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[iOS] Unsubscribe CellPropertyChanged when SwitchCellRenderer is disposed #3518
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,221 @@ | ||
| using Xamarin.Forms.CustomAttributes; | ||
| using Xamarin.Forms.Internals; | ||
| using System; | ||
| using System.Collections.Generic; | ||
| using System.Linq; | ||
| using static Xamarin.Forms.Controls.Issues.Issue3408; | ||
|
|
||
| #if UITEST | ||
| using Xamarin.UITest; | ||
| using NUnit.Framework; | ||
| #endif | ||
|
|
||
| namespace Xamarin.Forms.Controls.Issues | ||
| { | ||
| // This may crash for you on Android if you click too many buttons | ||
| // https://github.com/xamarin/Xamarin.Forms/issues/3603 | ||
| [Preserve(AllMembers = true)] | ||
| [Issue(IssueTracker.Github, 3408, "System.ObjectDisposedException: from SwitchCellRenderer when changing ItemSource", PlatformAffected.iOS)] | ||
| public class Issue3408 : TestContentPage | ||
| { | ||
| public static List<Recommendation> GetRecommendations(object e) | ||
| { | ||
| switch (e) | ||
| { | ||
| case List<RecommendationsViewModel> pc: return pc.First().Recommendations; | ||
| case List<RecommendationsViewModel2> pc: return pc.First().Recommendations; | ||
| default: return null; | ||
| } | ||
| } | ||
| protected override void Init() | ||
| { | ||
|
|
||
| var grd = new Grid(); | ||
|
|
||
| var aacountListView = new ListView(); | ||
| aacountListView.HasUnevenRows = true; | ||
| aacountListView.ItemTemplate = new AccountDetailsDataTemplateSelector(); | ||
| aacountListView.BindingContext = new List<RecommendationsViewModel> { new RecommendationsViewModel() }; | ||
|
|
||
| aacountListView.SetBinding(ListView.ItemsSourceProperty, "."); | ||
| var btn = new Button | ||
| { | ||
| Text = "Change Source", | ||
| AutomationId = "btn1", | ||
| Command = new Command(() => | ||
| { | ||
| aacountListView.BindingContext = new List<RecommendationsViewModel2> { new RecommendationsViewModel2() }; | ||
| }) | ||
| }; | ||
| var btn2 = new Button | ||
| { | ||
| Text = "Change Property", | ||
| AutomationId = "btn2", | ||
| Command = new Command(() => | ||
| { | ||
|
|
||
| foreach (var item in GetRecommendations(aacountListView.BindingContext)) | ||
| { | ||
| item.Name = "New Item Name"; | ||
| item.IsBusy = !item.IsBusy; | ||
| } | ||
|
|
||
| }) | ||
| }; | ||
| grd.Children.Add(aacountListView); | ||
| Grid.SetRow(aacountListView, 0); | ||
| grd.Children.Add(btn); | ||
| Grid.SetRow(btn, 1); | ||
| grd.Children.Add(btn2); | ||
| Grid.SetRow(btn2, 2); | ||
| Content = grd; | ||
| } | ||
|
|
||
| #if UITEST | ||
| [Test] | ||
| public void Issue3408Test () | ||
| { | ||
| RunningApp.WaitForElement (q => q.Marked ("btn1")); | ||
| RunningApp.WaitForElement (q => q.Marked ("Click to Change")); | ||
| RunningApp.Tap(q => q.Marked("btn1")); | ||
| RunningApp.WaitForElement(q => q.Marked("This should have changed")); | ||
| RunningApp.Tap(q => q.Marked("btn2")); | ||
| RunningApp.WaitForElement(q => q.Marked("New Item Name")); | ||
| } | ||
| #endif | ||
|
|
||
| [Preserve(AllMembers = true)] | ||
| public class RecommendationsBaseViewModel : ViewModelBase | ||
| { | ||
| public string AccountName => $""; | ||
| public List<Recommendation> Recommendations { get; set; } | ||
| } | ||
|
|
||
| [Preserve(AllMembers = true)] | ||
| public class RecommendationsViewModel : RecommendationsBaseViewModel | ||
| { | ||
| public string AccountName => $"Recommendations"; | ||
|
|
||
| public RecommendationsViewModel() | ||
| { | ||
| Recommendations = new List<Recommendation>() | ||
| { | ||
| new Recommendation(){ Name = "Click to Change"} , | ||
| new Recommendation(){ Name = "Recommendations"} , | ||
| new Recommendation(){ Name = "Recommendations"} , | ||
| }; | ||
| } | ||
| } | ||
|
|
||
