Xamarin Forms - перетаскивание в CollectionView (средство визуализации) - PullRequest
Новая
       59

Xamarin Forms - перетаскивание в CollectionView (средство визуализации)

4 голосов
/ 28 мая 2020

Как реализовать функцию простого перетаскивания в CollectionView в Xamarin Forms? Без использования стороннего пакета NUGET. Ниже приведен код простого представления коллекции, но теперь мне нужно его визуализировать ... Как визуализировать и реализовать перетаскивание, чтобы изменить порядок чисел? enter image description here

Xaml 

<CollectionView ItemsSource="{Binding Stores}"
                     x:Name="CV"
                             VerticalOptions="Center"   
                             HorizontalOptions="Center"   
                             BackgroundColor="#F9F9F9"  
                             Margin="10,100,10,10">
        <CollectionView.ItemsLayout>
            <GridItemsLayout Orientation="Vertical" Span="3"/>
        </CollectionView.ItemsLayout>
        <CollectionView.ItemTemplate>
            <DataTemplate>
                <StackLayout Padding="10" HorizontalOptions="CenterAndExpand">
                    <Frame BorderColor="LightGray" HasShadow="True" Padding="5" HorizontalOptions="CenterAndExpand">
                        <Grid Padding="5" ColumnSpacing="0" RowSpacing="0" Margin="2" HorizontalOptions="StartAndExpand">
                            <Grid.ColumnDefinitions>
                                <ColumnDefinition Width="Auto"/>
                            </Grid.ColumnDefinitions>
                            <Label Grid.Column="0" Text="{Binding Id}" HorizontalOptions="CenterAndExpand" HorizontalTextAlignment="Center" VerticalOptions="CenterAndExpand" FontAttributes="Bold"/>
                        </Grid>
                    </Frame>
                </StackLayout>
            </DataTemplate>
        </CollectionView.ItemTemplate>
    </CollectionView>

.CS файл 

public partial class MainPage : ContentPage
{
    public List<Store> storelist;

