135 строки
3.1 KiB
C#
135 строки
3.1 KiB
C#
using System;
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using System.Collections.Generic;
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using Xamarin.Forms.CustomAttributes;
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using Xamarin.Forms.Internals;
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using System.Threading;
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#if UITEST
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using Xamarin.UITest;
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using NUnit.Framework;
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#endif
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namespace Xamarin.Forms.Controls.Issues
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{
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[Preserve(AllMembers = true)]
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[Issue(IssueTracker.Bugzilla, 43941, "Memory leak with ListView's RecycleElement on iOS", PlatformAffected.iOS)]
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public class Bugzilla43941 : TestNavigationPage
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{
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protected override void Init()
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{
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PushAsync(new LandingPage43941());
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}
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#if UITEST
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[Test]
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public void Bugzilla43941Test()
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{
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for (var n = 0; n < 10; n++)
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{
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RunningApp.WaitForElement(q => q.Marked("Push"));
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RunningApp.Tap(q => q.Marked("Push"));
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RunningApp.WaitForElement(q => q.Marked("ListView"));
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RunningApp.Back();
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}
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// At this point, the counter can be any value, but it's most likely not zero.
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// Invoking GC once is enough to clean up all garbage data and set counter to zero
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RunningApp.WaitForElement(q => q.Marked("GC"));
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RunningApp.Tap(q => q.Marked("GC"));
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RunningApp.WaitForElement(q => q.Marked("Counter: 0"));
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}
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#endif
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}
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[Preserve(AllMembers = true)]
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public class ContentPage43941 : ContentPage
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{
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public ContentPage43941()
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{
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Interlocked.Increment(ref LandingPage43941.Counter);
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System.Diagnostics.Debug.WriteLine("Page: " + LandingPage43941.Counter);
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var list = new List<int>();
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for (var i = 0; i < 30; i++)
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list.Add(i);
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Title = "ContentPage43941";
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Content = new ListView
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{
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HasUnevenRows = true,
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ItemsSource = list,
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AutomationId = "ListView"
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};
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}
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~ContentPage43941()
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{
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Interlocked.Decrement(ref LandingPage43941.Counter);
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System.Diagnostics.Debug.WriteLine("Page: " + LandingPage43941.Counter);
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}
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}
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[Preserve(AllMembers = true)]
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public class LandingPage43941 : ContentPage
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{
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public static int Counter;
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public Label Label;
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public LandingPage43941()
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{
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Label = new Label
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{
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Text = "Counter: " + Counter,
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HorizontalTextAlignment = TextAlignment.Center,
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VerticalTextAlignment = TextAlignment.Center
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};
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Content = new StackLayout
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{
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Orientation = StackOrientation.Vertical,
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HorizontalOptions = LayoutOptions.Center,
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VerticalOptions = LayoutOptions.Center,
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Spacing = 15,
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Children =
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{
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new Label
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{
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Text = "Click Push to show a ListView. When you hit the Back button, Counter will show the number of pages that have not been finalized yet."
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+ " If you click GC, the counter should be 0."
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},
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Label,
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new Button
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{
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Text = "GC",
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AutomationId = "GC",
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Command = new Command(o =>
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{
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GC.Collect();
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GC.WaitForPendingFinalizers();
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Label.Text = "Counter: " + Counter;
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})
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},
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new Button
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{
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Text = "Push",
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AutomationId = "Push",
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Command = new Command(async o =>
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{
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await Navigation.PushAsync(new ContentPage43941());
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})
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}
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}
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};
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}
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protected override void OnAppearing()
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{
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base.OnAppearing();
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if (Label != null)
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Label.Text = "Counter: " + Counter;
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}
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}
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} |