harmony 鸿蒙NavDestination

2022-12-13
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NavDestination

<NavDestination> is a child component of the <NavRouter> component and represents a destination in the navigation area.

NOTE

This component is supported since API version 9. Updates will be marked with a superscript to indicate their earliest API version.

Child Components

Supported types of child components: built-in components and custom components, with support for (if/else, ForEach, and LazyForEach) rendering control.

Number of child components: multiple.

APIs

NavDestination()

Attributes

In addition to the backgroundColor attribute, the following attributes are supported.

Name	Type	Description
title	string \|CustomBuilder \|NavigationCommonTitle \|NavigationCustomTitle	Page title. NOTE When the NavigationCustomTitle type is used to set the height, the titleMode attribute does not take effect. When the title string is too long: (1) If no subtitle is set, the string is scaled down, wrapped in two lines, and then clipped with an ellipsis (…). (2) If a subtitle is set, the subtitle is scaled down and then clipped with an ellipsis (…).
hideTitleBar	boolean	Whether to hide the title bar. Default value: false true: Hide the title bar. false: Display the title bar.

Events

In addition to the universal events, the following events are supported.

Name	Description
onShown(callback: () => void)¹⁰⁺	Called when the navigation destination page is displayed.
onHidden(callback: () => void)¹⁰⁺	Called when the navigation destination page is hidden.
onBackPressed(callback: () => boolean)¹⁰⁺	Called when the back button is pressed. The value true means that the back button logic is overridden, and false means that the previous page is displayed.