在 Xamarin.FORMS 中的设计器中预览字体

Question

I made a Xamarin.Forms project and I referenced my own font and then added an alias in the assembly like so:

[assembly: ExportFont("Samantha.ttf", Alias = "MyAwesomeCustomFont")]

Now... the thing is, this font which I have referenced is NOT being shown in the designer, instead I'm still getting the default font, even after referencing it:

<Button WidthRequest="70" Text="Click me" FontFamily="MyAwesomeCustomFont"/>

Now, this is frustrating because it is working when I deploy it and it showing the font although I want the designer to illustrate exactly what's going on, so I do want the custom font to be shown in the designer... Is this possible?

Thanks,

Answer 1

I've solved my own problem. I created a custom renderer and it's showing in the preview:

[assembly: ExportRenderer(typeof(Xamarin.Forms.Button), typeof(CustomButtonRenderer))]
namespace Custombutton.Droid
{
    class CustomButtonRenderer : ButtonRenderer
    {
        public CustomButtonRenderer(Context context) : base(context)
        {

        }

        protected override void OnElementChanged(ElementChangedEventArgs<Xamarin.Forms.Button> e)
        {
            base.OnElementChanged(e);
            if (Control != null)
            {
                Control.SetAllCaps(false);
                Typeface tf = Typeface.CreateFromAsset(Android.App.Application.Context.Assets, "NUNITO-BOLD.ttf");
                Control.SetTypeface(tf, TypefaceStyle.Bold);


            }
        }
    }
}

Result in designer: