HarmonyOS 选项卡 (Tabs)跨越切换时，会加载所有跨越的TabContent

@Entry 
@Component 
struct Index3 { 
  @State currentIndex: number = 0 
  @State tabContentArr: boolean[] = [true, false, false, false] 
  tabContents: string[] = ["首页", "推荐", "发现", "我的"] 
 
  build() { 
    Row() { 
      Column() { 
        Tabs({ barPosition: BarPosition.End }) { 
          ForEach(this.tabContents, (item:string, index) => { 
            TabContent() { 
              if (this.currentIndex === index || this.tabContentArr[index]) { 
                Text(this.tabContents[this.currentIndex]) 
              } 
            }.tabBar(item) 
          }) 
        } 
        .onChange((index) => { 
          this.currentIndex = index 
          this.tabContentArr[index] = true 
        }) 
      } 
      .width('100%') 
    } 
    .height('100%') 
  } 
}