Xamarin.Forms应用程序中的MasterDetailPage

是否可以在

Xamarin.Forms

中创建类似的侧菜单

---

如果您不想使用内置的“主/详细信息”滑出页面，因为它太宽且无法轻松调整大小，您可能需要使用滑出套件

它是一个免费的开源组件，应该允许您做您需要的事情

我搜索一个小菜单。将尺寸宽度修改为母版页

您可以在

MasterDetailPageRenderer

中更改

Master

页面的宽度

首先，在自定义

MasterDetailPage

类中创建一个

BindableProperty

：

public class MyMasterDetailPage : MasterDetailPage
{
    public static readonly BindableProperty DrawerWidthProperty =
          BindableProperty.Create(
              "WidthRatio",
              typeof(int),
              typeof(MyMasterDetailPage),
              (float)0.2,
              propertyChanged: (bindable, oldValue, newValue) =>
              {
              });

    public float WidthRatio
    {
        get { return (float)GetValue(WidthRatioProperty); }
        set { SetValue(WidthRatioProperty, value); }
    }
}

其次，在

MasterDetailPageRenderer

中，将

MyMasterDetailPage

宽度设置如下：

[assembly: ExportRenderer(typeof(MyMasterDetailPage), typeof(MyMasterDetailPageRenderer))]
...
public class MyMasterDetailPageRenderer : MasterDetailPageRenderer
{
    protected override void OnElementChanged(VisualElement oldElement, VisualElement newElement)
    {
        base.OnElementChanged(oldElement, newElement);

        var width = Resources.DisplayMetrics.WidthPixels;

        var fieldInfo = GetType().BaseType.GetField("_masterLayout", System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.NonPublic);
        var _masterLayout = (ViewGroup)fieldInfo.GetValue(this);
        var lp = new DrawerLayout.LayoutParams(_masterLayout.LayoutParameters);

        MyMasterDetailPage page = (MyMasterDetailPage)newElement;
        lp.Width = (int)(page.WidthRatio * width);

        lp.Gravity = (int)GravityFlags.Left;
        _masterLayout.LayoutParameters = lp;
    }
}

public App()
{
    InitializeComponent();

    var mdp = new MyMasterDetailPage
    {
        Master = new MenuPage() { Title = "Master" },
        Detail = new ContentPage
        {
            BackgroundColor = Color.White,
            Title = "DetailPage",
            Content = new Label
            {
                Text = "DetailPage",
                HorizontalTextAlignment = TextAlignment.Center,
                VerticalTextAlignment = TextAlignment.Center,
            },
        },
        WidthRatio = 0.5f,
    };
    MainPage = mdp;
}

用法，在我的

App.xaml.cs

中，我将页面设置如下：

[assembly: ExportRenderer(typeof(MyMasterDetailPage), typeof(MyMasterDetailPageRenderer))]
...
public class MyMasterDetailPageRenderer : MasterDetailPageRenderer
{
    protected override void OnElementChanged(VisualElement oldElement, VisualElement newElement)
    {
        base.OnElementChanged(oldElement, newElement);

        var width = Resources.DisplayMetrics.WidthPixels;

        var fieldInfo = GetType().BaseType.GetField("_masterLayout", System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.NonPublic);
        var _masterLayout = (ViewGroup)fieldInfo.GetValue(this);
        var lp = new DrawerLayout.LayoutParams(_masterLayout.LayoutParameters);

        MyMasterDetailPage page = (MyMasterDetailPage)newElement;
        lp.Width = (int)(page.WidthRatio * width);

        lp.Gravity = (int)GravityFlags.Left;
        _masterLayout.LayoutParameters = lp;
    }
}

public App()
{
    InitializeComponent();

    var mdp = new MyMasterDetailPage
    {
        Master = new MenuPage() { Title = "Master" },
        Detail = new ContentPage
        {
            BackgroundColor = Color.White,
            Title = "DetailPage",
            Content = new Label
            {
                Text = "DetailPage",
                HorizontalTextAlignment = TextAlignment.Center,
                VerticalTextAlignment = TextAlignment.Center,
            },
        },
        WidthRatio = 0.5f,
    };
    MainPage = mdp;
}

更新： 关于

Xamarin.iOS

，受其启发，您可以参考，唯一需要做的事情是在中更改此行：

---

母版详细信息页面的左侧只是一个垂直堆栈布局，因此您可以根据需要设计它。请参阅此repo：谢谢@OrcusZ，@Himanshu Dwivedi，但这不是我要找的，我已经看到了此解决方案，但不是他的，我搜索了一个小菜单。将尺寸宽度修改为母版页