public override void Draw(CGRect rect)
{
CAGradientLayer gradient = new CAGradientLayer();
gradient.Frame = NativeView.Bounds;
gradient.NeedsDisplayOnBoundsChange = true;
gradient.MasksToBounds = true;
gradient.Colors = new CGColor[] { StartColor.ToCGColor(), EndColor.ToCGColor() };
NativeView.Layer.InsertSublayer(gradient, 0);
base.Draw(rect);
}
private void SetGradientBackground()
{
if (NavigationController != null)
{
var gradientLayer = new CAGradientLayer();
gradientLayer.Bounds = NavigationController.NavigationBar.Bounds;
gradientLayer.Colors = new CGColor[] { StartColor.ToCGColor(), EndColor.ToCGColor() };
gradientLayer.StartPoint = new CGPoint(0.0, 0.5);
gradientLayer.EndPoint = new CGPoint(1.0, 0.5);
UIGraphics.BeginImageContext(gradientLayer.Bounds.Size);
gradientLayer.RenderInContext(UIGraphics.GetCurrentContext());
UIImage image = UIGraphics.GetImageFromCurrentImageContext();
UIGraphics.EndImageContext();
NavigationController.NavigationBar.SetBackgroundImage(image, UIBarMetrics.Default);
}
}