C# StackLayout.TranslateTo方法代码示例

        public DemoPage()
        {
            this.Padding = 0;
            var mainStack = new StackLayout () {
                Padding = new Thickness(0,20,0,0),
                VerticalOptions = LayoutOptions.FillAndExpand,
                HorizontalOptions = LayoutOptions.FillAndExpand,
            };

            listView = new ListView () {};
            listView.ItemsSource = items;
            mainStack.Children.Add (listView);

            textEntry = new Entry () {
                HorizontalOptions = LayoutOptions.FillAndExpand,
                Placeholder = "Type something...",
            };

            var textStack = new StackLayout () {
                Orientation = StackOrientation.Horizontal,
                Padding = 10,
                BackgroundColor = Color.White,
            };
            textStack.Children.Add (textEntry);

            var textButton = new Button () {
                Text = "Post",
                FontAttributes = FontAttributes.Bold,
                FontSize = 16,
                HorizontalOptions = LayoutOptions.End,
            };

            textButton.Clicked += (object sender, EventArgs e) => {
                System.Diagnostics.Debug.WriteLine ("listview height: " + listView.Height);
                items.Add(textEntry.Text);
                textEntry.Text = string.Empty;
                listView.ScrollTo(items.Last(), ScrollToPosition.MakeVisible, true);
            };
            textStack.Children.Add (textButton);
            mainStack.Children.Add (textStack);

            // This works nicely with stacklayouts but causes issues on listviews as they automatically adjust their size
            //			var spacer = new BoxView () {
            //				HorizontalOptions = LayoutOptions.FillAndExpand,
            //				HeightRequest = 0,
            //			};
            //			mainStack.Children.Add (spacer);

            KeyboardHelper.KeyboardChanged += (sender, e) => {
                bottomOffset = mainStack.Bounds.Bottom - textStack.Bounds.Bottom;	// This offset allows us to only raise the stack by the amount required to stay above the keyboard.
                var ty = e.Visible ? -e.Height : -1;
                textStack.TranslateTo(textStack.TranslationX, ty, e.Duration, Easing.CubicInOut);
            //				spacer.HeightRequest = e.Visible ? e.Height : -1;
            };
            this.Content = mainStack;
        }

		public myimagomenu ()
		{
			//http://facchini-ts.it/imagobe/DATABASE/imagolight.txt
			//HttpWebRequest a;
			//HttpClient b = new HttpClient ();
			currentPlataform = DependencyService.Get<platformSpecific> ();

			b1 = new StackLayout {
				BackgroundColor = Color.FromRgb (40, 40, 40),
				//VerticalOptions = LayoutOptions.Center

			};
			b2 = new StackLayout {

				BackgroundColor = Color.FromRgb (60, 60, 60),
			};
			b3 = new StackLayout {

				BackgroundColor = Color.FromRgb (80, 80, 80),
			};

		


			btn1 = new Button (){ Text = "btn1" };
			//b1.Children.Add (btn1);

			btn2 = new Button (){ Text = "btn2" };
			//b2.Children.Add (btn2);


			#region "open"
			btn1.Clicked += async delegate(object sender, EventArgs e) {
				b2.IsVisible = true;
				b3.IsVisible = false;
				await b2.TranslateTo (0, -this.b1H);
			};
			btn2.Clicked += async delegate(object sender, EventArgs e) {
				b1.IsVisible = false;
				b2.IsVisible = true;
				b3.IsVisible = true;
				await b2.TranslateTo (0, 0);
				await b3.TranslateTo (0, -this.b2H);
			};

			#endregion

			#region "close"
			var mygest = new TapGestureRecognizer ();
			mygest.Tapped += async (object sender, EventArgs e) => {
				//b2 b1
				await b2.TranslateTo (0, 0);
				b2.IsVisible = false;
			};
			b1.GestureRecognizers.Add (mygest);


			var mygest2 = new TapGestureRecognizer ();
			mygest2.Tapped += async (object sender, EventArgs e) => {
				if (b1.IsVisible) {
					//b2,b1
					await b2.TranslateTo (0, 0);
				} else {
					//b3 b2
					b3.IsVisible = false;
					b1.IsVisible = true;
					await b2.TranslateTo (0, -this.b1H);
				}
			};
			b2.GestureRecognizers.Add (mygest2);

			var mygest3 = new TapGestureRecognizer ();
			mygest3.Tapped += async (object sender, EventArgs e) => {
				//b3 b2
				b3.IsVisible = false;
				b1.IsVisible = true;
				await b2.TranslateTo (0, -this.b1H);
			};
			b3.GestureRecognizers.Add (mygest3);



