[iOS] ViewCells will respond to ForceUpdateSize in RecycleElement mode (#809)

* Add reproduction for 44525

* Clean up gallery page

* [iOS] Get index path from Cell in RecycleElement

* Fix obsolete code

2 files changed, 105 insertions, 0 deletions

diff --git a/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Bugzilla44525.cs b/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Bugzilla44525.cs
new file mode 100644
index 00000000..e159aa71
--- /dev/null
+++ b/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Bugzilla44525.cs
@@ -0,0 +1,104 @@
+using System;
+using System.Linq;
+using System.Collections.Generic;
+using Xamarin.Forms.CustomAttributes;
+using Xamarin.Forms.Internals;
+using System.ComponentModel;
+
+namespace Xamarin.Forms.Controls
+{
+	[Preserve(AllMembers = true)]
+	[Issue(IssueTracker.Bugzilla, 44525, "Listview Row Height Does Not Adapt In iOS")]
+	public class Bugzilla44525 : TestContentPage
+	{
+		List<Person> _DataSource;
+
+		[Preserve(AllMembers = true)]
+		class CustomCell : ViewCell
+		{
+			public CustomCell()
+			{
+				Label age = new Label();
+				Label name = new Label();
+				StackLayout cellWrapper = new StackLayout();
+
+				age.SetBinding(Label.TextProperty, "Age");
+				name.SetBinding(Label.TextProperty, "Name");
+
+				age.PropertyChanged += UpdateCell;
+				name.PropertyChanged += UpdateCell;
+
+				cellWrapper.Children.Add(age);
+				cellWrapper.Children.Add(name);
+
+				View = cellWrapper;
+			}
+
+			void UpdateCell(object sender, PropertyChangedEventArgs e)
+			{
+				if (e.PropertyName == Label.TextProperty.PropertyName)
+				{
+					ForceUpdateSize();
+				}
+			}
+		}
+
+		class Person : ViewModelBase
+		{
+			private string _Name;
+			public string Name
+			{
+				get
+				{
+					return _Name;
+				}
+				set
+				{
+					if (_Name == value)
+						return;
+
+					_Name = value;
+					OnPropertyChanged();
+				}
+			}
+
+			private string _Age;
+			public string Age
+			{
+				get
+				{
+					return _Age;
+				}
+				set
+				{
+					if (_Age == value)
+						return;
+
+					_Age = value;
+					OnPropertyChanged();
+				}
+			}
+		}
+
+		protected override void Init()
+		{
+			_DataSource = Enumerable.Range(1, 100).Select(c => new Person { Name = $"Person {c}", Age = $"{c} year(s) old" }).ToList();
+
+			var listView = new ListView(ListViewCachingStrategy.RecycleElement)
+			{
+				ItemTemplate = new DataTemplate(typeof(CustomCell)),
+				ItemsSource = _DataSource,
+				HasUnevenRows = true
+			};
+
+			var button = new Button { Text = "Click me" };
+			button.Clicked += (sender, e) =>
+			{
+				var target = _DataSource[1];
+				target.Name = "I am an exceptionally long string that should cause the label to wrap, thus increasing the size of the ViewCell such that the entirety of the string is readable by human eyes. Hurrah.";
+			};
+
+			Content = new StackLayout { Children = { button, listView } };
+		}
+	}
+}
diff --git a/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Xamarin.Forms.Controls.Issues.Shared.projitems b/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Xamarin.Forms.Controls.Issues.Shared.projitems
index 99f2bf81..38fc48a0 100644
--- a/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Xamarin.Forms.Controls.Issues.Shared.projitems
+++ b/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Xamarin.Forms.Controls.Issues.Shared.projitems
@@ -247,6 +247,7 @@
     <Compile Include="$(MSBuildThisFileDirectory)Bugzilla40722.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Bugzilla41153.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Bugzilla44129.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Bugzilla44525.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Bugzilla28650.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Bugzilla37431.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Bugzilla44777.cs" />