Navigation

The <Navigation> component typically functions as the root container of a page and displays the title bar, toolbar, and navigation bar based on the attribute settings.

NOTE

This component is supported since API version 8. Updates will be marked with a superscript to indicate their earliest API version.

Child Components

Supported

Since API version 9, it is recommended that this component be used together with the <NavRouter> component.

APIs

Navigation

Navigation()

Navigation¹⁰⁺

Navigation(pathInfos: NavPathStack)

Binds a navigation stack to the <Navigation> component.

Parameters

Attributes

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

Events

NavPathStack¹⁰⁺

Implements a navigation stack.

pushPath¹⁰⁺

pushPath(info: NavPathInfo): void

Pushes the navigation destination page specified by info to the navigation stack.

Parameters

pushPathByName¹⁰⁺

pushPathByName(name: string, param: unknown): void

Pushes the navigation destination page specified by name to the navigation stack.

Parameters

pop¹⁰⁺

pop(): NavPathInfo|undefined

Pops the top element out of the navigation stack.

Return value

popToName¹⁰⁺

popToName(name: string): number

Returns the navigation stack to the first navigation destination page that matches the value of name.

Parameters

Return value

popToIndex¹⁰⁺

popToIndex(index: number): void

Returns the navigation stack to the navigation destination page that matches the value of index.

Parameters

moveToTop¹⁰⁺

moveToTop(name: string): number

Moves to the top of the navigation stack the first navigation destination page that matches the value of name.

Parameters

Return value

moveIndexToTop¹⁰⁺

moveIndexToTop(index: number): void

Moves to the top of the navigation stack the navigation destination page that matches the value of index.

Parameters

clear¹⁰⁺

clear(): void

Clears the navigation stack.

getAllPathName¹⁰⁺

getAllPathName(): Array

Obtains the names of all navigation destination pages in the navigation stack.

Return value

getParamByIndex¹⁰⁺

getParamByIndex(index: number): unknown|undefined

Obtains the parameter information of the navigation destination page that matches the value of index.

Parameters

Return value

getParamByName¹⁰⁺

getParamByName(name: string): Array

Obtains the parameter information of all the navigation destination pages that match the value of name.

Parameters

Return value

getIndexByName¹⁰⁺

getIndexByName(name: string): Array

Obtains the indexes of all the navigation destination pages that match the value of name.

Parameters

Return value

size¹⁰⁺

size(): number

Obtains the stack size.

Return value

NavPathInfo¹⁰⁺

Describes the navigation page information.

constructor

constructor(name: string, param: unknown)

Parameters

NavigationMenuItem

object

ToolbarItem¹⁰⁺

ToolbarItemStatus¹⁰⁺

NavigationTitleMode

NavigationCommonTitle

NavigationCustomTitle

NavBarPosition

NavigationMode

TitleHeight

NOTE

Among the scrollable components, only <List> is supported.

Example

Example 1

// xxx.ets
class A {
  text: string = ''
  num: number = 0
}

@Entry
@Component
struct NavigationExample {
  private arr: number[] = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
  @State currentIndex: number = 0

  @Builder NavigationTitle() {
    Column() {
      Text('Title')
        .fontColor('#182431')
        .fontSize(30)
        .lineHeight(41)
        .fontWeight(700)
      Text('subtitle')
        .fontColor('#182431')
        .fontSize(14)
        .lineHeight(19)
        .opacity(0.4)
        .margin({ top: 2, bottom: 20 })
    }.alignItems(HorizontalAlign.Start)
  }

  @Builder NavigationMenus() {
    Row() {
      Image('common/ic_public_add.svg')
        .width(24)
        .height(24)
      Image('common/ic_public_add.svg')
        .width(24)
        .height(24)
        .margin({ left: 24 })
      Image('common/ic_public_more.svg')
        .width(24)
        .height(24)
        .margin({ left: 24 })
    }
  }

  build() {
    Column() {
      Navigation() {
        TextInput({ placeholder: 'search...' })
          .width('90%')
          .height(40)
          .backgroundColor('#FFFFFF')
          .margin({ top: 8 })

        List({ space: 12, initialIndex: 0 }) {
          ForEach(this.arr, (item: number) => {
            ListItem() {
              Text('' + item)
                .width('90%')
                .height(72)
                .backgroundColor('#FFFFFF')
                .borderRadius(24)
                .fontSize(16)
                .fontWeight(500)
                .textAlign(TextAlign.Center)
            }.editable(true)
          }, (item: number) => item.toString())
        }
        .height(324)
        .width('100%')
        .margin({ top: 12, left: '10%' })
      }
      .title(this.NavigationTitle)
      .menus(this.NavigationMenus)
      .titleMode(NavigationTitleMode.Full)
      .toolbarConfiguration([
        {
          value: $r("app.string.navigation_toolbar_add"),
          icon: $r("app.media.ic_public_highlightsed")
        },
        {
          value: $r("app.string.navigation_toolbar_app"),
          icon: $r("app.media.ic_public_highlights")
        },
        {
          value: $r("app.string.navigation_toolbar_collect"),
          icon: $r("app.media.ic_public_highlights")
        }
      ])
      .hideTitleBar(false)
      .hideToolBar(false)
      .onTitleModeChange((titleModel: NavigationTitleMode) => {
        console.info('titleMode' + titleModel)
      })
    }.width('100%').height('100%').backgroundColor('#F1F3F5')
  }
}

