如何转换ngx-material-timepicker的默认值

Question

我想使用html中的ngx-material-timepicker更新时间。因此，当我选择时间时，格式为上午03:20，我希望在上午03:20

我将数据转换为12小时格式，但无法正常工作

TS代码

convert24To12HourFormat(time): string {
    let timeArray = time.split(":");
    let timeIn12HourFormat = "";
    if (parseInt(timeArray[0]) <= 12) {
      timeIn12HourFormat += time + " AM";
    }
    else {
      var newhh = (timeArray[0] - 12) + "";
      if (parseInt(newhh) < 10) {
        newhh = "0" + newhh;
      }
      timeIn12HourFormat = newhh + ":" + timeArray[1];
      timeIn12HourFormat += " PM";
    }
    return timeIn12HourFormat;
  }

HTML代码

    <div *ngIf="editable == true">
        <input [ngxTimepicker]="starttime" class="form-control" [(ngModel)]="eventStartTime" name="eventStartTime"  placeholder={{eventStartTime}} (ngModelChange)="fieldsChanged();">
        <ngx-material-timepicker #starttime ></ngx-material-timepicker>
    </div>
    <b *ngIf="editable == false">{{eventStartTime}}</b>
</div>

预期输出03:20 AM 实际输出03:20 am