public override void Show(MvvmCross.Core.ViewModels.MvxViewModelRequest request)
{
if (request.PresentationValues != null)
{
#region ClearStack
if (request.PresentationValues.ContainsKey(PresentationBundleFlagKeys.ClearStack))
{
//MasterNavigationController.PopToRootViewController(false);
var nextViewController = (UIViewController)ViewCreator.CreateView(request);
MasterNavigationController.PushViewController(nextViewController, true);
return;
}
#endregion
#region ShowBack
if (request.PresentationValues.ContainsKey(PresentationBundleFlagKeys.ShowBack))
{
var nextViewController = (UIViewController)ViewCreator.CreateView(request);
var currentViewController = MasterNavigationController.TopViewController;
bool animated = false;
while (!animated && currentViewController != null && currentViewController.GetType() != nextViewController.GetType())
{
if (MasterNavigationController.ViewControllers.Length > 1)
{
var backViewController = MasterNavigationController.ViewControllers[MasterNavigationController.ViewControllers.Length - 2];
if (backViewController.GetType() == nextViewController.GetType())
{
animated = true;
}
}
else
{
break;
}
MasterNavigationController.PopViewController(animated);
if (animated)
{
MemoryUtils.DelayReleaseObject(2000, currentViewController);
}
else
{
MemoryUtils.ReleaseObject(currentViewController);
}
currentViewController = MasterNavigationController.TopViewController;
}
if (MasterNavigationController.ViewControllers.Length <= 1)
{
MasterNavigationController.PushViewController(nextViewController, true);
}
return;
}
#endregion
#region CloseCurrentAndShow
if (request.PresentationValues.ContainsKey(PresentationBundleFlagKeys.CloseCurrentAndShow))
{
// let make a async task to remove current from history to not make UI flash
System.Threading.Tasks.Task.Run(async() =>
{
await System.Threading.Tasks.Task.Delay(1000);
if (closeViewController == null)
{
return;
}
MasterNavigationController.InvokeOnMainThread(async() =>
{
//wait for until top view controller is showed
while (closeViewController != MasterNavigationController.TopViewController)
{
await System.Threading.Tasks.Task.Delay(100);
}
int countVc = MasterNavigationController.ViewControllers.Length;
if (countVc > 1)
{
UIViewController releaseViewController = MasterNavigationController.ViewControllers[countVc - 2];
UIViewController[] newHistory = new UIViewController[countVc - 1];
for (int i = 0; i < countVc - 2; i++)
{
newHistory[i] = MasterNavigationController.ViewControllers[i];
}
newHistory[countVc - 2] = MasterNavigationController.ViewControllers[countVc - 1];
MasterNavigationController.ViewControllers = newHistory;
MemoryUtils.ReleaseObject(releaseViewController);
}
closeViewController = null;
});
});
}
#endregion
}
base.Show(request);
}