如何在Xamarin中实现ListView的DataTemplate的子项的方法。表格

问题描述：

我有ListView，我给它分配了DataTemplate。现在我有一些控件，如按钮，图像和标签。现在我想对该控件的单击事件进行一些操作。如何在Xamarin中实现ListView的DataTemplate的子项的方法。表格

我的ListView就像是这个 -

listof_ingredients_and_lifestyleDiets = new ListView 
{ 
BackgroundColor = Color.FromHex ("#CDBA96"), 
ItemTemplate = preferenceTableCell, 
SeparatorColor =Color.FromHex("#CDBA96"), 
RowHeight=40, 
HeightRequest=200 
};

我的DataTemplate就像是这个 -

DataTemplate preferenceTableCell = new DataTemplate (() => { 
       var itemName = new Label {    
        HorizontalOptions = LayoutOptions.Center, 
        VerticalOptions = LayoutOptions.Center, 
        WidthRequest=80, 
        FontSize=14, 
        TextColor=ColorResources.TextColor, 
       }; 
       itemName.SetBinding (Label.TextProperty, "Name"); 


       var radiobtn_allergen = new CircleImage { 
        BorderColor = ColorResources.commonButtonBackgroundColor, 
        HeightRequest = 25, 
        WidthRequest = 25, 
        Aspect = Aspect.AspectFill, 
        HorizontalOptions = LayoutOptions.Center, 
        VerticalOptions = LayoutOptions.Center, 
        Source="radio_Check.png" 
       }; 
radiobtn_allergen.SetBinding(CircleImage.IsVisibleProperty,"isExcluded"); 

       var radiobtn_preference = new CircleImage { 
        BorderColor = ColorResources.commonButtonBackgroundColor, 
        HeightRequest = 25, 
        WidthRequest = 25, 
        Aspect = Aspect.AspectFill, 
        HorizontalOptions = LayoutOptions.Center, 
        VerticalOptions = LayoutOptions.Center, 
        Source="radio_uncheck.png", 
       };radiobtn_preference.SetBinding (CircleImage.IsVisibleProperty, "isExcluded"); 

       var btnDelete=new Button{ 
        Image="deleteBtn.png", 
        HorizontalOptions=LayoutOptions.EndAndExpand, 
        HeightRequest=50, 
        WidthRequest=30 
       }; 

       StackLayout stacklayout = new StackLayout { 
        Spacing = 60, 
        Orientation = StackOrientation.Horizontal, 
        HorizontalOptions = LayoutOptions.FillAndExpand, 
        Children = { itemName,radiobtn_allergen,radiobtn_preference,btnDelete } 
       }; 
       return new ViewCell { View = stacklayout }; 
      });

现在的问题是，我要实现对图像自来水和按钮单击事件的按钮控制点触手势。这个怎么做？

你可以考虑使用'ContextActions'你'DataTemplate'如果是有意义的，你的应用程序，因为这是一个非常常见的交互，并在每个平台上以本地方式工作。与试图在可点击的ListView行中点击按钮相比，ContextActions在小屏幕上工作起来要容易得多。查看'ContextActions' [here]（https://developer.xamarin.com/guides/xamarin-forms/user-interface/listview/interactivity/#Context_Actions） – hvaughan3

答

一个按钮

btnDelete.Clicked += ((sender, args) => { 
     // perform actions here 
    });

点击处理程序附加手势识别到图像

TapGestureRecognizer tapped = new TapGestureRecognizer(); 
tapped.Tapped += ((o2, e2) => 
    { 
     // perform actions here 
    }); 

img.GestureRecognizers.Add(tapped);

如何在Xamarin中实现ListView的DataTemplate的子项的方法。表格

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