public ProgressSpinnerView(CGRect frame, NSProgress progress) : base(frame)
{
// Initialize
Progress = progress;
Progress.AddObserver(this, "fractionCompleted", NSKeyValueObservingOptions.New, IntPtr.Zero);
ArcLayer.Path = UIBezierPath.FromArc(new CGPoint(Bounds.GetMidX(), Bounds.GetMidY()),
(float)(0.2f * Math.Min(Bounds.Width, Bounds.Height)),
(float)(-(Math.PI / 2f)),
(float)(2f * Math.PI - (Math.PI / 2f)),
true).CGPath;
ArcLayer.StrokeColor = TintColor.CGColor;
ArcLayer.FillColor = UIColor.Clear.CGColor;
ArcLayer.LineWidth = 5;
ArcLayer.StrokeStart = 0;
ArcLayer.StrokeEnd = 0;
ArcLayer.Position = CGPoint.Empty;
Layer.AddSublayer(ArcLayer);
BackgroundColor = UIColor.Clear;
Layer.BorderColor = UIColor.LightGray.CGColor;
Layer.BorderWidth = 2;
Layer.CornerRadius = 10;
ProgressLabel.Text = "0%";
ProgressLabel.TextAlignment = UITextAlignment.Center;
ProgressLabel.Frame = Bounds;
AddSubview(ProgressLabel);
}
public void Initialize()
{
progress.AddObserver(this, "fractionCompleted", NSKeyValueObservingOptions.New, progressViewKVOContext);
}