diff options
Diffstat (limited to 'Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Issue1703.cs')
-rw-r--r-- | Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Issue1703.cs | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Issue1703.cs b/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Issue1703.cs new file mode 100644 index 00000000..3f301d33 --- /dev/null +++ b/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Issue1703.cs @@ -0,0 +1,63 @@ +using System; +using System.Collections.Generic; +using System.Linq; + +using Xamarin.Forms.CustomAttributes; + +namespace Xamarin.Forms.Controls +{ + [Preserve (AllMembers=true)] + [Issue (IssueTracker.Github, 1703, "Memory leak when navigating a page off of a navigation stack", PlatformAffected.Android | PlatformAffected.iOS | PlatformAffected.WinPhone)] + public class Issue1703 : NavigationPage + { + static List<WeakReference> s_pageRefs = new List<WeakReference>(); + + public Issue1703 () + { + Navigation.PushAsync (GetMainPage ()); + } + + public static Page GetMainPage() + { + return CreateWeakReferencedPage(); + } + + static Page CreateWeakReferencedPage() + { + GC.Collect(); + var result = CreatePage(); + s_pageRefs.Add(new WeakReference(result)); + + // Add a second unreferenced page to prove that the problem only exists + // when pages are actually navigated to/from + s_pageRefs.Add(new WeakReference(CreatePage())); + GC.Collect(); + return result; + } + + static Page CreatePage() + { + var page = new ContentPage(); + var contents = new StackLayout(); + + contents.Children.Add( + new Button + { + Text = "Next Page", + Command = new Command(() => page.Navigation.PushAsync(CreateWeakReferencedPage())) + }); + contents.Children.Add( + new Label + { + Text = string.Format( + "References alive at time of creation: {0}", + s_pageRefs.Count(p => p.IsAlive)), + HorizontalOptions = LayoutOptions.CenterAndExpand + }); + + page.Content = contents; + return page; + } + } +} + |