C# (CSharp) Gradient.AddStep示例

        private async void WalletsScrolled(object sender, Xamarin.Forms.ScrolledEventArgs e)
        {
            var xOffset = e.ScrollX;

            var max = TopScrollView.ContentSize.Width;
            var w   = BULFrameView.WidthRequest;

            if (w <= 0)
            {
                w = 290;
            }

            if (xOffset > ((max - w) / 2))
            {
                Unfocus();

                Gradient.Steps = null;

                Gradient.AddStep(Color.FromHex("#39C8C8"), 0);
                Gradient.AddStep(Color.FromHex("#53E1E1"), 1);

                await TransactionsBULScrollView.FadeTo(0);

                await TransactionsBULScrollView.ScaleTo(0.8f);

                TransactionsXLMScrollView.IsVisible = true;
                TransactionsBULScrollView.IsVisible = false;

                await TransactionsXLMScrollView.FadeTo(1);

                await TransactionsXLMScrollView.ScaleTo(1);
            }
            else
            {
                Unfocus();

                Gradient.Steps = null;

                Gradient.AddStep(Color.FromHex("#4D64E8"), 0);
                Gradient.AddStep(Color.FromHex("#6786EF"), 1);


                await TransactionsBULScrollView.FadeTo(1);

                await TransactionsBULScrollView.ScaleTo(1);

                TransactionsXLMScrollView.IsVisible = false;
                TransactionsBULScrollView.IsVisible = true;

                await TransactionsXLMScrollView.FadeTo(0);

                await TransactionsXLMScrollView.ScaleTo(0.8f);
            }
        }