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Refactor iOS large titles sample and remove legacy page
Replaces the old LargeTitlesPageiOS.cs with an enhanced iOSLargeTitlePage.xaml.cs implementation, providing improved UI and more comprehensive large title and navigation bar demonstrations. Removes the legacy page from OthersViewModel and updates the sample to use the new, feature-rich version. Refactor iOS large titles sample and remove legacy page Replaces the old LargeTitlesPageiOS.cs with an enhanced iOSLargeTitlePage.xaml.cs implementation, providing improved UI and more comprehensive large title and navigation bar demonstrations. Removes the legacy page from OthersViewModel and updates the sample to use the new, feature-rich version. Apply suggestions from code review
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Lines changed: 228 additions & 142 deletions

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‎src/Controls/samples/Controls.Sample/Pages/Others/LargeTitlesPageiOS.cs‎

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‎src/Controls/samples/Controls.Sample/Pages/PlatformSpecifics/iOS/iOSLargeTitlePage.cs‎

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using System;
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using System.Linq;
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using Microsoft.Maui;
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using Microsoft.Maui.Controls;
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using Microsoft.Maui.Controls.PlatformConfiguration;
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using Microsoft.Maui.Controls.PlatformConfiguration.iOSSpecific;
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using Microsoft.Maui.Graphics;
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namespace Maui.Controls.Sample.Pages;
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public partial class iOSLargeTitlePage : ContentPage
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{
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public iOSLargeTitlePage()
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{
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Title = "Large Titles";
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// Set the parent NavigationPage's BarTextColor to black when this page appears
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Appearing += (s, e) =>
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{
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if (Parent is Microsoft.Maui.Controls.NavigationPage navPage)
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{
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navPage.BarTextColor = Colors.Black;
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}
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};
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var scrollView = new Microsoft.Maui.Controls.ScrollView
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{
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Content = new StackLayout
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{
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Padding = new Thickness(10),
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Spacing = 15,
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Children =
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{
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// Display Mode Section
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new Label
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{
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Text = "Display Mode",
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FontSize = 20,
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FontAttributes = FontAttributes.Bold,
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Margin = new Thickness(0, 10, 0, 0)
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},
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new Button
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{
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Text = "Never - Hide large title",
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Command = new Command(() => On<iOS>().SetLargeTitleDisplay(LargeTitleDisplayMode.Never))
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},
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new Button
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{
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Text = "Always - Show large title",
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Command = new Command(() => On<iOS>().SetLargeTitleDisplay(LargeTitleDisplayMode.Always))
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},
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new Button
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{
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Text = "Automatic - Inherit from previous page",
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Command = new Command(async () =>
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{
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var page = new ContentPage { Title = "Automatic Mode" };
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page.On<iOS>().SetLargeTitleDisplay(LargeTitleDisplayMode.Automatic);
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await Navigation.PushAsync(page);
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})
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},
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// Navigation Configuration Section
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new BoxView { HeightRequest = 1, Color = Colors.Gray, Margin = new Thickness(0, 10) },
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new Label
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{
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Text = "Navigation Configuration",
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FontSize = 20,
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FontAttributes = FontAttributes.Bold
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},
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new Button
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{
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Text = "Toggle PrefersLargeTitles on NavigationPage",
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Command = new Command(async () =>
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{
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var navPage = (Microsoft.Maui.Controls.NavigationPage)Parent;
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navPage.On<iOS>().SetPrefersLargeTitles(!navPage.On<iOS>().PrefersLargeTitles());
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// Refresh the page to show the change
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Navigation.InsertPageBefore(new iOSLargeTitlePage(), this);
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await Navigation.PopAsync(false);
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})
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},
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// Scrolling Behavior Section
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new BoxView { HeightRequest = 1, Color = Colors.Gray, Margin = new Thickness(0, 10) },
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new Label
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{
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Text = "Scrolling Behavior",
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FontSize = 20,
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FontAttributes = FontAttributes.Bold
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},
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new Button
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{
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Text = "ScrollView - Watch title collapse on scroll",
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Command = new Command(async () =>
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{
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var navPage = (Microsoft.Maui.Controls.NavigationPage)Parent;
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navPage.On<iOS>().SetPrefersLargeTitles(true);
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var page = new ContentPage { Title = "Scroll Me" };
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page.On<iOS>().SetLargeTitleDisplay(LargeTitleDisplayMode.Always);
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var scrollContent = new StackLayout { Padding = 20, Spacing = 10 };
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for (int i = 1; i <= 50; i++)
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{
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scrollContent.Children.Add(new Label
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{
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Text = $"Item {i} - Scroll to see the large title collapse",
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FontSize = 16,
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Padding = new Thickness(0, 10)
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});
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}
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page.Content = new Microsoft.Maui.Controls.ScrollView { Content = scrollContent };
