HarmonyOS 自定义弹窗CustomDialog

用自定义弹窗会出现用户强制退出会直接返回当前页面，想做的是用户无法强制返回，只能等弹窗消失。

//环境检测
@CustomDialog
export struct BSLoadingDialog {
  controller: CustomDialogController

  build() {
    Flex({ direction: FlexDirection.Row, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
      LoadingProgress().width(30).height(30).color('#ffffff')
      Text('环境检测中...').fontSize((14)).fontColor('#ffffff')
    }
    .width(150)
    .height(50)
    .padding(10)
    .backgroundColor('rgba(0,0,0,0.5)')
    .borderRadius(8)
  }
} //加载中弹窗
loadDialogController: CustomDialogController = new CustomDialogController({
  builder: BSLoadingDialog(),
  customStyle: true,
  alignment: DialogAlignment.Center,
  autoCancel: false,
})