xamarin.forms - Scroll horizontally in Xamarin.Forms ScrollView

Question

I am using Xamarin.Forms and have created a ScrollView, which contains a horizontal StackLayout. I want to be able to scroll horizontally, so I set:

Orientation  = ScrollOrientation.Horizontal;

But I don't get horizontal scroll. The content of the StackLayout is wider than the screen, and I see the content is being clipped at the edge.

How do I achieve horizontal scroll with Xamarin.Forms ?

Answer 1

这就是我让它工作的方式

      var scrollView = ScrollView
        {
            HorizontalOptions = LayoutOptions.Fill,
            Orientation = ScrollOrientation.Horizontal,

            Content = new StackLayout{
               Orientation = StackOrientation.Horizontal,
               Children = {}
            }
        };

Answer 2

这个 nuget 包将起作用：

https://github.com/SuavePirate/DynamicStackLayout

属性 Words 是一个字符串列表：

    <ScrollView Orientation="Horizontal" HorizontalOptions="FillAndExpand">
        <dynamicStackLayout:DynamicStackLayout ItemsSource="{Binding Words}" HorizontalOptions="Fill" Orientation="Horizontal" Padding="10, -0, 50, 10">
            <dynamicStackLayout:DynamicStackLayout.ItemTemplate>
                <DataTemplate>
                    <StackLayout BackgroundColor="Gray" WidthRequest="80" HeightRequest="80">
                        <Label Text="{Binding .}" VerticalOptions="FillAndExpand" HorizontalOptions="FillAndExpand" VerticalTextAlignment="Center" HorizontalTextAlignment="Center" />
                    </StackLayout>
                </DataTemplate>
            </dynamicStackLayout:DynamicStackLayout.ItemTemplate>
        </dynamicStackLayout:DynamicStackLayout>
    </ScrollView>

我希望它有帮助:)

Answer 3

如果您在 Visual Studio 2013 中为 Xamarin 应用程序使用模板，则 Xamarin.Forms 的版本有点过时并且不支持滚动。要解决此问题，只需 nuget 'update-package' 和此代码

public class MainPage : ContentPage
{
    public MainPage()
    {
        Label label = new Label {
            Text = "This is a very long label which I expect to scroll horizontally because it's in a ScrollView.",
            Font = Font.SystemFontOfSize(24),
        };

        this.Content = new ScrollView {
            Content = label,
            Orientation = ScrollOrientation.Horizontal, 
        };
    }
}

代码在android上可以正常工作。

对于 iOS，代码将按预期工作。

不幸的是，目前 WP8 存在一个错误，而破解方法是添加一个自定义渲染器。

using System.Windows.Controls;
using App2.WinPhone;
using Xamarin.Forms;
using Xamarin.Forms.Platform.WinPhone;

[assembly: ExportRenderer(typeof(ScrollView), typeof(FixedSVRenderer))]

namespace App2.WinPhone
{
    public sealed class FixedSVRenderer : ScrollViewRenderer
    {
        protected override void OnModelSet()
        {
            base.OnModelSet();

            if (Model.Orientation == ScrollOrientation.Horizontal)
            {
                // Enable horiz-scrolling
                Control.HorizontalScrollBarVisibility = ScrollBarVisibility.Auto;
            }
        }
    }
}