系统Tabs组件用法有哪些？

@Entry  
@Component  
export struct Index{  
  
  private tabArray:string[] = ['A','B']  
  @State focusIndex:number = 0  
  private controller: TabsController = new TabsController()  
  
  build() {  
    Column(){  
      Scroll() {  
        Row() {  
          ForEach(this.tabArray, (item: number, index: number) => {  
            Row({ space: 20 }) {  
              Text('页签' + item)  
                .fontWeight(index === this.focusIndex ? FontWeight.Bold : FontWeight.Normal)  
            }  
            .padding({ left: '10fp', right: '10fp' })  
            .onClick(() => {  
              this.controller.changeIndex(index)  
              this.focusIndex = index  
            })  
          })  
        }  
      }  
      .align(Alignment.Start)  
      .scrollable(ScrollDirection.Horizontal)  
      .scrollBar(BarState.Off)  
      .width('100%')  
  
      //tabs组件把tabbar隐藏  
      Tabs({ barPosition: BarPosition.Start, controller: this.controller }) {  
        ForEach(this.tabArray, (item: number, index: number) => {  
          TabContent() {  
            Text('我是页面 ' + item + " 的内容")  
              .fontSize(30)  
          }  
        })  
      }.barHeight(0)  
    }  
    .height('100%')  
    .width('100%')  
  }  
}
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