突出显示XamForms日历中的日期

using Xamarin.Forms;

namespace YourNamespace
{
    public class CustomCalendar : Calendar
    {
        // Add any additional properties or methods you need
    }
}

using System;
using YourNamespace;
using YourNamespace.iOS;
using Xamarin.Forms;
using Xamarin.Forms.Platform.iOS;

[assembly: ExportRenderer(typeof(CustomCalendar), typeof(CustomCalendarRenderer))]
namespace YourNamespace.iOS
{
    public class CustomCalendarRenderer : CalendarRenderer
    {
        protected override void OnElementChanged(ElementChangedEventArgs<Calendar> e)
        {
            base.OnElementChanged(e);

            if (Control != null)
            {
                // Customize the appearance of the calendar here
                // For example, you can change the background color of selected dates
                Control.SelectedBackgroundColor = UIColor.Red;
            }
        }
    }
}

using System;
using YourNamespace;
using YourNamespace.Droid;
using Xamarin.Forms;
using Xamarin.Forms.Platform.Android;

[assembly: ExportRenderer(typeof(CustomCalendar), typeof(CustomCalendarRenderer))]
namespace YourNamespace.Droid
{
    public class CustomCalendarRenderer : CalendarRenderer
    {
        protected override void OnElementChanged(ElementChangedEventArgs<Calendar> e)
        {
            base.OnElementChanged(e);

            if (Control != null)
            {
                // Customize the appearance of the calendar here
                // For example, you can change the text color of selected dates
                Control.SelectedDateTextColor = Android.Graphics.Color.Red;
            }
        }
    }
}

<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:local="clr-namespace:YourNamespace"
             x:Class="YourNamespace.YourPage">
    <local:CustomCalendar />
</ContentPage>