HarmonyOS 调用router.pushNamedRoute后跳转下个页面后，当前页面 CustomDialogController会隐藏

可以使用onWillDismiss来实现，请参考：https://developer.huawei.com/consumer/cn/doc/harmonyos-references-V5/js-apis-promptaction-V5

示例参考：

import { router } from '@kit.ArkUI'

@Entry
@Component
struct Index60 {
  dialogController: CustomDialogController | null = new CustomDialogController({
    builder: PrivacyDialog(),
    onWillDismiss: (dismissDialogAction: DismissDialogAction) => {
      console.info("reason=" + JSON.stringify(dismissDialogAction.reason))
      console.log("dialog onWillDismiss")
      if (dismissDialogAction.reason == DismissReason.PRESS_BACK) {
        router.back()
        //自定义侧滑返回事件
      }
      if (dismissDialogAction.reason == DismissReason.TOUCH_OUTSIDE) {
        dismissDialogAction.dismiss()
      }
    }
  })

  build() {

    Column() {
      Button('dialog')
        .onClick(() => {
          if (this.dialogController != null) {
            // 打开弹窗
            this.dialogController.open()
            // 记录当前弹窗

          }
        })
    }

  }
}

@CustomDialog
struct PrivacyDialog {
  controller?: CustomDialogController

  build() {
    Column() {
      Button('跳转').onClick(() => {
        router.pushUrl(
          {
            url: "pages/navigation/PageTwo"
          }
        )
      })

      Button('返回').onClick(() => {
        router.back()
      })

    }

  }
}
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