

我刚刚将Monotouch升级到6,现在我的应用程序无法启动.它以前没有任何问题.现在它在Main.cs文件中抛出一个异常(如下所示).我已经查看了有关Xamarin的疑难解答提示,但它没有解决问题.我重新布置了nib文件,删除并重新配置了我的插座,并创建了一个全新的笔尖,看看是否可以解决问题.有没有人有任何想法？

MonoTouch.Foundation.MonoTouchException: Objective-C exception thrown.  Name: NSUnknownKeyException Reason: [<UIApplication 0xc84bb10> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key btnNewAccount.
   at (wrapper managed-to-native) MonoTouch.UIKit.UIApplication:UIApplicationMain (int,string[],intptr,intptr)
   at MonoTouch.UIKit.UIApplication.Main (System.String[] args, System.String principalClassName, System.String delegateClassName) [0x0004c] in /Developer/MonoTouch/Source/monotouch/src/UIKit/UIApplication.cs:38
   at Pokr.Application.Main (System.String[] args) [0x00000] in /Users/James/Projects/App/Main.cs:17

LoginView.designer.cs中的代码:

[Register ("LoginView")]
partial class LoginView
{
    [Outlet]
    MonoTouch.UIKit.UIImageView imgLogo { get; set; }

    [Outlet]
    MonoTouch.UIKit.UITextField txtEmail { get; set; }

    [Outlet]
    MonoTouch.UIKit.UITextField txtPassword { get; set; }

    [Outlet]
    MonoTouch.UIKit.UIButton btnLogin { get; set; }

    [Outlet]
    MonoTouch.UIKit.UIButton btnNewAccount { get; set; }

    [Outlet]
    MonoTouch.UIKit.UILabel lblSecurityNotice { get; set; }

    [Outlet]
    MonoTouch.UIKit.UIImageView imgKeyboardBorder { get; set; }

    void ReleaseDesignerOutlets ()
    {
        if (imgLogo != null) {
            imgLogo.Dispose ();
            imgLogo = null;
        }

        if (txtEmail != null) {
            txtEmail.Dispose ();
            txtEmail = null;
        }

        if (txtPassword != null) {
            txtPassword.Dispose ();
            txtPassword = null;
        }

        if (btnLogin != null) {
            btnLogin.Dispose ();
            btnLogin = null;
        }

        if (btnNewAccount != null) {
            btnNewAccount.Dispose ();
            btnNewAccount = null;
        }

        if (lblSecurityNotice != null) {
            lblSecurityNotice.Dispose ();
            lblSecurityNotice = null;
        }

        if (imgKeyboardBorder != null) {
            imgKeyboardBorder.Dispose ();
            imgKeyboardBorder = null;
        }
    }

来自Main.cs的代码(代码中断的地方):

    static void Main (string[] args)
    {
        UIApplication.Main (args, null, "AppDelegate");
    }

这是我的AppDelegate的片段,我调用了ViewController:

        var rootNavigationController = new UINavigationController();

        LoginView loginScreen = new LoginView();
        rootNavigationController.PushViewController(loginScreen, false);

        this.window.RootViewController = rootNavigationController;

        //blank function fires so the getter will init the singleton.
        Singleton.Instance.Initialize();

        // make the window visible
        window.MakeKeyAndVisible ();


        return true;

Answer 1

初始化ViewControllerin代码但也ViewController从XIB文件初始化时,会发生此错误.

如果您将"主界面"值设置为ViewController您在代码中创建的值,则可能会发生这种情况.要解决此问题,请将此值ViewController设为空,然后不会自动初始化.

还要检查pInfo文件以查看是否有主界面设置.

感谢@Bart为Xamarin用户提供此提示:

右键单击Xamarin Studio中的项目(v.4)选择'Options',然后在'iOS Project'(部分'iPad Deployment info')下.清除下拉列表'Main Interface',这应该可以解决问题.