HarmonyOS 鸿蒙Next：弹窗避让软键盘时，与软键盘之间16vp安全间距去除方法

开发者您好，可以参考以下示例：

import window from '[@ohos](/user/ohos).window'

[@Entry](/user/Entry)
[@Component](/user/Component)
export struct LightPublishMine {
  private window?: window.Window
  private onKeyboardHeightChange = (height: number) => {
    this.keyboardHeightVp = px2vp(height)
  }
  [@State](/user/State) private keyboardHeightVp: number = 0
  [@State](/user/State) private navHeight: number = 16
  [@State](/user/State) private safeAreaTop: number = 0

  aboutToAppear() {
    window.getLastWindow(getContext(this)).then((win) => {
      this.window = win;
      if (this.window) {
        this.window.on('keyboardHeightChange', this.onKeyboardHeightChange)
        this.keyboardHeightVp = px2vp(this.window.getWindowAvoidArea(window.AvoidAreaType.TYPE_KEYBOARD)
          .bottomRect
          .height)
        this.navHeight = px2vp(this.window.getWindowAvoidArea(window.AvoidAreaType.TYPE_NAVIGATION_INDICATOR)
          .bottomRect
          .height)
        this.safeAreaTop = px2vp(this.window.getWindowAvoidArea(window.AvoidAreaType.TYPE_SYSTEM).topRect.height)
      }
    })
  }

  aboutToDisappear() {
    if (this.window) {
      this.window.off('keyboardHeightChange', this.onKeyboardHeightChange)
      this.window = undefined
    }
    this.keyboardHeightVp = 0
  }

  build() {
    Row() {
      Column() {
        TextInput({ placeholder: '请输入' })
        Blank().backgroundColor(Color.Red).height(this.keyboardHeightVp - this.navHeight).width('100%')
      }.width('100%')
    }
    .height('100%')
    .backgroundColor(Color.Green)
    .alignItems(VerticalAlign.Bottom)
    .expandSafeArea([SafeAreaType.KEYBOARD], [SafeAreaEdge.BOTTOM])
  }
}