HarmonyOS H5页面，点击输入框，软键盘显示后瞬间又自动隐藏

参考demo示例：

@Entry
@Component
struct KeyboadPage {
  controller: TextInputController = new TextInputController()
  @State inputValue: string = ""
  @State InputBGColor: string = '#90EE90'
  aboutToAppear(): void {
    setTimeout(()=> {
      focusControl.requestFocus('Text_ID')
    }, 1000)
  }
  build() {
    Column({ space: 10 }) {
      TextInput({
        controller: this.controller,
        text: this.inputValue
      })
        .id('Text_ID')
        .backgroundColor(this.InputBGColor)
        .margin(10)
        .border({ width: 1 })
        .height('48vp')
        .onChange((val) => {
          this.inputValue = val
        })
        .onFocus(() => {
          this.InputBGColor = '#FF0000'
        })
        .onBlur(() => {
          this.InputBGColor = '#90EE90'
        })
      Button('组件失焦')
        .onClick(() => {
        setTimeout(() => {
          focusControl.requestFocus('333')
        }, 0)
      }).id('333')
      Button('组件获焦/切换')
        .onClick(() => {
        setTimeout(() => {
          focusControl.requestFocus('Text_ID')
        }, 200)
        focusControl.requestFocus('333')
      })
    }
  }
}
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