public UIViewController GetPreviousViewController(UIPageViewController pageViewController, UIViewController referenceViewController)
{
var index = ViewControllers.IndexOf(referenceViewController) - 1;
if (index < 0)
{
return(null);
}
return(ViewControllers[index]);
}
public nfloat OffsetForChild(UIViewController viewController)
{
var index = ViewControllers.IndexOf(viewController);
if (index > -1)
{
throw new ViewControllerNotContainedInPagerTabStrip();
}
return(OffsetForChild(index));
}
public UIViewController GetNextViewController(UIPageViewController pageViewController, UIViewController referenceViewController)
{
var index = ViewControllers.IndexOf(referenceViewController) + 1;
if (index == ViewControllers.Count)
{
return(null);
}
return(ViewControllers[index]);
}
void InsertPageBefore(Page page, Page before)
{
if (before == null)
throw new ArgumentNullException("before");
if (page == null)
throw new ArgumentNullException("page");
var pageContainer = CreateViewControllerForPage(page);
var target = Platform.GetRenderer(before).ViewController.ParentViewController;
ViewControllers = ViewControllers.Insert(ViewControllers.IndexOf(target), pageContainer);
}
void HandlePageViewControllerDidFinishAnimating(object sender, UIPageViewFinishedAnimationEventArgs e)
{
if (pageViewController.ViewControllers.Length == 0)
{
return;
}
SelectedViewController = pageViewController.ViewControllers[0];
var index = ViewControllers.IndexOf(SelectedViewController);
TabBar.SelectedIndex = index;
lastSelectedIndex = index;
}
public new UIViewController GetNextViewController(UIPageViewController pageViewController, UIViewController referenceViewController)
{
var index = ViewControllers.IndexOf(referenceViewController) + 1;
//in the source, it is if (index == ViewControllers.Count) return null;
//change here to if (index == ViewControllers.Count || index == 1) will fix the first tab
if (index == ViewControllers.Count || index == 1)
{
return(null);
}
return(ViewControllers[index]);
}
public new UIViewController GetPreviousViewController(UIPageViewController pageViewController, UIViewController referenceViewController)
{
var index = ViewControllers.IndexOf(referenceViewController) - 1;
//in the source, it is if (index < 0) return null;
//change here to if (index < 1) will fix the first tab
if (index < 1)
{
return(null);
}
return(ViewControllers[index]);
}
protected virtual void OnInsertRequested(NavigationRequestedEventArgs e)
{
var page = e.Page;
var before = e.BeforePage;
var beforeRenderer = Platform.GetRenderer(before);
var renderer = Platform.CreateRenderer(page);
Platform.SetRenderer(page, renderer);
var tracker = _context.CreatePageRendererTracker();
tracker.ViewController = renderer.ViewController;
tracker.Page = page;
_trackers[page] = tracker;
ViewControllers.Insert(ViewControllers.IndexOf(beforeRenderer.ViewController), renderer.ViewController);
}
public void MoveTo(UIViewController viewController, bool animated = true)
{
MoveToViewController(ViewControllers.IndexOf(viewController), animated);
}
