HarmonyOS TabContent无法套用在子组件

Tabs() {  
        CaseDialog()  
  }
1.
2.
3.

TabContent(){  
   //someview  
}.onWillShow(()=>{  
              console.log('onWillShow')             
            })  
            .onWillHide(()=>{  
              console.log('onWillHide')  
            })
1.
2.
3.
4.
5.
6.
7.
8.