MvxTabBarViewController标签栏色调颜色

Question

I am trying to find a way to change the tab bar tint color when using MvxTabBarViewController. This does not work:

public override void ViewDidLoad()
    {
        base.ViewDidLoad();

        // ios7 layout
        if (RespondsToSelector(new Selector("edgesForExtendedLayout")))
            EdgesForExtendedLayout = UIRectEdge.None;

        if (ViewModel == null)
            return;

        var viewControllers = new UIViewController[]
                              {
                                CreateTabFor(ViewModel["Today"], "icon1", ViewModel.TodaysExercisesView),
                                CreateTabFor(ViewModel["Exercises"], "icon2", ViewModel.ExercisesView),
                                CreateTabFor(ViewModel["Progress"], "icon3", ViewModel.ProgressView)
                              };
        ViewControllers = viewControllers;
        CustomizableViewControllers = new UIViewController[] { };
        SelectedViewController = ViewControllers[0];

        // Causes null reference error
        this.TabBarController.TabBar.TintColor = UIColor.Blue;

    }

What would be the correct way to do this? (Edited. Original question was about navigation bar tint as opposed to tab bar, which I actually meant)

Answer 1

Found the solution.

UITabBar.Appearance.BarTintColor = UIColor.Blue;

This changes the style globally, which is what I wanted. The code can placed in ViewDidLoad or apparently elsewhere.

More info on Appearance API on Xamarin documentation here: http://developer.xamarin.com/guides/ios/user_interface/introduction_to_the_appearance_api/

Answer 2

You can use this in ViewDidLoad() without any issues:

this.TabBar.TintColor = UIColor.Blue;

This also gives you individual control, rather than a global setting.