张高兴的 UWP 开发笔记：手机状态栏 StatusBar

<Page
    x:Class="StatusBarDemo.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:StatusBarDemo"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d">

    <Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto" />
            <RowDefinition Height="Auto" />
            <RowDefinition Height="Auto" />
            <RowDefinition Height="*" />
        </Grid.RowDefinitions>

        <TextBlock Text="Status Bar Demo" FontSize="35" Margin="15" />

        <StackPanel Grid.Row="1" Margin="15">
            <TextBlock Text="Show or hide status bar" />
            <RadioButton Name="Show" GroupName="ShowOrHide" IsChecked="True" Checked="RadioButton_Checked">Show</RadioButton>
            <RadioButton Name="Hide" GroupName="ShowOrHide" Checked="RadioButton_Checked">Hide</RadioButton>
        </StackPanel>

        <StackPanel Grid.Row="2" Margin="15">
            <TextBlock Text="Change status bar background color" />
            <RadioButton Name="Black" GroupName="Color" IsChecked="True" Checked="Color_Checked">Black</RadioButton>
            <RadioButton Name="White" GroupName="Color" Checked="Color_Checked">White</RadioButton>
            <RadioButton Name="Accent" GroupName="Color" Checked="Color_Checked">System Accent Color</RadioButton>
        </StackPanel>

        <StackPanel Grid.Row="3" Margin="15">
            <TextBlock Text="Change status bar background opacity" />
            <Slider Name="Opacity" Minimum="0" Maximum="10" Value="10" ValueChanged="Opacity_ValueChanged" />
        </StackPanel>

    </Grid>
</Page>

using System;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.ViewManagement;
using Windows.Foundation.Metadata;
using Windows.UI;
using Windows.UI.Xaml.Media;


namespace StatusBarDemo
{
    public sealed partial class MainPage : Page
    {
        StatusBar statusBar;
        // 获取系统当前颜色
        SolidColorBrush accentColor = (SolidColorBrush)Application.Current.Resources["SystemControlBackgroundAccentBrush"];

        public MainPage()
        {
            // 判断是否存在 StatusBar
            if (ApiInformation.IsTypePresent("Windows.UI.ViewManagement.StatusBar"))
            {
                statusBar = StatusBar.GetForCurrentView();
            }
            else
            {
                Application.Current.Exit();
            }

            this.InitializeComponent();
        }

        // 显示，隐藏
        private async void RadioButton_Checked(object sender, RoutedEventArgs e)
        {
            RadioButton r = sender as RadioButton;

            if (r.Name == "Show")
            {
                await statusBar.ShowAsync(); 
            }
            else
            {
                await statusBar.HideAsync();
            }
        }

        // 颜色
        private void Color_Checked(object sender, RoutedEventArgs e)
        {
            RadioButton r = sender as RadioButton;

            if (r.Name == "Black")
            {
                statusBar.BackgroundColor = Colors.Black;
                statusBar.ForegroundColor = Colors.White;  
            }
            else if(r.Name == "White")
            {
                statusBar.BackgroundColor = Colors.White;
                statusBar.ForegroundColor = Colors.Black;
                statusBar.BackgroundOpacity = 1;
            }
            else
            {
                statusBar.BackgroundColor = accentColor.Color;
                statusBar.ForegroundColor = Colors.Black;
                statusBar.BackgroundOpacity = 1;
            }
        }

        // 透明度
        private void Opacity_ValueChanged(object sender, Windows.UI.Xaml.Controls.Primitives.RangeBaseValueChangedEventArgs e)
        {
            statusBar.BackgroundOpacity = Opacity.Value / 10;
        }
    }
}