2

我想将在我的代码中添加对话框弹出窗口简化为所需的绝对最小值。

目前我有这个代码：

<pages:PopupPage
    x:Class="Test.Popup"
    xmlns="http://xamarin.com/schemas/2014/forms"
    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
    xmlns:pages="clr-namespace:Rg.Plugins.Popup.Pages;assembly=Rg.Plugins.Popup">
    <ContentView HorizontalOptions="FillAndExpand" VerticalOptions="FillAndExpand">
        <t:PopupFrame>
           <Label Text="ABC" />
           <Label Text="ABC" />
        </t:PopupFrame>
    </ContentView>
</pages:PopupPage>

public partial class Popup : Rg.Plugins.Popup.Pages.PopupPage
{
    public Popup()
    {
        InitializeComponent();
    }
}

我在PopupFrame这里：

[Xamarin.Forms.ContentProperty("Contents")]
public class PopupFrame : Frame
{
    StackLayout contentStack { get; } = new StackLayout()
    {
        Spacing = 0,
        Padding = new Thickness(0),
        Orientation = StackOrientation.Vertical
    };
    public IList<View> Contents { get => contentStack.Children; }

    public PopupFrame()
    {
        Content = contentStack;
        HasShadow = true;
        HorizontalOptions = LayoutOptions.FillAndExpand;
        Padding = 0;
        SetDynamicResource(BackgroundColorProperty, "PopUpBackgroundColor");
        SetDynamicResource(CornerRadiusProperty, "PopupCornerRadius");
        VerticalOptions = LayoutOptions.Center;   
    }
}

任何人都可以提出一种方法，我可以将这两者结合起来，以便只需要以下内容：

<t:PopupPage
    x:Class="Test.Popup"
    xmlns="http://xamarin.com/schemas/2014/forms"
    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
    xmlns:t="clr-namespace:Test.Templates">
    <Label Text="ABC" />
    <Label Text="ABC" />
</pages:PopupPage>

所以我正在寻找的是内容：

[Xamarin.Forms.ContentProperty("Contents")]
public class Popup : Rg.Plugins.Popup.Pages.PopupPage 
{
}

更新：这是我根据建议的答案尝试过的：

<?xml version="1.0" encoding="UTF-8" ?>
<pages:PopupPage
    x:Class="Memorise.DecksTab.CopyDeckPopup"
    xmlns="http://xamarin.com/schemas/2014/forms"
    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
    xmlns:pages="clr-namespace:Rg.Plugins.Popup.Pages;assembly=Rg.Plugins.Popup">
    <Label Text="ABC" />
    <Label Text="ABC" />
</pages:PopupPage>

带有支持代码：

[Xamarin.Forms.ContentProperty("Contents")]
[XamlCompilation(XamlCompilationOptions.Compile)]
public partial class CopyDeckPopup : Rg.Plugins.Popup.Pages.PopupPage
{

    PopupFrame contentFrame { get; } = new PopupFrame();

    public IList<View> Contents { get => contentFrame.Contents; }

    public CopyDeckPopup(string clickedDeckName, string clickedDeckDescription)
    {
        BindingContext = new CopyDeckPopupViewModel(clickedDeckName, clickedDeckDescription);
        InitializeComponent();
        Content = new ContentView()
        {
            HorizontalOptions = LayoutOptions.FillAndExpand,
            VerticalOptions = LayoutOptions.FillAndExpand,
            Content = contentFrame
        };
    }

}

它给了我这个错误，但显示是正确的，我看到两个 ABC。

在此处输入图像描述

4

1 回答 1

2

从这段代码：

<pages:PopupPage
    x:Class="Test.Popup"
    xmlns="http://xamarin.com/schemas/2014/forms"
    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
    xmlns:pages="clr-namespace:Rg.Plugins.Popup.Pages;assembly=Rg.Plugins.Popup">
    <ContentView HorizontalOptions="FillAndExpand" VerticalOptions="FillAndExpand">
        <t:PopupFrame>
           <Label Text="ABC" />
           <Label Text="ABC" />
        </t:PopupFrame>
    </ContentView>
</pages:PopupPage>

可以看出ContentPropertyofPopupPage是一个单独的View（上面代码中被a占用了ContentView）。

但是，如果您希望能够编写类似的代码

<t:PopupPage
    x:Class="Test.Popup"
    xmlns="http://xamarin.com/schemas/2014/forms"
    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
    xmlns:t="clr-namespace:Test.Templates">
   <Label Text="ABC" />
   <Label Text="ABC" />
</pages:PopupPage>

那么你希望PopupPage'sContentProperty能够获取项目列表（如Label上面代码中的两个 s ），另外这些项目设置为你的PopupFrame，应该放在ContentView...

您所要做的就是修改PopupPage（我假设它继承自ContentPage[?]）以接受多个项目作为其内容，如下所示

[Xamarin.Forms.ContentProperty("Contents")]
[XamlCompilation(XamlCompilationOptions.Compile)]
public partial class PopupPage : ContentPage
{

    PopupFrame contentFrame { get; } = new PopupFrame();

    public IList<View> Contents { get => contentFrame.Contents; }

    public PopupPage()
    {
        InitializeComponent();
        Content = new ContentView()
        {
            HorizontalOptions = LayoutOptions.FillAndExpand,
            VerticalOptions = LayoutOptions.FillAndExpand,
            Content = contentFrame
        };
    }
}

通过这样做，现在您将能够编写您想要的那种代码

<?xml version="1.0" encoding="utf-8" ?>
<t:PopupPage xmlns="http://xamarin.com/schemas/2014/forms"
    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
    xmlns:t="clr-namespace:popupframe"
    x:Class="popupframe.MainPage">
    <Label Text="Label1"/>
    <Label Text="Label2"/>
</t:PopupPage>
于 2020-11-25T05:46:01.443 回答