Xamarin表单: IOS中的Progressbar高度问题

using Xamarin.Forms;

namespace YourAppName.Controls
{
    public class CustomProgressBar : ProgressBar
    {
    }
}

using YourAppName.Controls;
using YourAppName.iOS.Renderers;
using Xamarin.Forms;
using Xamarin.Forms.Platform.iOS;

[assembly: ExportRenderer(typeof(CustomProgressBar), typeof(CustomProgressBarRenderer))]
namespace YourAppName.iOS.Renderers
{
    public class CustomProgressBarRenderer : ProgressBarRenderer
    {
        protected override void OnElementChanged(ElementChangedEventArgs<ProgressBar> e)
        {
            base.OnElementChanged(e);

            if (Control != null)
            {
                Control.HeightRequest = 10; // 设置Progressbar的高度
            }
        }
    }
}