HarmonyOS navigation主页面生命周期

// 子页面  
@Component  
struct Page01 {  
  @Consume('pageInfos') pageInfos: NavPathStack;  
  build() {  
    NavDestination() {  
      Button('push Page01')  
        .width('80%')  
        .onClick(() => {  
          this.pageInfos.pushPathByName('Page01', '');  
        }).margin({top: 10, bottom: 10})  
      Button('push Dialog01').width('80%')  
        .onClick(() => {  
          this.pageInfos.pushPathByName('Dialog01', '');  
        }).margin({top: 10, bottom: 10})  
    }.title('Page01')  
  }  
}  
  
@Component  
struct Dialog01 {  
  @Consume('pageInfos') pageInfos: NavPathStack;  
  build() {  
    NavDestination() {  
      Stack() {  
        Column()  
          .width('100%')  
          .height('100%')  
          .backgroundColor(Color.Gray)  
          .opacity(0.1)  
          .onClick(() => {  
            this.pageInfos.pop();  
          })  
        Column() {  
          Text('Dialog01').fontSize(30).fontWeight(2)  
          Button('push Page01').width('80%')  
            .onClick(() => {  
              this.pageInfos.pushPathByName('Page01', '');  
            })  
            .margin({top: 10, bottom: 10})  
          Button('push Dialog01').width('80%')  
            .onClick(() => {  
              this.pageInfos.pushPathByName('Dialog01', '');  
            })  
            .margin({top: 10, bottom: 10})  
          Button('pop').width('80%')  
            .onClick(() => {  
              this.pageInfos.pop();  
            })  
            .margin({top: 10, bottom: 10})  
        }  
        .padding(10)  
        .width(250)  
        .backgroundColor(Color.White)  
        .borderRadius(10)  
      }  
    }  
    .hideTitleBar(true)  
    .mode(NavDestinationMode.DIALOG)  
  
@Entry  
@Component  
struct Index {  
  @Provide('pageInfos') pageInfos: NavPathStack = new NavPathStack() // 创建NavPathStack对象pageInfos  
  isLogin: boolean = false;  
  
// 构建路由表pageMap，该方法通过@Builder进行修饰，通过传入的name属性，返回不同页面。  
  @Builder  
  PagesMap(name: string) {  
    if (name == 'Page01') {  
      Page01()  
    } else if (name == 'Dialog01') {  
  Dialog01()  
}  
}  
build() {  
  // 在build创建Navigation组件（需要传入pageInfos参数），通过navDestination属性传入路由表pageMap，并通过pageInfos.pushPathByName实现页面跳转。  
  Navigation(this.pageInfos) {  
    Button('push Page01')  
      .width('80%')  
      .onClick(() => {  
        this.pageInfos.pushPathByName('Page01', '');  
      })  
  }  
  .mode(NavigationMode.Stack)  
  .titleMode(NavigationTitleMode.Mini)  
  .title('主页')  
  .navDestination(this.PagesMap)  
}  
}
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