Example 2

// Index.ets
import { pageOneTmp } from './pageOne'
import { pageTwoTmp } from './pageTwo'
import { pages }  from './pageTwo'

@Entry
@Component
struct NavigationExample {
  @Provide('pageInfos') pageInfos: NavPathStack = new NavPathStack()

  @Builder
  PageMap(name: string) {
    if (name === 'pageOne') {
      pageOneTmp()
    } else if (name === 'pageTwo') {
      pageTwoTmp({ names: name, values: this.pageInfos } as pages)
    }
  }

  build() {
    Navigation(this.pageInfos) {
      Column() {
        Button('pushPath', { stateEffect: true, type: ButtonType.Capsule })
          .width('80%')
          .height(40)
          .margin(20)
          .onClick(() => {
            this.pageInfos.pushPath({ name:'pageOne'}) // Push the navigation destination page specified by name to the navigation stack.
          })
      }
    }.title('NavIndex').navDestination(this.PageMap)
  }
}

// pageOne.ets
class tmpClass{
  count:number=10
}
@Component
export struct pageOneTmp {
  @Consume('pageInfos') pageInfos: NavPathStack;

  build() {
    NavDestination() {
      Column() {
        Button('pushPathByName', { stateEffect: true, type: ButtonType.Capsule })
          .width('80%')
          .height(40)
          .margin(20)
          .onClick(() => {
            let tmp = new tmpClass()
            this.pageInfos.pushPathByName('pageTwo', tmp) // Push the navigation destination page specified by name to the navigation stack, with the data specified by param passed in.
          })
        Button('popToname', { stateEffect: true, type: ButtonType.Capsule })
          .width('80%')
          .height(40)
          .margin(20)
          .onClick(() => {
            this.pageInfos.popToName('pageTwo') // Return the navigation stack to the first navigation destination page that matches the value of name.
            console.log('popToName' + JSON.stringify(this.pageInfos), 'Return value' + JSON.stringify(this.pageInfos.popToName('pageTwo')))
          })
        Button('popToIndex', { stateEffect: true, type: ButtonType.Capsule })
          .width('80%')
          .height(40)
          .margin(20)
          .onClick(() => {
            this.pageInfos.popToIndex(1) // Return the navigation stack to the navigation destination page that matches the value of index.
            console.log('popToIndex' + JSON.stringify(this.pageInfos))
          })
        Button('moveToTop', { stateEffect: true, type: ButtonType.Capsule })
          .width('80%')
          .height(40)
          .margin(20)
          .onClick(() => {
            this.pageInfos.moveToTop('pageTwo') // Move to the top of the navigation stack the first navigation destination page that matches the value of name.
            console.log('moveToTop' + JSON.stringify(this.pageInfos), 'Return value' + JSON.stringify(this.pageInfos.moveToTop('pageTwo')))
          })
        Button('moveIndexToTop', { stateEffect: true, type: ButtonType.Capsule })
          .width('80%')
          .height(40)
          .margin(20)
          .onClick(() => {
            this.pageInfos.moveIndexToTop(1) // Move to the top of the navigation stack the navigation destination page that matches the value of index.
            console.log('moveIndexToTop' + JSON.stringify(this.pageInfos))
          })
        Button('clear', { stateEffect: true, type: ButtonType.Capsule })
          .width('80%')
          .height(40)
          .margin(20)
          .onClick(() => {
            this.pageInfos.clear() // Clear the navigation stack.
          })
        Button('get', { stateEffect: true, type: ButtonType.Capsule })
          .width('80%')
          .height(40)
          .margin(20)
          .onClick(() => {
            console.log('-------------------')
            console.log('Obtained the names of all pages in the navigation stack', JSON.stringify(this.pageInfos.getAllPathName()))
            console.log('Obtained parameter information of the navigation destination page specified by index', JSON.stringify(this.pageInfos.getParamByIndex(1)))
            console.log('Obtained parameter information of all the navigation destination pages specified by name', JSON.stringify(this.pageInfos.getParamByName('pageTwo')))
            console.log('Obtained the index information of all the navigation destination pages specified by name', JSON.stringify(this.pageInfos.getIndexByName('pageOne'))))
            console.log ('Obtained the stack size', JSON.stringify (this.pageInfos.size ()))
          })
      }.width('100%').height('100%')
    }.title('pageOne')
    .onBackPressed(() => {
      this.pageInfos.pop() // Pop the top element out of the navigation stack.
      console.log ('pop' + 'Return value' + JSON.stringify (this.pageInfos.pop ()))
      return true
    })
  }
}

// pageTwo.ets

export class pages {
  names: string = ""
  values: NavPathStack|null = null
}

@Builder
export function pageTwoTmp(info: pages) {
  NavDestination() {
    Column() {
      Button('pushPathByName', { stateEffect: true, type: ButtonType.Capsule })
        .width('80%')
        .height(40)
        .margin(20)
        .onClick(() => {
          (info.values as NavPathStack).pushPathByName('pageOne', null)
        })
    }.width('100%').height('100%')
  }.title('pageTwo')
  .onBackPressed(() => {
    (info.values as NavPathStack).pop()
    return true
  })
}

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