Xamarin.Forms.CarouselView doesn't work on iOS

admin

Administrator
Staff member
I have tried to implement Xamarin.Forms.CarouselView for use on both iOS and Android using Xamarin.Forms in Visual Studio. It works perfectly in Android, but it doesn't work on iOS. On iOS it shows the first slide, but it doesn't allow me to swipe right or left to change the current slide. I have installed the NuGet package in both the iOS and Android projects. The XAML looks like this:

Code:
    <cv:CarouselView ItemsSource="{Binding Slider}" x:Name="CarouselSlider">
        <cv:CarouselView.ItemTemplate>
            <DataTemplate>
                <Grid>
                    <Grid.RowDefinitions>
                        <RowDefinition Height="*"/>
                        <!--<RowDefinition Height="Auto"/>-->
                    </Grid.RowDefinitions>
                    <Image Grid.RowSpan="1" Aspect="AspectFill" Source="{Binding ImageUrl}" />
                    <StackLayout BackgroundColor="#7F000000" Padding="12" VerticalOptions="Center" TranslationY="100">
                        <Label TextColor="White" Text="{Binding Title}" FontSize="26" HorizontalOptions="Center" VerticalOptions="CenterAndExpand"/>
                        <Label TextColor="White" Text="{Binding TextBody}" FontSize="16" HorizontalOptions="Center" HorizontalTextAlignment="Center" VerticalOptions="CenterAndExpand"/>
                    </StackLayout>
                </Grid>
            </DataTemplate>
        </cv:CarouselView.ItemTemplate>
    </cv:CarouselView>

And the backend looks like this:

Code:
public partial class MainPage : ContentPage
{
    public System.Collections.ObjectModel.ObservableCollection<SliderContent> Slider { get; set; }

    public MainPage()
    {
        InitializeComponent();
        NavigationPage.SetHasNavigationBar(this, false);

        Slider = new System.Collections.ObjectModel.ObservableCollection<SliderContent>
        {
            new SliderContent
            {
                Id = 1,
                ImageUrl = "https://thumb9.shutterstock.com/display_pic_with_logo/1975943/561919966/stock-photo-brutal-strong-athletic-men-pumping-up-muscles-workout-bodybuilding-concept-background-muscular-561919966.jpg",
                Title = "Aliquam et neque arcu",
                TextBody = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nunc porttitor erat arcu, vitae accumsan odio iaculis et."
            },
                new SliderContent
            {
                Id = 2,
                ImageUrl = "https://ifitlife.files.wordpress.com/2014/06/20140604-155437-57277345.jpg",
                Title = "Donec lobortis sodales dui",
                TextBody = "Morbi congue scelerisque vulputate. Vestibulum sit amet hendrerit justo. Nulla facilisi."
                },
            new SliderContent
            {
                Id = 3,
                ImageUrl = "https://uproxx.files.wordpress.com/2013/05/dmx-black.jpg?quality=100&w=650",
                Title = "Vestibulum arcu elit",
                TextBody = "Aliquam in maximus ante. Suspendisse facilisis posuere nulla quis hendrerit. Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas."
            }
        };

        Grid dotsGrid = DotsIndicator;
        dotsGrid.HorizontalOptions = LayoutOptions.CenterAndExpand;

        dotsGrid.ColumnDefinitions = new ColumnDefinitionCollection
        {
            new ColumnDefinition { Width = new GridLength(1, GridUnitType.Star) },
            new ColumnDefinition { Width = new GridLength(1, GridUnitType.Star) },
            new ColumnDefinition { Width = new GridLength(1, GridUnitType.Star) }
        };

        dotsGrid.RowDefinitions = new RowDefinitionCollection
        {
            new RowDefinition { Height = new GridLength(6, GridUnitType.Star) },
            new RowDefinition { Height = new GridLength(2, GridUnitType.Star) },
            new RowDefinition { Height = new GridLength(6, GridUnitType.Star) }
        };

        int counter = 0;

        foreach (var i in Slider)
        {
            Button label = new Button();
            if (Slider.First() == i)
            {
                label = new Button
                {
                    BackgroundColor = Color.White,
                    BindingContext = i,
                    VerticalOptions = LayoutOptions.Fill,
                    WidthRequest = 20,
                    HeightRequest = 20,
                    BorderRadius = 30
                };
            }
            else
            {
                label = new Button
                {
                    BackgroundColor = Color.Gray,
                    BindingContext = i,
                    VerticalOptions = LayoutOptions.Fill,
                    WidthRequest = 20,
                    HeightRequest = 20,
                    BorderRadius = 30
                };
            }

            dotsGrid.Children.Add(label, counter, 1);
            counter++;
        }

        DotsIndicator = dotsGrid;
        this.BindingContext = this;
        CarouselSlider.ItemSelected += CarouselSlider_ItemSelected;
    }

    private void CarouselSlider_ItemSelected(object sender, SelectedItemChangedEventArgs e)
    {
        var item = e.SelectedItem as SliderContent;
        foreach (var i in DotsIndicator.Children)
        {
            i.BackgroundColor = Color.Gray;
            if (i.BindingContext == item)
            {
                i.BackgroundColor = Color.White;
            }
        }

        return;
    }
}

Are there any known issues using Xamarin.Forms.CarouselView on iOS or am I missing something?