HarmonyOS 用Navigation显示dialog问题

用Navigation显示dialog问题。在A（Navigation）页面弹出B（NavDestination、NavDestinationMode.DIALOG）dialog显示正常，然后B跳转页面C（NavDestination），侧滑返回 B dialog 显示背景变白色，具体代码看demo。请问怎么解决？

HarmonyOS

zbw_apple

2024-10-22 11:23:02

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回答 1

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zxjiu

因为navigation的布局是stack，弹出的页面B设置了透明度0.1，所以可以看到下层的页面A。但从C返回B时，只有页面B，所以显示背景变白色，这边建议A页面先跳转到B页面，B页面再弹出弹框，此时弹框再跳转到其他页面时，不会再出现背景页面不展示现象。

代码如下：

//主页面  
build() {  
  Navigation(this.pageInfos) {  
    Button('push Page01')  
      // Button('push Dialog01')  
      .width('80%')  
      .onClick(() => {  
        this.pageInfos.pushPathByName('Page01', ''); //此处先跳转page01  
      })  
  }  
  .mode(NavigationMode.Stack)  
  .titleMode(NavigationTitleMode.Mini)  
  .title('主页')  
  .navDestination(this.PagesMap)  
}  
}  
  
//dialog弹框组件  
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 Page02')  
          .width('80%')  
          .onClick(() => {  
            this.pageInfos.pushPathByName('Page02', ''); //Dialog01弹框处再跳转page02（两层页面弹框跳转后再返回页面，背景不会消失）  
          })1.
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C页面返回B页面时A页面不显示是因为A页面没有放在路由栈里，可以将A页面路由放在aboutToAppear生命周期中，参考代码如下：

@Entry  
@Component  
struct Index {  
  @Provide('pageInfos') pageInfos: NavPathStack = new NavPathStack()  
  isLogin: boolean = false;  
  @State pathUrl:Array<string> = [];  
  
  @Builder  
  PagesMap(name: string) {  
    if (name == 'Page00') {  
      Page00()  
    } else if (name == 'Page01') {  
      Page01()  
    } else if (name == 'Dialog01') {  
      Dialog01()  
    } else if (name == 'Page02') {  
      Page02()  
    }  
  }  
  
  aboutToAppear() {  
    if (this.pageInfos === undefined) {  
      this.pageInfos = new NavPathStack();  
    }  
    this.pageInfos.pushPath({name: 'Page00'}, false)  
  }  
  
  build() {  
    Navigation(this.pageInfos) {}  
    .mode(NavigationMode.Stack)  
    .titleMode(NavigationTitleMode.Mini)  
    .title('主页')  
    .navDestination(this.PagesMap)  
    .backgroundColor('pink')  
    .width('100%')  
    .height('100%')  
    .border({width:3})  
  }  
  
  onBackPress(): boolean | void {  
    console.log("onBackPress", "Index")  
  }  
}  
  
@Component  
struct Page00 {  
  @Consume('pageInfos') pageInfos: NavPathStack;  
  build() {  
    NavDestination() {  
      Button('push Dialog')  
        .width('80%')  
        .onClick(() => {  
          this.pageInfos.pushPathByName('Dialog01', '');  
          console.log('[LOG]getAllPathName-Page02',this.pageInfos.getAllPathName())  
        })  
    }  
  }  
}  
  
@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 })  
    }  
    .hideTitleBar(true)  
  }  
}  
  
@Component  
struct Page02 {  
  @Consume('pageInfos') pageInfos: NavPathStack;  
  
  build() {  
    NavDestination() {  
      Button('push Page02')  
        .width('80%')  
        .onClick(() => {  
        })  
        .margin({ top: 10, bottom: 10 })  
    }  
    .onBackPressed(()=>{  
      console.log('[LOG]getAllPathName-Page02',this.pageInfos.getAllPathName());  
      return false;  
    })  
    .hideTitleBar(true)  
  }  
}  
  
@Preview({  
  title: 'Dialog01'  
})  
  
@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();  
          })  
        // Add controls for business processing  
        Column() {  
          Text('Dialog01')  
            .fontSize(30)  
            .fontWeight(2)  
          Button('push Page02')  
            .width('80%')  
            .onClick(() => {  
              this.pageInfos.pushPathByName('Page02', '');  
              console.log('[LOG]getAllPathName-Dialog01',this.pageInfos.getAllPathName())  
            })  
            .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)  
    // Set the mode property of this NavDestination to DIALOG  
    .mode(NavDestinationMode.DIALOG)  
    .onBackPressed(() => {  
      console.log('[LOG]getAllPathName-Dialog01Back',this.pageInfos.getAllPathName())  
      return this.onBackPress();  
    })  
  }  
  
  onBackPress(): boolean {  
    console.log("onBackPress", "Dialog01")  
    return false  
  }  
}1.
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2024-10-22 16:31:27

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