Can I customize the Infinite Scroll Plugin for different platforms in MvvmCross

Understanding MvvmCross

MvvmCross is a framework that allows you to share code across multiple platforms, including iOS, Android, and UWP. It provides a robust architecture for building cross-platform applications but does not include an infinite scroll feature out of the box.

Implementing Infinite Scroll

To implement infinite scrolling in MvvmCross, you can use platform-specific controls or behaviors. For example:

- Android and iOS: You can use native list controls like `ListView` on Android or `UITableView` on iOS. These controls can be extended to support infinite scrolling by handling scroll events and loading more data when the user reaches the end of the list.

- Xamarin.Forms: If you're using Xamarin.Forms, you can leverage the `CollectionView` or `ListView` controls. The `CollectionView` has built-in support for infinite scrolling through its `RemainingItemsThreshold` property, which allows you to specify when to load more items[7].

Customizing for Different Platforms

Using Platform-Specific Code

To customize infinite scrolling for different platforms, you can use platform-specific code within your MvvmCross project. This involves creating platform-specific implementations of your view models or views.

1. Platform-Specific Views: You can create platform-specific views that handle infinite scrolling differently. For example, on Android, you might use a `ListView` with a custom adapter to handle scrolling, while on iOS, you might use a `UITableView` with a custom data source.

2. Platform-Specific View Models: You can also create platform-specific view models that handle the logic for loading more data when the user scrolls to the end of the list.

Using Third-Party Libraries

Another approach is to use third-party libraries that provide infinite scrolling functionality. For Xamarin.Forms, libraries like `Xamarin.Forms.Extended` offer behaviors that can be easily integrated into your application to enable infinite scrolling[4].

Example with Xamarin.Forms CollectionView

If you're using Xamarin.Forms, you can implement infinite scrolling using the `CollectionView`. Here's a simplified example:

xml

    

In your view model, you would handle the logic for loading more items when the threshold is reached:

csharp
public class MyViewModel : MvxViewModel
{
    private bool _isBusy;
    private ObservableCollection _items;

    public ObservableCollection Items
    {
        get => _items;
        set => SetProperty(ref _items, value);
    }

    public MyViewModel()
    {
        Items = new ObservableCollection();
    }

    public async Task LoadMoreItemsAsync()
    {
        if (_isBusy) return;

        _isBusy = true;
        // Load more items from your data source
        var moreItems = await LoadItemsFromSourceAsync();
        foreach (var item in moreItems)
        {
            Items.Add(item);
        }
        _isBusy = false;
    }
}

You would then bind the `RemainingItemsThreshold` event to call `LoadMoreItemsAsync` when necessary.

Conclusion

While MvvmCross does not provide a built-in infinite scroll plugin, you can achieve this functionality by using platform-specific controls or third-party libraries. Customization for different platforms involves using platform-specific code or leveraging features of cross-platform controls like Xamarin.Forms' `CollectionView`.