fullCalendar（'refetchEvents'）在angular5中不起作用

Question

我在angular5订阅方法中使用fullCalendar。当我对数据进行一些更改时，它应该反映在日历上，但它不起作用。我正在尝试this.ucCalendar.fullCalendar('refetchEvents')，但是它不起作用，日历也没有刷新。我也尝试过this.ucCalendar.fullCalendar('destroy')，它破坏了日历，但是this.ucCalendar.fullCalendar('render')也无法正常工作。

this.calendarOptions = {
            editable: true,
            eventLimit: 3,
            displayEventTime: false,
            header: {
              left: 'prev,next',
              center: '',
              right: 'title'
            },
            events: calendarEvents
          };

          this.ucCalendar.fullCalendar('refetchEvents')

我收到此错误。

TypeError: Cannot read property 'fullCalendar' of undefined
    at SafeSubscriber.eval [as _next] (dashboard.component.ts:230)
    at SafeSubscriber.__tryOrUnsub (Subscriber.js:195)
    at SafeSubscriber.next (Subscriber.js:133)
    at Subscriber._next (Subscriber.js:77)
    at Subscriber.next (Subscriber.js:54)
    at MapSubscriber._next (map.js:41)
    at MapSubscriber.Subscriber.next (Subscriber.js:54)
    at eval (angularfire2.js:36)
    at ZoneDelegate.invoke (zone.js:388)
    at Object.onInvoke (core.js:4749)

  

“ fullcalendar”：“ ^ 3.6.1”，       “ ng-fullcalendar”：“ ^ 1.6.1”，