HarmonyOS Tab居中问题

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能否左对齐？给Tab自身设置了.alignSelf(ItemAlign.Start).align(Alignment.Start)无效。

HarmonyOS

fox280

2024-12-26 14:22:14

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回答 1

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回答 1

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Heiang

当前Tab组件不支持居左显示，可以自定义实现。参考demo如下：

@Entry
@Component
export default struct SegmentTabView {
  private controller: TabsController = new TabsController()
  @State tabs: string[] = ['新能源', "选车"];
  @State currentIndex: number = 0;
  @Builder
  TabBuilder(tabName: string, index: number) {
    Column() {
      Text(tabName)
        .fontColor(Color.Black)
        .fontSize(this.currentIndex === index ? 19 : 16)
        .fontWeight(this.currentIndex === index ? 800 : 400)
        .margin({ left: 10, right: 10 })
      Image($r('app.media.startIcon'))
        .margin({ top: 5 })
        .width(17)
        .height(5)
        .visibility(this.currentIndex === index ? Visibility.Visible : Visibility.Hidden)
    }.justifyContent(FlexAlign.Center).onClick(() => {
      this.currentIndex = index
      this.controller.changeIndex(index)
    })
  }
  build() {
    Column() {
      //自定义点击控件
      Scroll() {
        Row() {
          ForEach(this.tabs, (tabName: string, index: number) => {
            this.TabBuilder(tabName, index)
          })
        }.alignSelf(ItemAlign.Start)
      }
      .align(Alignment.Start)
      .scrollable(ScrollDirection.Horizontal)
      .scrollBar(BarState.Off)
      .width('100%')
      // 设置tabs高度为0隐藏
      Tabs({ barPosition: BarPosition.Start, controller: this.controller }) {
        ForEach(this.tabs, (item: number, index: number) => {
          TabContent() {
            Text('我是页面 ' + item + " 的内容").fontSize(30)
          }
        })
      }.barHeight(0)
    }.width('100%')
  }
}