Fixed the Label height within VerticalStackLayout is truncated when width is set

src/Controls/tests/TestCases.HostApp/Issues/Issue15559.xaml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             x:Class="Maui.Controls.Sample.Issues.Issue15559"
+             Title="Issue15559">
+
+  <VerticalStackLayout Spacing="20" Margin="20">
+
+    <VerticalStackLayout WidthRequest="200" BackgroundColor="Yellow">
+        <Label Text="Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore."/>
+    </VerticalStackLayout>
+
+    <VerticalStackLayout  BackgroundColor="Yellow">
+        <Label AutomationId="Label" WidthRequest="200" Text="Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore."/>
+    </VerticalStackLayout>
+</VerticalStackLayout>
+</ContentPage>

src/Controls/tests/TestCases.HostApp/Issues/Issue15559.xaml.cs

@@ -0,0 +1,11 @@
+namespace Maui.Controls.Sample.Issues;
+
+[Issue(IssueTracker.Github, 15559, "[iOS] Vertical layout content of label is truncated when a width request is set in the layout", PlatformAffected.iOS | PlatformAffected.macOS)]
+
+public partial class Issue15559 : ContentPage
+{
+	public Issue15559()
+	{
+		InitializeComponent();
+	}
+}

src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue15559.cs

@@ -0,0 +1,22 @@
+using NUnit.Framework;
+using UITest.Appium;
+using UITest.Core;
+
+namespace Microsoft.Maui.TestCases.Tests.Issues
+{
+	public class Issue15559 : _IssuesUITest
+	{
+		public override string Issue => "[iOS] Vertical layout content of label is truncated when a width request is set in the layout";
+
+		public Issue15559(TestDevice device) : base(device)
+		{ }
+
+		[Test]
+		[Category(UITestCategories.Layout)]
+		public void LabelDisplayWithoutCroppingInsideVerticalLayout()
+		{
+			App.WaitForElement("Label");
+			VerifyScreenshot();
+		}
+	}
+}

src/Core/src/Handlers/ViewHandlerExtensions.iOS.cs

@@ -89,6 +89,13 @@ internal static Size GetDesiredSizeFromHandler(this IViewHandler viewHandler, do
 
 				sizeThatFits = imageView.SizeThatFitsImage(new CGSize((float)widthConstraint, (float)heightConstraint));
 			}
+			else if (platformView is LayoutView || platformView is MauiLabel)
+			{
+				widthConstraint = IsExplicitSet(virtualView.Width) ? virtualView.Width : widthConstraint;
+			   	heightConstraint = IsExplicitSet(virtualView.Height) ? virtualView.Height : heightConstraint;
+
+				sizeThatFits = platformView.SizeThatFits(new CGSize((float)widthConstraint, (float)heightConstraint));
+			}
 			else if (platformView is WrapperView wrapper)
 			{
 				sizeThatFits = wrapper.SizeThatFitsWrapper(new CGSize((float)widthConstraint, (float)heightConstraint), virtualView.Width, virtualView.Height, virtualView);