[iOS] Fix for Editor scaling creating new lines on older iOS versions

src/Controls/tests/TestCases.HostApp/Issues/Issue25581.xaml

@@ -0,0 +1,20 @@
+<?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.Issue25581"
+             xmlns:ns="clr-namespace:Maui.Controls.Sample.Issues">
+
+  <VerticalStackLayout>
+    <Button Text="Change Scale"
+            AutomationId="Button"
+            Clicked="Button_Clicked"/>
+    <Editor
+      x:Name="editor"
+      Text="1234567890"
+      Background="Red"
+      FontSize="32"
+      HorizontalOptions="Center"
+      HorizontalTextAlignment="Center"/>
+
+  </VerticalStackLayout>
+</ContentPage>

src/Controls/tests/TestCases.HostApp/Issues/Issue25581.xaml.cs

@@ -0,0 +1,15 @@
+namespace Maui.Controls.Sample.Issues;
+
+[Issue(IssueTracker.Github, 25581, "Editor Scaling creating new lines on older iOS versions", PlatformAffected.iOS)]
+public partial class Issue25581 : ContentPage
+{
+	public Issue25581()
+	{
+		InitializeComponent();
+	}
+
+	private void Button_Clicked(object sender, EventArgs e)
+	{
+		editor.Scale = 0.5;
+	}
+}

src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue25581.cs

@@ -0,0 +1,27 @@
+#if !MACCATALYST
+using NUnit.Framework;
+using UITest.Appium;
+using UITest.Core;
+
+namespace Microsoft.Maui.TestCases.Tests.Issues
+{
+	public class Issue25581 : _IssuesUITest
+	{
+		public override string Issue => "Editor Scaling creating new lines on older iOS versions";
+
+		public Issue25581(TestDevice device)
+		: base(device)
+		{ }
+
+		[Test]
+		[Category(UITestCategories.Editor)]
+		public void VerifyDynamicEditorScaling()
+		{
+			App.WaitForElement("Button");
+			App.Tap("Button");
+
+			VerifyScreenshot();
+		}
+	}
+}
+#endif

src/Core/src/Handlers/Editor/EditorHandler.iOS.cs

@@ -53,6 +53,23 @@ protected override void DisconnectHandler(MauiTextView platformView)
 			_proxy.Disconnect(platformView);
 		}
 
+		public override bool NeedsContainer
+		{
+			get
+			{
+				// The layout of the Editor behaves differently on iOS 16 and earlier versions when the size or scale changes at runtime.
+				// https://github.com/dotnet/maui/issues/25581 - The content height gradually increases when scaling down the Editor, indicating improper handling of sizing.
+				// It appears that iOS 17.0 manages this correctly.
+				// To ensure consistent behavior that matches iOS 17.0, we wrap the Editor in a container on iOS 16 and earlier versions.
+				if (!OperatingSystem.IsIOSVersionAtLeast(17) && !OperatingSystem.IsMacCatalyst())
+				{
+					return true;
+				}
+
+				return base.NeedsContainer;
+			}
+		}
+
 		public override Size GetDesiredSize(double widthConstraint, double heightConstraint)
 		{
 			if (double.IsInfinity(widthConstraint) || double.IsInfinity(heightConstraint))

src/Core/src/PublicAPI/net-ios/PublicAPI.Unshipped.txt

@@ -77,3 +77,4 @@ static Microsoft.Maui.ViewExtensions.DisconnectHandlers(this Microsoft.Maui.IVie
 override Microsoft.Maui.Platform.MauiCALayer.AddAnimation(CoreAnimation.CAAnimation! animation, string? key) -> void
 *REMOVED*override Microsoft.Maui.Handlers.BorderHandler.ConnectHandler(Microsoft.Maui.Platform.ContentView! platformView) -> void
 override Microsoft.Maui.Handlers.BorderHandler.PlatformArrange(Microsoft.Maui.Graphics.Rect rect) -> void
+override Microsoft.Maui.Handlers.EditorHandler.NeedsContainer.get -> bool

src/Core/src/PublicAPI/net-maccatalyst/PublicAPI.Unshipped.txt

@@ -77,3 +77,4 @@ static Microsoft.Maui.ViewExtensions.DisconnectHandlers(this Microsoft.Maui.IVie
 override Microsoft.Maui.Platform.MauiCALayer.AddAnimation(CoreAnimation.CAAnimation! animation, string? key) -> void
 *REMOVED*override Microsoft.Maui.Handlers.BorderHandler.ConnectHandler(Microsoft.Maui.Platform.ContentView! platformView) -> void
 override Microsoft.Maui.Handlers.BorderHandler.PlatformArrange(Microsoft.Maui.Graphics.Rect rect) -> void
+override Microsoft.Maui.Handlers.EditorHandler.NeedsContainer.get -> bool