public override void ShowTabView(UIViewController viewController, MvxTabPresentationAttribute attribute)
{
System.Type vcType;
if (viewController is UINavigationController)
{
vcType = viewController.ChildViewControllers[0].GetType();
}
else
{
vcType = viewController.GetType();
}
var existingVc = ChildViewControllers.FirstOrDefault(x =>
{
if (x is UINavigationController)
{
return(x.ChildViewControllers[0].GetType() == vcType);
}
else
{
return(x.GetType() == vcType);
}
});
if (existingVc != null && ChildViewControllers != null)
{
SelectedIndex = Array.IndexOf(ChildViewControllers, existingVc);
}
else
{
base.ShowTabView(viewController, attribute);
}
}
public void SetViewController(UIViewController vc, bool animated)
{
//dont activate new vc instance of same type
var target = ChildViewControllers.FirstOrDefault();
if (target != null)
{
if (target.GetType() == vc.GetType())
{
return;
}
}
vc.View.TranslatesAutoresizingMaskIntoConstraints = false;
if (animated)
{
UIView.Transition(View, 1.0, UIViewAnimationOptions.CurveEaseOut, () =>
{
View.Subviews?.ToList().ForEach(p => p.RemoveFromSuperview());
ChildViewControllers?.ToList().ForEach(p => p.RemoveFromParentViewController());
AddChildViewController(vc);
View.AddSubview(vc.View);
View.AddConstraint(NSLayoutConstraint.Create(vc.View, NSLayoutAttribute.Top, NSLayoutRelation.Equal, View, NSLayoutAttribute.Top, 1, 0));
View.AddConstraint(NSLayoutConstraint.Create(vc.View, NSLayoutAttribute.Right, NSLayoutRelation.Equal, View, NSLayoutAttribute.Right, 1, 0));
View.AddConstraint(NSLayoutConstraint.Create(vc.View, NSLayoutAttribute.Bottom, NSLayoutRelation.Equal, View, NSLayoutAttribute.Bottom, 1, 0));
View.AddConstraint(NSLayoutConstraint.Create(vc.View, NSLayoutAttribute.Left, NSLayoutRelation.Equal, View, NSLayoutAttribute.Left, 1, 0));
}, null);
}
else
{
View.Subviews?.ToList().ForEach(p => p.RemoveFromSuperview());
ChildViewControllers?.ToList().ForEach(p => p.RemoveFromParentViewController());
AddChildViewController(vc);
View.AddSubview(vc.View);
View.AddConstraint(NSLayoutConstraint.Create(vc.View, NSLayoutAttribute.Top, NSLayoutRelation.Equal, View, NSLayoutAttribute.Top, 1, 0));
View.AddConstraint(NSLayoutConstraint.Create(vc.View, NSLayoutAttribute.Right, NSLayoutRelation.Equal, View, NSLayoutAttribute.Right, 1, 0));
View.AddConstraint(NSLayoutConstraint.Create(vc.View, NSLayoutAttribute.Bottom, NSLayoutRelation.Equal, View, NSLayoutAttribute.Bottom, 1, 0));
View.AddConstraint(NSLayoutConstraint.Create(vc.View, NSLayoutAttribute.Left, NSLayoutRelation.Equal, View, NSLayoutAttribute.Left, 1, 0));
}
ActiveViewController = vc;
}
