This arrangement ensures that the first Label is always on-screen, while text displayed by the other Label objects can be scrolled: The ScrollView has a StackLayout as its content, with the StackLayout containing multiple Label objects. The first StackLayout is the root layout object, which has a Label object and a ScrollView as its children. In this example, there are two StackLayout objects. The following XAML example has a ScrollView as a child layout to a StackLayout: This will cause the StackLayout to give the ScrollView all the extra space not required by the other children, and the ScrollView will then have a specific height. To handle this scenario, the VerticalOptions property of the ScrollView should be set to FillAndExpand. The StackLayout wants the ScrollView to be as short as possible, which is either the height of the ScrollView contents or zero. When a ScrollView is the child of a StackLayout, it doesn't receive a specific height.
A ScrollView requires a specific height to compute the difference between the height of its content and its own height, with the difference being the amount that the ScrollView can scroll its content. ScrollView as a child layoutĪ ScrollView can be a child layout to a different parent layout.Ī ScrollView will often be the child of a StackLayout. ScrollView scrollView = new ScrollView įor more information about bindable layouts, see Bindable Layouts in Xamarin.Forms. StackLayout stackLayout = new StackLayout() īindableLayout.SetItemsSource(stackLayout, NamedColor.All) īindableLayout.SetItemTemplate(stackLayout, dataTemplate) Orientation = StackOrientation.Horizontal, StackLayout horizontalStackLayout = new StackLayout Label.SetBinding(Label.TextProperty, "FriendlyName")
#PRINT MULTI HEADER VIEW IN TAP FORMS CODE#
The equivalent C# code is: public class ColorListPageCode : ContentPageĭataTemplate dataTemplate = new DataTemplate(() =>īoxView.SetBinding(BoxView.ColorProperty, "Color") By default, a ScrollView scrolls vertically, which reveals more content: In this example, the ScrollView has its content set to a StackLayout that uses a bindable layout to display the Color fields defined by Xamarin.Forms. The following XAML example has a ScrollView as a root layout on a page: While Xamarin.Forms protects against this eventuality, it's best to avoid code that suggests something you don't want to happen. Doing so tells the ScrollView to be only as tall as it needs to be, which could be zero. In a vertical ScrollView, avoid setting the VerticalOptions property to Start, Center, or End. The Content property is the ContentProperty of the ScrollView class, and therefore does not need to be explicitly set from XAML. These properties are backed by BindableProperty objects, with the exception of the Content property, which means that they can be targets of data bindings and styled. VerticalScrollBarVisibility, of type ScrollBarVisibility, represents when the vertical scroll bar is visible.
The default value of this read-only property is 0. ScrollY, of type double, indicates the current Y scroll position.ScrollX, of type double, indicates the current X scroll position.The default value of this property is Vertical.
0 kommentar(er)
