TextInput先是隐藏状态。获取到数据设置text并显示，无法弹出软键盘，如何在显示TextInput时同时显示软键盘

@Entry  
@Component  
struct SearchPage {  
  aboutToAppear(): void {  
    setTimeout(() => {  
      focusControl.requestFocus('AAA')  
    }, 1000)  
  }  
  build() {  
    Row() {  
      Column() {  
        TextInput().enableKeyboardOnFocus(true).key('AAA')  
      }  
      .width('100%')  
    }  
    .height('100%')  
  }  
}