[iOS 26] Fix Entry MaxLength not enforced due to new multi-range delegate

src/Controls/tests/TestCases.HostApp/Issues/Issue32016.cs

@@ -0,0 +1,15 @@
+namespace Maui.Controls.Sample.Issues
+{
+	[Issue(IssueTracker.Github, 32016, "iOS 26 MaxLength not enforced on Entry", PlatformAffected.iOS)]
+	public class Issue32016 : ContentPage
+	{
+		public Issue32016()
+		{
+			Content = new Entry()
+			{
+				AutomationId = "TestEntry",
+				MaxLength = 10,
+			};
+		}
+	}
+}

src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue32016.cs

@@ -0,0 +1,26 @@
+using NUnit.Framework;
+using UITest.Appium;
+using UITest.Core;
+
+namespace Microsoft.Maui.TestCases.Tests.Issues;
+
+public class Issue32016 : _IssuesUITest
+{
+	public override string Issue => "iOS 26 MaxLength not enforced on Entry";
+
+	public Issue32016(TestDevice device) : base(device) { }
+
+	[Test]
+	[Category(UITestCategories.Entry)]
+	public void EntryMaxLengthEnforcedOnIOS26()
+	{
+		App.WaitForElement("TestEntry");
+
+		// Type characters up to MaxLength
+		App.Tap("TestEntry");
+		App.EnterText("TestEntry", "1234567890x");
+
+		var text = App.FindElement("TestEntry").GetText();
+		Assert.That(text, Is.EqualTo("1234567890"), "Text should be '1234567890' - the 'x' should be blocked by MaxLength");
+	}
+}

src/Core/src/Handlers/Entry/EntryHandler.iOS.cs

@@ -136,7 +136,14 @@ public void Connect(IEntry virtualView, MauiTextField platformView)
 				platformView.EditingChanged += OnEditingChanged;
 				platformView.EditingDidEnd += OnEditingEnded;
 				platformView.TextPropertySet += OnTextPropertySet;
-				platformView.ShouldChangeCharacters += OnShouldChangeCharacters;
+				if (OperatingSystem.IsIOSVersionAtLeast(26) || OperatingSystem.IsMacCatalystVersionAtLeast(26))
+				{
+					platformView.ShouldChangeCharactersInRanges += ShouldChangeCharactersInRanges;
+				}
+				else
+				{
+					platformView.ShouldChangeCharacters += OnShouldChangeCharacters;
+				}
 			}
 
 			public void Disconnect(MauiTextField platformView)
@@ -148,7 +155,14 @@ public void Disconnect(MauiTextField platformView)
 				platformView.EditingChanged -= OnEditingChanged;
 				platformView.EditingDidEnd -= OnEditingEnded;
 				platformView.TextPropertySet -= OnTextPropertySet;
-				platformView.ShouldChangeCharacters -= OnShouldChangeCharacters;
+				if (OperatingSystem.IsIOSVersionAtLeast(26) || OperatingSystem.IsMacCatalystVersionAtLeast(26))
+				{
+					platformView.ShouldChangeCharactersInRanges -= ShouldChangeCharactersInRanges;
+				}
+				else
+				{
+					platformView.ShouldChangeCharacters -= OnShouldChangeCharacters;
+				}
 
 				if (_set)
 					platformView.SelectionChanged -= OnSelectionChanged;
@@ -213,6 +227,56 @@ void OnTextPropertySet(object? sender, EventArgs e)
 				}
 			}
 
+			bool ShouldChangeCharactersInRanges(UITextField textField, NSValue[] ranges, string replacementString)
+			{
+				if (ranges == null || ranges.Length == 0)
+					return true;
+
+				var maxLength = VirtualView?.MaxLength ?? -1;
+				if (maxLength < 0)
+					return true;
+
+				// Handle null replacement string defensively
+				replacementString ??= string.Empty;
+
+				var currentText = textField.Text ?? string.Empty;
+
+				// Copy and sort ranges (existing code is correct)
+				var count = ranges.Length;
+				var rangeArray = new NSRange[count];
+				for (int i = 0; i < count; i++)
+					rangeArray[i] = ranges[i].RangeValue;
+
+				Array.Sort(rangeArray, (a, b) => (int)(b.Location - a.Location));
+
+				// Simulate all range replacements (existing code is correct)
+				for (int i = 0; i < count; i++)
+				{
+					var range = rangeArray[i];
+					var start = (int)range.Location;
+					var length = (int)range.Length;
+
+					if (start < 0 || length < 0 || start > currentText.Length || start + length > currentText.Length)
+						return false;
+
+					var before = start > 0 ? currentText.Substring(0, start) : string.Empty;
+					var afterIndex = start + length;
+					var after = afterIndex < currentText.Length ? currentText.Substring(afterIndex) : string.Empty;
+					currentText = before + replacementString + after;
+				}
+
+				var shouldChange = currentText.Length <= maxLength;
+
+				// Paste truncation feature (matches pre-iOS 26 behavior)
+				if (VirtualView is not null && !shouldChange && !string.IsNullOrWhiteSpace(replacementString) &&
+					replacementString.Length >= maxLength)
+				{
+					VirtualView.Text = replacementString.AsSpan(0, maxLength).ToString();
+				}
+
+				return shouldChange;
+			}
+
 			bool OnShouldChangeCharacters(UITextField textField, NSRange range, string replacementString) =>
 				VirtualView?.TextWithinMaxLength(textField.Text, range, replacementString) ?? false;
 
@@ -232,4 +296,4 @@ void OnSelectionChanged(object? sender, EventArgs e)
 			}
 		}
 	}
-}
+}