Xamarin表单标签无法以斜体显示中文字符

using Xamarin.Forms;

namespace YourNamespace
{
    public class ItalicLabel : Label
    {
    }
}

using Xamarin.Forms;
using YourNamespace;
using YourNamespace.iOS;
using UIKit;

[assembly: ExportRenderer(typeof(ItalicLabel), typeof(ItalicLabelRenderer))]
namespace YourNamespace.iOS
{
    public class ItalicLabelRenderer : LabelRenderer
    {
        protected override void OnElementChanged(ElementChangedEventArgs<Label> e)
        {
            base.OnElementChanged(e);

            if (Control != null)
            {
                Control.Font = UIFont.ItalicSystemFontOfSize(Control.Font.PointSize);
            }
        }
    }
}

using Xamarin.Forms;
using YourNamespace;
using YourNamespace.Droid;
using Android.Graphics;

[assembly: ExportRenderer(typeof(ItalicLabel), typeof(ItalicLabelRenderer))]
namespace YourNamespace.Droid
{
    public class ItalicLabelRenderer : LabelRenderer
    {
        protected override void OnElementChanged(ElementChangedEventArgs<Label> e)
        {
            base.OnElementChanged(e);

            if (Control != null)
            {
                Control.Typeface = Typeface.Create(Typeface.Default, TypefaceStyle.Italic);
            }
        }
    }
}

<YourNamespace:ItalicLabel Text="你的中文字符" />