HarmonyOS TextInput自定义键盘问题

import prompt from '@ohos.prompt' 
import router from '@ohos.router'; 
// xxx.ets 
@Entry 
@Component 
struct TextInputExample { 
  controller: TextInputController = new TextInputController() 
  @State inputValue: string = "" 
 
    onPageShow(){ 
      setTimeout(() => { 
        let res=focusControl.requestFocus('BBB') 
        if (res) { 
          prompt.showToast({message: 'Request success'}) 
        } else { 
          prompt.showToast({message: 'Request failed'}) 
        } 
      }, 0) 
    } 
 
  // 自定义键盘组件 
  @Builder CustomKeyboardBuilder() { 
    Column() { 
      Button('x').onClick(() => { 
        // 关闭自定义键盘 
        this.controller.stopEditing() 
      }) 
      Grid() { 
        ForEach([1, 2, 3, 4, 5, 6, 7, 8, 9, '*', 0, '#'], (item:number|string) => { 
          GridItem() { 
            Button(item + "") 
              .width(110).onClick(() => { 
              this.inputValue += item 
            }) 
          } 
        }) 
      }.maxCount(3).columnsGap(10).rowsGap(10).padding(5) 
    }.backgroundColor(Color.Gray) 
  } 
 
  build() { 
    Column() { 
      Button('我会获取焦点') 
        .key('BBB') 
      TextInput({ controller: this.controller, text: this.inputValue }) 
        // 绑定自定义键盘 
        .customKeyboard(this.CustomKeyboardBuilder()).margin(10).border({ width: 1 }).height('48vp') 
      Button('点击焦点转移') 
        .onClick(()=>{ 
          let res=focusControl.requestFocus('BBB') 
          if (res) { 
            prompt.showToast({message: 'Request success'}) 
          } else { 
            prompt.showToast({message: 'Request failed'}) 
          } 
        }) 
      Button('点击跳转页面') 
        .onClick(() => { 
          router.pushUrl({ url: 'pages/Second' }) 
        }) 
    } 
  } 
}