在Navbar bug

Question

我正在通过依赖服务使用Xamarin Auth，它提供了一个用户身份验证的新视图但是，当模态页面出现并且完全可见时，它会上下跳动，显示此黑条 它很快消失，页面加载如下：隐藏页面顶部。提前致谢

我尝试了以下内容：

        UIWindow window = UIApplication.SharedApplication.KeyWindow;
        UIViewController viewController = window.RootViewController;
        UIViewController AuthVC = auth.GetUI();

        AuthVC.EdgesForExtendedLayout = UIRectEdge.None;
        AuthVC.ExtendedLayoutIncludesOpaqueBars = false;
        AuthVC.AutomaticallyAdjustsScrollViewInsets = false;

        viewController.EdgesForExtendedLayout = UIRectEdge.None;
        viewController.ExtendedLayoutIncludesOpaqueBars = false;
        viewController.AutomaticallyAdjustsScrollViewInsets = false;

        viewController.PresentViewController(AuthVC, true, null);

来自Auth.GetUI（）的UIViewController来自这个包：https://github.com/xamarin/Xamarin.Auth

Answer 1

这是我的临时解决方案，它仍然会闪烁，但如果加载后看起来是正确的。有谁知道什么会导致黑条闪烁？

viewController.PresentViewController(AuthVC, true, new Action(() =>
{
    var MainUIView = AuthVC.View.Subviews[0];
    var MainNavBar = AuthVC.View.Subviews[1];
    var NavBarHeight = MainNavBar.Frame.Y + MainNavBar.Frame.Height;
    MainUIView.Frame = new CoreGraphics.CGRect(0, NavBarHeight, MainUIView.Frame.Width, MainUIView.Frame.Height - NavBarHeight);
}));

Answer 2

试试这个

viewController.NavigationController.PresentViewController(AuthVC, true, new Action(() =>
{
    var MainUIView = AuthVC.View.Subviews[0];
    var MainNavBar = AuthVC.View.Subviews[1];
    var NavBarHeight = MainNavBar.Frame.Y + MainNavBar.Frame.Height;
    MainUIView.Frame = new CoreGraphics.CGRect(0, NavBarHeight, MainUIView.Frame.Width, MainUIView.Frame.Height - NavBarHeight);
}));