如何在rowselect委托方法的xamarin.ios中导航到viewcontroller

Question

我正在从Table View导航到View Controller，当我点击行时，我得到例外System.NullReferenceException has been thrown Object reference not set to an instance of an object

这是代码：

    UITableViewController _contact;

    public Contactlist(UITableViewController contact)
    {

      _contact=contact;

    }

public override void Row Selected (UITableView tableView, NSIndexPath indexPath)
{

   // Error System.NullReferenceException
   _contact.NavigationController.PushViewController(new incomingscreen(),true);

}

请帮助

Answer 1

除非ViewController包含在NavigationController中，否则ViewController的NavigationController属性将为null。

window.RootViewController = new UINavigationController(new MyTableViewController());