[iOS] Fix MediaPicker modal dismissal issue in CapturePhotoAsync/CaptureVideoAsync

src/Controls/tests/TestCases.HostApp/Issues/Issue31075.xaml

@@ -0,0 +1,26 @@
+<?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.Issue31075"
+             Title="MediaPicker Modal Test">
+    <StackLayout Padding="20" Spacing="20">
+        <Label Text="Test for MediaPicker modal dismissal issue" 
+               HorizontalOptions="Center" 
+               FontSize="16" />
+
+        <Label Text="1. Tap 'Open Modal' to open a modal page" />
+        <Label Text="2. Tap 'Test MediaPicker' in the modal" />
+        <Label Text="3. Cancel the camera UI" />
+        <Label Text="4. Verify the modal page is NOT dismissed" />
+
+        <Button x:Name="OpenModalButton"
+                Text="Open Modal"
+                AutomationId="OpenModalButton"
+                Clicked="OnOpenModalClicked" />
+
+        <Label x:Name="StatusLabel"
+               Text="Ready to test"
+               AutomationId="StatusLabel"
+               HorizontalOptions="Center" />
+    </StackLayout>
+</ContentPage>

src/Controls/tests/TestCases.HostApp/Issues/Issue31075.xaml.cs

@@ -0,0 +1,31 @@
+namespace Maui.Controls.Sample.Issues
+{
+	[Issue(IssueTracker.Github, 31075, "MediaPicker.CapturePhotoAsync / CaptureVideoAsync causes modal page to dismiss unexpectedly", PlatformAffected.iOS)]
+	public partial class Issue31075 : ContentPage
+	{
+		public Issue31075()
+		{
+			InitializeComponent();
+		}
+
+		async void OnOpenModalClicked(object sender, System.EventArgs e)
+		{
+			try
+			{
+				var modalPage = new Issue31075Modal();
+				modalPage.ModalClosed += OnModalClosed;
+				await Navigation.PushModalAsync(modalPage);
+				StatusLabel.Text = "Modal opened";
+			}
+			catch (Exception ex)
+			{
+				StatusLabel.Text = $"Error: {ex.Message}";
+			}
+		}
+
+		void OnModalClosed(object sender, EventArgs e)
+		{
+			StatusLabel.Text = "Modal closed successfully";
+		}
+	}
+}

src/Controls/tests/TestCases.HostApp/Issues/Issue31075Modal.xaml

@@ -0,0 +1,34 @@
+<?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.Issue31075Modal"
+             Title="Modal Page">
+    <StackLayout Padding="20" Spacing="20">
+        <Label Text="This is a modal page" 
+               HorizontalOptions="Center" 
+               FontSize="18" 
+               FontAttributes="Bold" />
+
+        <Label Text="Test MediaPicker without dismissing this modal:" />
+
+        <Button x:Name="TestMediaPickerButton"
+                Text="Test MediaPicker (Photo)"
+                AutomationId="TestMediaPickerButton"
+                Clicked="OnTestMediaPickerClicked" />
+
+        <Button x:Name="TestVideoPickerButton"
+                Text="Test MediaPicker (Video)"
+                AutomationId="TestVideoPickerButton"
+                Clicked="OnTestVideoPickerClicked" />
+
+        <Label x:Name="ResultLabel"
+               Text="No test performed yet"
+               AutomationId="ResultLabel"
+               HorizontalOptions="Center" />
+
+        <Button x:Name="CloseModalButton"
+                Text="Close Modal"
+                AutomationId="CloseModalButton"
+                Clicked="OnCloseModalClicked" />
+    </StackLayout>
+</ContentPage>

src/Controls/tests/TestCases.HostApp/Issues/Issue31075Modal.xaml.cs

@@ -0,0 +1,68 @@
+using Microsoft.Maui.Media;
+
+namespace Maui.Controls.Sample.Issues
+{
+	public partial class Issue31075Modal : ContentPage
+	{
+		public event EventHandler ModalClosed;
+
+		public Issue31075Modal()
+		{
+			InitializeComponent();
+		}
+
+		async void OnTestMediaPickerClicked(object sender, System.EventArgs e)
+		{
+			try
+			{
+				ResultLabel.Text = "Testing photo capture...";
+
+				// Test the MediaPicker that was previously causing modal dismissal
+				var result = await MediaPicker.CapturePhotoAsync();
+
+				if (result != null)
+				{
+					ResultLabel.Text = "Photo captured successfully!";
+				}
+				else
+				{
+					ResultLabel.Text = "Photo capture was cancelled";
+				}
+			}
+			catch (Exception ex)
+			{
+				ResultLabel.Text = $"Error: {ex.Message}";
+			}
+		}
+
+		async void OnTestVideoPickerClicked(object sender, System.EventArgs e)
+		{
+			try
+			{
+				ResultLabel.Text = "Testing video capture...";
+
+				// Test the MediaPicker that was previously causing modal dismissal
+				var result = await MediaPicker.CaptureVideoAsync();
+
+				if (result != null)
+				{
+					ResultLabel.Text = "Video captured successfully!";
+				}
+				else
+				{
+					ResultLabel.Text = "Video capture was cancelled";
+				}
+			}
+			catch (Exception ex)
+			{
+				ResultLabel.Text = $"Error: {ex.Message}";
+			}
+		}
+
+		async void OnCloseModalClicked(object sender, System.EventArgs e)
+		{
+			ModalClosed?.Invoke(this, EventArgs.Empty);
+			await Navigation.PopModalAsync();
+		}
+	}
+}