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await Navigation.PushAsync(page);
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})
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},
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new Button
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{
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Text = "CollectionView - Large title with SafeArea",
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Command = new Command(async () =>
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{
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var navPage = (Microsoft.Maui.Controls.NavigationPage)Parent;
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navPage.On<iOS>().SetPrefersLargeTitles(true);
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var page = new ContentPage { Title = "CollectionView Demo", BackgroundColor = Colors.LightBlue };
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page.On<iOS>().SetLargeTitleDisplay(LargeTitleDisplayMode.Always);
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page.SafeAreaEdges = Microsoft.Maui.SafeAreaEdges.All;
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var collectionView = new Microsoft.Maui.Controls.CollectionView
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{
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VerticalOptions = LayoutOptions.Fill
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};
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collectionView.ItemTemplate = new DataTemplate(() =>
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{
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var label = new Label
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{
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Text = "Scroll to see title collapse",
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FontSize = 18,
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Padding = 15
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};
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return label;
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});
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collectionView.ItemsSource = Enumerable.Range(1, 40);
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collectionView.Header = new Label { BackgroundColor = Colors.Pink, Text = "Header", Padding = 10, FontSize = 16 };
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collectionView.Footer = new Label { BackgroundColor = Colors.Yellow, Text = "Footer", Padding = 10, FontSize = 16 };
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page.Content = collectionView;
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await navPage.PushAsync(page);
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})
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},
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new Button
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{
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Text = "Transparent NavBar - Content shows through",
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Command = new Command(async () =>
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{
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var navPage = (Microsoft.Maui.Controls.NavigationPage)Parent;
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navPage.On<iOS>().SetPrefersLargeTitles(true);
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var previousBarColor = navPage.BarBackgroundColor;
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navPage.BarBackgroundColor = Colors.Transparent;
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var page = new ContentPage
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{
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Title = "Transparent Bar",
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// Create a gradient background that shows through the nav bar
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Background = new LinearGradientBrush
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{
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StartPoint = new Point(0, 0),
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EndPoint = new Point(0, 1),
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GradientStops = new GradientStopCollection
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{
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new GradientStop { Color = Color.FromArgb("#667eea"), Offset = 0.0f },
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new GradientStop { Color = Color.FromArgb("#764ba2"), Offset = 1.0f }
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}
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}
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};
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page.On<iOS>().SetLargeTitleDisplay(LargeTitleDisplayMode.Always);
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var scrollContent = new StackLayout { Padding = 20, Spacing = 15 };
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scrollContent.Children.Add(new Label
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{
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Text = "Notice how the gradient background shows through the navigation bar area. This follows Apple's HIG recommendation.",
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FontSize = 16,
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TextColor = Colors.White,
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Margin = new Thickness(0, 20)
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});
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for (int i = 1; i <= 30; i++)
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{
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scrollContent.Children.Add(new Frame
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{
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BackgroundColor = Colors.White.WithAlpha(0.9f),
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CornerRadius = 10,
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Padding = 15,
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Content = new Label
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{
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Text = $"Card {i} - Scroll to see the effect",
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FontSize = 16
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}
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});
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}
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page.Content = new Microsoft.Maui.Controls.ScrollView { Content = scrollContent };
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await Navigation.PushAsync(page);
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// Restore opaque background when returning
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page.Disappearing += (s, e) => navPage.BarBackgroundColor = previousBarColor;
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})
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},
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// Back Button
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new BoxView { HeightRequest = 1, Color = Colors.Gray, Margin = new Thickness(0, 10) },
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new Button
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{
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Text = "← Back To Gallery",
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Margin = new Thickness(0, 10, 0, 20),
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Command = new Command(async () => await Navigation.PopAsync())
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}
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}
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}
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};
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Content = scrollView;
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}
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}

‎src/Controls/samples/Controls.Sample/Pages/PlatformSpecifics/iOS/iOSLargeTitlePage.xaml‎

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‎src/Controls/samples/Controls.Sample/Pages/PlatformSpecifics/iOS/iOSLargeTitlePage.xaml.cs‎

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‎src/Controls/samples/Controls.Sample/ViewModels/OthersViewModel.cs‎

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Original file line numberDiff line numberDiff line change
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new SectionModel(typeof(GraphicsViewPage), "GraphicsView",
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"Allow to draw directly in a Canvas. You can combine a canvas and native Views on the same page."),
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new SectionModel(typeof(LargeTitlesPageiOS), "Large Titles - iOS",
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"This iOS platform-specific is used to display the page title as a large title on the navigation bar of a NavigationPage, for devices that use iOS 11 or greater."),
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new SectionModel(typeof(StyleSheetsPage), "StyleSheets",
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"Demonstrates the usage of CSS in XAML."),
2017

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