    public MainPage()
    {
        InitializeComponent();
        storelist = new List<Store>();
        BindingContext = this;
        storelist.Add(new Store() { Id = 1, ImageUrl = "https://cdn.shopify.com/s/files/1/1104/4168/products/Allbirds_W_Wool_Runner_Kotare_GREY_ANGLE_0f3bfe63-ac7d-4106-9acf-d26f8414ac53_600x600.png", IsLike = true, Price = 21.00, Title = "Title" });
        storelist.Add(new Store() { Id = 2, ImageUrl = "https://cdn.shopify.com/s/files/1/1104/4168/products/Allbirds_W_Wool_Runner_Kotare_GREY_ANGLE_0f3bfe63-ac7d-4106-9acf-d26f8414ac53_600x600.png", IsLike = true, Price = 88.12, Title = "Title" });
        storelist.Add(new Store() { Id = 3, ImageUrl = "https://cdn.shopify.com/s/files/1/1104/4168/products/Allbirds_W_Wool_Runner_Kotare_GREY_ANGLE_0f3bfe63-ac7d-4106-9acf-d26f8414ac53_600x600.png", IsLike = true, Price = 65.21, Title = "Title" });
        storelist.Add(new Store() { Id = 4, ImageUrl = "https://cdn.shopify.com/s/files/1/1104/4168/products/Allbirds_W_Wool_Runner_Kotare_GREY_ANGLE_0f3bfe63-ac7d-4106-9acf-d26f8414ac53_600x600.png", IsLike = true, Price = 39.95, Title = "Title" });
        storelist.Add(new Store() { Id = 5, ImageUrl = "https://cdn.shopify.com/s/files/1/1104/4168/products/Allbirds_W_Wool_Runner_Kotare_GREY_ANGLE_0f3bfe63-ac7d-4106-9acf-d26f8414ac53_600x600.png", IsLike = true, Price = 958.99, Title = "Title" });
        storelist.Add(new Store() { Id = 6, ImageUrl = "https://cdn.shopify.com/s/files/1/1104/4168/products/Allbirds_W_Wool_Runner_Kotare_GREY_ANGLE_0f3bfe63-ac7d-4106-9acf-d26f8414ac53_600x600.png", IsLike = true, Price = 64.85, Title = "Title" });
        storelist.Add(new Store() { Id = 7, ImageUrl = "https://cdn.shopify.com/s/files/1/1104/4168/products/Allbirds_W_Wool_Runner_Kotare_GREY_ANGLE_0f3bfe63-ac7d-4106-9acf-d26f8414ac53_600x600.png", IsLike = true, Price = 2050.55, Title = "Title" });
        storelist.Add(new Store() { Id = 8, ImageUrl = "https://cdn.shopify.com/s/files/1/1104/4168/products/Allbirds_W_Wool_Runner_Kotare_GREY_ANGLE_0f3bfe63-ac7d-4106-9acf-d26f8414ac53_600x600.png", IsLike = true, Price = 120500.00, Title = "Title" });
        storelist.Add(new Store() { Id = 9, ImageUrl = "https://cdn.shopify.com/s/files/1/1104/4168/products/Allbirds_W_Wool_Runner_Kotare_GREY_ANGLE_0f3bfe63-ac7d-4106-9acf-d26f8414ac53_600x600.png", IsLike = true, Price = 21.00, Title = "Title" });
        storelist.Add(new Store() { Id = 10, ImageUrl = "https://cdn.shopify.com/s/files/1/1104/4168/products/Allbirds_W_Wool_Runner_Kotare_GREY_ANGLE_0f3bfe63-ac7d-4106-9acf-d26f8414ac53_600x600.png", IsLike = true, Price = 88.12, Title = "Title" });
        storelist.Add(new Store() { Id = 11, ImageUrl = "https://cdn.shopify.com/s/files/1/1104/4168/products/Allbirds_W_Wool_Runner_Kotare_GREY_ANGLE_0f3bfe63-ac7d-4106-9acf-d26f8414ac53_600x600.png", IsLike = true, Price = 65.21, Title = "Title" });
        storelist.Add(new Store() { Id = 12, ImageUrl = "https://cdn.shopify.com/s/files/1/1104/4168/products/Allbirds_W_Wool_Runner_Kotare_GREY_ANGLE_0f3bfe63-ac7d-4106-9acf-d26f8414ac53_600x600.png", IsLike = true, Price = 39.95, Title = "Title" });
        storelist.Add(new Store() { Id = 13, ImageUrl = "https://cdn.shopify.com/s/files/1/1104/4168/products/Allbirds_W_Wool_Runner_Kotare_GREY_ANGLE_0f3bfe63-ac7d-4106-9acf-d26f8414ac53_600x600.png", IsLike = true, Price = 958.99, Title = "Title" });
        storelist.Add(new Store() { Id = 14, ImageUrl = "https://cdn.shopify.com/s/files/1/1104/4168/products/Allbirds_W_Wool_Runner_Kotare_GREY_ANGLE_0f3bfe63-ac7d-4106-9acf-d26f8414ac53_600x600.png", IsLike = true, Price = 64.85, Title = "Title" });
        storelist.Add(new Store() { Id = 15, ImageUrl = "https://cdn.shopify.com/s/files/1/1104/4168/products/Allbirds_W_Wool_Runner_Kotare_GREY_ANGLE_0f3bfe63-ac7d-4106-9acf-d26f8414ac53_600x600.png", IsLike = true, Price = 2050.55, Title = "Title" });
        storelist.Add(new Store() { Id = 16, ImageUrl = "https://cdn.shopify.com/s/files/1/1104/4168/products/Allbirds_W_Wool_Runner_Kotare_GREY_ANGLE_0f3bfe63-ac7d-4106-9acf-d26f8414ac53_600x600.png", IsLike = true, Price = 120500.00, Title = "Title" });

        CV.ItemsSource = storelist;
    }
}

public class Store
{
    public int Id { get; set; }
    public bool IsLike { get; set; }
    public string ImageUrl { get; set; }
    public string Title { get; set; }
    public double Price { get; set; }
    public string Favorite { get; set; } = "favorite.png";

}
...