HarmonyOS Tab组件里的tabBar点击如何拦截，根据情况判断是否允许切换tab？

Question

Tab组件里的tabBar点击如何拦截，根据情况判断是否允许切换tab

Answer 1

暂时没有tabBar点击拦截功能实现，可以使用TabsController自定义页签以及并在其中添加事件进行逻辑判断，参考demo如下：

export class ButtonInfoModel {
  index: number = 0;
  info: string = 'home';
  title: string = 'Home';
}

const buttonInfo: ButtonInfoModel[] = [
  {
    index: 0,
    info: 'home',
    title: 'Home'
  },
  {
    index: 1,
    info: 'map',
    title: 'Map'
  },
  {
    index: 2,
    info: 'charging',
    title: 'Charging'
  }
]

@Component
export struct Home {
  @State message: string = 'Home';

  build() {
    Row() {
      Column() {
        Text(this.message)
          .fontSize(50)
          .fontWeight(FontWeight.Bold)
        Text('点击之后无法进入charging页，会跳转map页')
          .fontSize(20)
          .fontWeight(FontWeight.Bold)
          .onClick(() => {
            buttonInfo[2].info = "map"
          })
      }
      .width('100%')
    }
    .height('100%')
  }
}

@Component
export struct Map {
  @State message: string = 'Map';

  build() {
    Row() {
      Column() {
        Text(this.message)
          .fontSize(50)
          .fontWeight(FontWeight.Bold)
      }
      .width('100%')
    }
    .height('100%')
  }
}

@Component
export struct Charging {
  @State message: string = 'Charging';

  build() {
    Row() {
      Column() {
        Text(this.message)
          .fontSize(50)
          .fontWeight(FontWeight.Bold)
      }
      .width('100%')
    }
    .height('100%')
  }
}