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);
}
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);
}