harmony 鸿蒙Navigator

2022-08-09
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Navigator

The <Navigator> component provides redirection.

NOTE

This component is supported since API version 7. Updates will be marked with a superscript to indicate their earliest API version.

Child Components

Supported

APIs

Navigator(value?: {target: string, type?: NavigationType})

Parameters

Name	Type	Mandatory	Description
target	string	Yes	Path of the target page to be redirected to.
type	NavigationType	No	Navigation type. Default value: NavigationType.Push

NavigationType

Name	Description
Push	Navigates to the specified page in the application.
Replace	Replaces the current page with another one in the application and destroys the current page.
Back	Returns to the specified page. If the specified page does not exist in the stack, no response is returned. If no page is specified, the previous page is returned to.

Attributes

Name	Parameter	Description
active	boolean	Whether the <Navigator> component is activated. If the component is activated, the corresponding navigation takes effect.
params	object	Data that needs to be passed to the target page during redirection. You can use router.getParams() to obtain the data on the target page.
target	string	Path of the target page to be redirected to. The target page must be added to the main_pages.json file.
type	NavigationType	Navigation type. Default value: NavigationType.Push

Example

// Navigator.ets
@Entry
@Component
struct NavigatorExample {
  @State active: boolean = false
  @State name: NameObject = { name: 'news' }

  build() {
    Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Start, justifyContent: FlexAlign.SpaceBetween }) {
      Navigator({ target: 'pages/container/navigator/Detail', type: NavigationType.Push }) {
        Text('Go to ' + this.name.name + ' page')
          .width('100%').textAlign(TextAlign.Center)
      }.params(new TextObject(this.name)) // Pass parameters to the Detail page.

      Navigator() {
        Text('Back to previous page').width('100%').textAlign(TextAlign.Center)
      }.active(this.active)
      .onClick(() => {
        this.active = true
      })
    }.height(150).width(350).padding(35)
  }
}

interface NameObject {
  name: string;
}

class TextObject {
  text: NameObject;

  constructor(text: NameObject) {
    this.text = text;
  }
}

// Detail.ets
import router from '@ohos.router'

@Entry
@Component
struct DetailExample {
  // Receive the input parameters of Navigator.ets.
  params: Record<string, NameObject> = router.getParams() as Record<string, NameObject>
  @State name: NameObject = this.params.text

  build() {
    Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Start, justifyContent: FlexAlign.SpaceBetween }) {
      Navigator({ target: 'pages/container/navigator/Back', type: NavigationType.Push }) {
        Text('Go to back page').width('100%').height(20)
      }

      Text('This is ' + this.name.name + ' page')
        .width('100%').textAlign(TextAlign.Center)
    }
    .width('100%').height(200).padding({ left: 35, right: 35, top: 35 })
  }
}

interface NameObject {
  name: string;
}

// Back.ets
@Entry
@Component
struct BackExample {
  build() {
    Column() {
      Navigator({ target: 'pages/container/navigator/Navigator', type: NavigationType.Back }) {
        Text('Return to Navigator Page').width('100%').textAlign(TextAlign.Center)
      }
    }.width('100%').height(200).padding({ left: 35, right: 35, top: 35 })
  }
}

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