| [Preserve(AllMembers = true)] | ||
| public class RecommendationsViewModel2 : RecommendationsBaseViewModel | ||
| { | ||
| public string AccountName => $"Recommendations 2"; | ||
| public RecommendationsViewModel2() | ||
| { | ||
| Recommendations = new List<Recommendation>() | ||
| { | ||
| new Recommendation(){ Name = "This should have changed"} , | ||
| new Recommendation(){ Name = "Recommendations 2"} , | ||
| new Recommendation(){ Name = "Recommendations 2", IsBusy = true } , | ||
| }; | ||
| } | ||
| } | ||
|
|
||
| [Preserve(AllMembers = true)] | ||
| public class Recommendation : ViewModelBase | ||
| { | ||
| string _name; | ||
| public string Name | ||
| { | ||
| get { return _name; } | ||
| set | ||
| { | ||
| if (_name == value) | ||
| return; | ||
| _name = value; | ||
| OnPropertyChanged(); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| } | ||
|
|
||
| [Preserve(AllMembers = true)] | ||
| public class RecommendationsView : ContentView | ||
| { | ||
| public RecommendationsView() | ||
| { | ||
| Grid grd = new Grid(); | ||
| var lst = new ListView | ||
| { | ||
| ItemTemplate = new DataTemplate(() => | ||
| { | ||
| var swittch = new SwitchCell(); | ||
| swittch.SetBinding(SwitchCell.TextProperty, new Binding("Name")); | ||
| swittch.SetBinding(SwitchCell.OnProperty, new Binding("IsBusy")); | ||
| return swittch; | ||
| }) | ||
|
|
||
| }; | ||
|
|
||
| lst.SetBinding(ListView.ItemsSourceProperty, new Binding("Recommendations")); | ||
| grd.Children.Add(lst); | ||
| Content = grd; | ||
| } | ||
|
|
||
| // This work around exists because of this issue | ||
| // https://github.com/xamarin/Xamarin.Forms/issues/3602 | ||
| object context = null; | ||
| protected override void OnBindingContextChanged() | ||
| { | ||
| base.OnBindingContextChanged(); | ||
| if (BindingContext == null) | ||
| Device.BeginInvokeOnMainThread(() => BindingContext = context); | ||
| else | ||
| context = BindingContext; | ||
| } | ||
| } | ||
|
|
||
| [Preserve(AllMembers = true)] | ||
| public class AccountDetailsDataTemplateSelector : DataTemplateSelector | ||
| { | ||
| public Lazy<DataTemplate> RecommendationsViewDataTemplate { get; } | ||
| public Lazy<ViewCell> RecommendationsView { get; } | ||
|
|
||
| public Lazy<DataTemplate> RecommendationsViewDataTemplate2 { get; } | ||
| public Lazy<ViewCell> RecommendationsView2 { get; } | ||
|
|
||
| public AccountDetailsDataTemplateSelector() | ||
| { | ||
| RecommendationsView = new Lazy<ViewCell>(() => new ViewCell() { View = new RecommendationsView() }); | ||
| RecommendationsViewDataTemplate = new Lazy<DataTemplate>(() => new DataTemplate(() => RecommendationsView.Value)); | ||
|
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|
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| RecommendationsView2 = new Lazy<ViewCell>(() => new ViewCell() { View = new RecommendationsView() }); | ||
| RecommendationsViewDataTemplate2 = new Lazy<DataTemplate>(() => new DataTemplate(() => RecommendationsView2.Value)); | ||
| } | ||
|
|
||
| protected override DataTemplate OnSelectTemplate(object item, BindableObject container) | ||
| { | ||
| if (item == null) | ||
| { | ||
| return null; | ||
| } | ||
|
|
||
| if (item is RecommendationsViewModel) | ||
| { | ||
| RecommendationsView.Value.BindingContext = item; | ||
| return RecommendationsViewDataTemplate.Value; | ||
| } | ||
|
|
||
| if (item is RecommendationsViewModel2) | ||
| { | ||
| RecommendationsView2.Value.BindingContext = item; | ||
| return RecommendationsViewDataTemplate2.Value; | ||
| } | ||
|
|
||
| throw new ArgumentException("Invalid ViewModel Type"); | ||
| } | ||
| } | ||
| } |
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Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
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are both of these needed?