目录
MAUI中Windows默认的标题栏颜色是灰色的,有一点丑。
如果去掉默认的标题栏,自己画一个,可能会出现问题,也比较麻烦。
想要自定义默认标题栏的颜色,官方又没有提供接口。找过了很多资料,也用过很多办法,始终不能完美的解决这个问题,大多数只是类似于配置的修改,不能在运行时修改颜色。
直到看到一位大佬的文章https://www.dongchuanmin.com/net/2955.html ,终于有了眉目。
在Win10和Win11中都可以正常用。
修改默认颜色
找到Platforms/Windows/App.xaml
<maui:MauiWinUIApplication
x:Class="MauiApp1.WinUI.App"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:maui="using:Microsoft.Maui"
xmlns:local="using:MauiApp1.WinUI">
<Application.Resources>
<ResourceDictionary>
<SolidColorBrush x:Key="WindowCaptionBackground">#fff</SolidColorBrush>
<SolidColorBrush x:Key="WindowCaptionBackgroundDisabled">#fff</SolidColorBrush>
<SolidColorBrush x:Key="WindowCaptionForeground">#000</SolidColorBrush>
<SolidColorBrush x:Key="WindowCaptionForegroundDisabled">#000</SolidColorBrush>
</ResourceDictionary>
</Application.Resources>
</maui:MauiWinUIApplication>
修改运行时颜色
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安装NuGet包
NuGet包中搜索 PInvoke.User32 ,安装它
特别提示
项目文件中请务必按照下面这样写,否则打包的时候其他平台也会将PInvoke.User32这个包打进去,实际上是完全无用的,它只适用于Windows。
``` <PackageReference Include="PInvoke.User32" Version="0.7.124" Condition="$(TargetFramework.Contains('-windows')) == true" /> ```
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添加修改标题栏颜色的类
Platforms/Windows文件夹下添加
WindowsTitleBar.cs
using Microsoft.Maui.Platform; using PInvoke; using WinRT.Interop; using static PInvoke.User32; namespace MauiApp1 { # nullable disable public static class WindowsTitleBar { private static Microsoft.UI.Xaml.Window GetActiveNativeWindow() => (Microsoft.UI.Xaml.Window)Application.Current.Windows.FirstOrDefault()?.Handler?.PlatformView; public static void SetColorForWindows(Color backgroundColor,Color foregroundColor) { var res = Microsoft.UI.Xaml.Application.Current.Resources; res["WindowCaptionBackground"] = backgroundColor.ToWindowsColor(); res["WindowCaptionBackgroundDisabled"] = backgroundColor.ToWindowsColor(); res["WindowCaptionForeground"] = foregroundColor.ToWindowsColor(); res["WindowCaptionForegroundDisabled"] = foregroundColor.ToWindowsColor(); TriggertTitleBarRepaint(); } private static bool TriggertTitleBarRepaint() { #if WINDOWS var nativeWindow = GetActiveNativeWindow(); if (nativeWindow is null) { return default; } var hWnd = WindowNative.GetWindowHandle(nativeWindow); var activeWindow = User32.GetActiveWindow(); if (hWnd == activeWindow) { User32.PostMessage(hWnd, WindowMessage.WM_ACTIVATE, new IntPtr((int)0x00), IntPtr.Zero); User32.PostMessage(hWnd, WindowMessage.WM_ACTIVATE, new IntPtr((int)0x01), IntPtr.Zero); } else { User32.PostMessage(hWnd, WindowMessage.WM_ACTIVATE, new IntPtr((int)0x01), IntPtr.Zero); User32.PostMessage(hWnd, WindowMessage.WM_ACTIVATE, new IntPtr((int)0x00), IntPtr.Zero); } #endif return true; } } }
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调用
#if WINDOWS var backgroundColor = Colors.White; var foreColor = Colors.Black; WindowsTitleBar.SetColorForWindows(backgroundColor, foreColor); #endif