@Entry@Componentstruct QuickTestMainPage {  @State paperAllTime: number = 0; // 做试卷模式下的总时长  @State remainTimeUi: string = "00:00";  @State remainTime: number = 0; // ui显示的时长，做试卷为倒计时，普通做题为正记时      build() {     Column() {            CustomIcon({              iconType: CustomIconType.icon_timer,              iconSize: 19,              iconColor: StyleRes.getStyleColor(StyleColor.textBoldColor, this.lightMode)            })            Text(this.remainTimeUi)              .fontColor(StyleRes.getStyleColor(StyleColor.texSubColor, this.lightMode))              .fontSize(11)          }  }
}

@Entry@Componentstruct QuickTestMainPage {  @State paperAllTime: number = 0; // 做试卷模式下的总时长  @State remainTimeUi: string = "00:00";  @State remainTime: number = 0; // ui显示的时长，做试卷为倒计时，普通做题为正记时    aboutToAppear(): void {       this.timerInit()  }      timerInit() {    if (this.isTest) {      this.remainTime = this.paperAllTime - this.makeTime;    } else {      this.remainTime = this.makeTime;    }    this.remainTimeUi = Utils.formatSeconds(this.remainTime);
    this.secondReturn();  }
  secondReturn() {    this.doExamTimer = setTimeout(() => {      if (this.isTest) {        // 做试卷
        this.remainTime--;        this.remainTimeUi = Utils.formatSeconds(this.remainTime);        this.makeTime = this.paperAllTime - this.remainTime;
        if (this.remainTime <= 0) {          return;        }      } else {        this.remainTime++;        this.remainTimeUi = Utils.formatSeconds(this.remainTime);        this.makeTime = this.remainTime;      }
      // LogUtil.info(`doExamTimer: ${this.remainTime}`)
      this.secondReturn();
    }, 1000)
  }