src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue31075.cs

@@ -0,0 +1,96 @@
+using NUnit.Framework;
+using UITest.Appium;
+using UITest.Core;
+
+namespace Microsoft.Maui.TestCases.Tests.Issues
+{
+	public class Issue31075 : _IssuesUITest
+	{
+		public Issue31075(TestDevice device) : base(device)
+		{
+		}
+
+		public override string Issue => "MediaPicker.CapturePhotoAsync / CaptureVideoAsync causes modal page to dismiss unexpectedly";
+
+		[Test]
+		[Category(UITestCategories.Navigation)]
+		[Category(UITestCategories.Page)]
+		public void MediaPickerShouldNotDismissModal()
+		{
+			// Open the modal page
+			App.WaitForElement("OpenModalButton");
+			App.Tap("OpenModalButton");
+
+			// Verify modal opened
+			App.WaitForElement("TestMediaPickerButton");
+			App.WaitForElement("CloseModalButton");
+
+			// Test MediaPicker (this would previously dismiss the modal on iOS)
+			App.Tap("TestMediaPickerButton");
+
+			// On iOS, a permission dialog might appear - we'll handle this gracefully
+			try
+			{
+				// Wait a moment for any permission dialogs
+				System.Threading.Thread.Sleep(2000);
+
+				// Try to dismiss any system dialogs (camera permission, camera UI, etc.)
+				// The exact behavior will depend on the iOS simulator/device state
+				// Since we can't easily test the actual camera in UI tests, 
+				// the important thing is that the modal page is still present
+			}
+			catch
+			{
+				// Ignore any exceptions from system UI interactions
+			}
+
+			// The critical test: verify the modal page is still present
+			// If the bug exists, this element would not be found because the modal would be dismissed
+			App.WaitForElement("CloseModalButton", "Modal should still be present after MediaPicker interaction");
+			App.WaitForElement("TestMediaPickerButton", "Modal content should still be present");
+
+			// Clean up by closing the modal properly
+			App.Tap("CloseModalButton");
+
+			// Verify we're back to the main page
+			App.WaitForElement("OpenModalButton");
+		}
+
+		[Test]
+		[Category(UITestCategories.Navigation)]
+		[Category(UITestCategories.Page)]
+		public void VideoPickerShouldNotDismissModal()
+		{
+			// Open the modal page
+			App.WaitForElement("OpenModalButton");
+			App.Tap("OpenModalButton");
+
+			// Verify modal opened
+			App.WaitForElement("TestVideoPickerButton");
+			App.WaitForElement("CloseModalButton");
+
+			// Test Video MediaPicker (this would previously dismiss the modal on iOS)
+			App.Tap("TestVideoPickerButton");
+
+			// Similar to photo test - handle system UI gracefully
+			try
+			{
+				System.Threading.Thread.Sleep(2000);
+			}
+			catch
+			{
+				// Ignore any exceptions from system UI interactions
+			}
+
+			// The critical test: verify the modal page is still present
+			App.WaitForElement("CloseModalButton", "Modal should still be present after MediaPicker interaction");
+			App.WaitForElement("TestVideoPickerButton", "Modal content should still be present");
+
+			// Clean up by closing the modal properly
+			App.Tap("CloseModalButton");
+
+			// Verify we're back to the main page
+			App.WaitForElement("OpenModalButton");
+		}
+	}
+}

src/Essentials/src/MediaPicker/MediaPicker.ios.cs

@@ -86,7 +86,7 @@ public async Task<FileResult> PhotoAsync(MediaPickerOptions options, bool photo,
 			{
 				CompletedHandler = async info =>
 				{
-					await vc.DismissViewControllerAsync(true);
+					await picker.DismissViewControllerAsync(true);
 					GetFileResult(info, tcs);
 				}
 			};