			#endregion

			al = new AbsoluteLayout ();

			Content = al;

			this.SizeChanged += async delegate(object sender, EventArgs e) {

				var hMenu = this.Height;
				hMenu += 1;
				//568
				var half = Convert.ToInt32 (hMenu / 2);
				var delta = hMenu - (half * 2);
				b1H = half;
				//b3H += delta;
				b2H = half - 100;
				b3H = half - 200;

//.........这里部分代码省略.........

//.........这里部分代码省略.........

            Image audioRecodeOnButton = new Image
            {
                BackgroundColor = Color.Transparent,
                VerticalOptions = LayoutOptions.Center,
                Source = Device.OnPlatform("mic.png", "mic.png", "//Assets//mic.png"),
            };
            audioRecodeOnHolder = new StackLayout
            {
                Padding = 10,
                VerticalOptions = LayoutOptions.End,
                Children = { audioRecodeOnButton }
            };
            TapGestureRecognizer RecodeOnTapRecognizer = new TapGestureRecognizer();
            audioRecodeOnHolder.GestureRecognizers.Add(RecodeOnTapRecognizer);

            audioRecodeOffButton = new Image
            {
                BackgroundColor = Color.Transparent,
                VerticalOptions = LayoutOptions.Center,
                Source = Device.OnPlatform("turn_off_mic.png", "turn_off_mic.png", "//Assets//turn_off_mic.png"),
            };
            audioRecodeOffHolder = new StackLayout
            {
                BackgroundColor = Color.Transparent,
                Padding = 10,
                VerticalOptions = LayoutOptions.End,
                IsVisible = false,
                Children = { audioRecodeOffButton }
            };
            TapGestureRecognizer RecodeOffTapRecognizer = new TapGestureRecognizer();
            audioRecodeOffHolder.GestureRecognizers.Add(RecodeOffTapRecognizer);

            audioRecodeOffHolder.TranslateTo(0, Device.OnPlatform(audioRecodeOffButton.Y + 60, audioRecodeOffButton.Y + 60, audioRecodeOffButton.Y + 50), 5, null);
            audioRecodeOnHolder.TranslateTo(0, Device.OnPlatform(audioRecodeOffButton.Y + 60, audioRecodeOffButton.Y + 60, audioRecodeOffButton.Y + 50), 5, null);

            RecodeOnTapRecognizer.Tapped += RecodeOnTapRecognizer_Tapped;
            RecodeOffTapRecognizer.Tapped += RecodeOffTapRecognizer_Tapped;

            StackLayout menuPinContainer = new StackLayout
            {
                BackgroundColor = Color.White,
                Orientation = StackOrientation.Vertical,
                HeightRequest = 140,
                WidthRequest = (int)(devWidth * .10),
                Children = {
                    pinButtonHolder, 
                    audioRecodeOnHolder, 
                    audioRecodeOffHolder
                }
            };


            TapGestureRecognizer locationlabelTap = new TapGestureRecognizer();

            locationInfo = new Label();
            locationInfo.TextColor = Constants.BLUE_BG_COLOR;
            locationInfo.BackgroundColor = Color.Transparent;
            locationInfo.FontSize = 12;
            locationInfo.HeightRequest = Device.OnPlatform(15, 25, 25);
            locationInfo.GestureRecognizers.Add(locationlabelTap);
            locationlabelTap.Tapped += OnEditLocationInfo;

            editLocationAndContactsStack = new StackLayout();
            editLocationAndContactsStack.Padding = new Thickness(1, 1, 1, 1);
            editLocationAndContactsStack.BackgroundColor = Color.FromRgb(30, 126, 210);

		private async Task<bool> ApplyAnimation( StackLayout layout )
		{
			await layout.TranslateTo(0, -30, 250, Easing.CubicOut);
			await layout.TranslateTo(0, 0, 250, Easing.CubicOut);
			return true;
		}