单击后StackLayout或Grid中的波纹效果

问题描述 投票:0回答:1

如何在点击后实现StackLayout或Grid中背景颜色平滑变化的效果?如果我们创建一个按钮,它开箱即用 - 我在附加的GIF中显示了这个效果。 ListView中的ViewCell也是如此。点击后它也会产生改变背景颜色的连锁效果。但是如何实现StackLayout或Grid?enter image description here

如何实现这一目标

xamarin.forms grid effect ripple stacklayout
1个回答
2
投票

解决方案1:

您认为ViewCell具有在单击后更改背景颜色的连锁效果。您可以将Stacklayout或Grid放在只有一个ViewCell的列表视图中。

在xaml

<StackLayout>


    <ListView x:Name="listView">

        <ListView.ItemTemplate>

            <DataTemplate>

                <ViewCell>

                    <StackLayout>

                      <Label TextColor="Black" Text="{Binding Content}"/>

                    </StackLayout>

                </ViewCell>

            </DataTemplate>

        </ListView.ItemTemplate>

    </ListView>

</StackLayout>

在代码背后

public class Data
{
    public string Content { get; set; }
}


public partial class MainPage : ContentPage
{

    public ObservableCollection<Data> MySource { get; set; }

    public MainPage()
    {
        InitializeComponent();

        BindingContext = this;



        MySource = new ObservableCollection<Data>()
        {
          new Data() {Content="Click Me" },
        };

        listView.ItemsSource = MySource;

    }

}

解决方案2:

你可以使用nuget包TouchView

将nuget包添加到您的Xamarin.Forms .netStandard / PCL项目以及特定于平台的项目(iOS和Android)

iOS:将TouchViewRenderer.Initialize()行添加到AppDelegate(从链接器保留)

using TouchEffect.iOS;
namespace YourApp.iOS
{
    public partial class AppDelegate : global::Xamarin.Forms.Platform.iOS.FormsApplicationDelegate
    {
        public override bool FinishedLaunching(UIApplication app, NSDictionary options)
        {
            global::Xamarin.Forms.Forms.Init();
            TouchViewRenderer.Initialize();
            LoadApplication(new App());
            return base.FinishedLaunching(app, options);
        }
    }
}

在xaml

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:local="clr-namespace:YourApp"
             xmlns:touch="clr-namespace:TouchEffect;assembly=TouchEffect"
             x:Class="App11.MainPage">

    <StackLayout>
        <touch:TouchView
            RegularBackgroundColor="LightGray"
            PressedBackgroundColor="Gray"
            PressedOpacity="1"       

            PressedAnimationDuration="100"
            RegularAnimationDuration="100"
            Padding="10, 5"
            VerticalOptions="CenterAndExpand"
            HorizontalOptions="CenterAndExpand"
            Completed="Handle_TouchCompleted"
           >

            <Label Text="Click Me" 
                   TextColor="Black" 
                   FontSize="30"/>

        </touch:TouchView>
    </StackLayout>

</ContentPage>

在代码背后

private void Handle_TouchCompleted(TouchEffect.TouchView sender, TouchEffect.EventArgs.TouchCompletedEventArgs args)
 {
    // do something you want        
 }
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