Observable的值不会传递给指令，即使它在插值中有效

Question

我正在使用ng-fullcalendar并且出于某种原因，我的代码仅在init上扫描extension NSImage { func resizedTo(width: CGFloat, height: CGFloat) -> NSImage { let ratio = min(canvas.width/size.width, canvas.height/size.height) let canvasSize = NSSize(width: size.width * ratio, height: size.height * ratio) let img = NSImage(size: canvasSize) img.lockFocus() NSGraphicsContext.current?.imageInterpolation = .high draw(in: NSRect(origin: CGPoint(x: (canvasSize.width - (size.width * ratio)) / 2, y: (canvasSize.height - (size.height * ratio)) / 2), size: canvasSize), from: NSRect(origin: .zero, size: size), operation: .copy, fraction: 1) img.unlockFocus() return img } } 的值（因此我只得到初始值，而不是值的任何更新），即使检查使用[options]似乎工作正常。这可能是什么原因？

// component.ts

{{ calendarOptions.events | json }}

// component.html

@Component({
    // [...]
    changeDetection: ChangeDetectionStrategy.OnPush
})

ngOnInit() {
    this.fooCollection = this.afs
        .collection('collectionFoo')
        .doc('doc')
        .collection('collectionBar')
        .snapshotChanges()
        .map(activities => {
            return activities.map(a => {
                const data = a.payload.doc.data();
                const id = a.payload.doc.id;
                return { id, ...data };
            });
        });

    this.fooCollection.subscribe(response => {
        this.calendarOptions = {
            editable: true,
            aspectRatio: 1.618,
            eventLimit: true,
            header: {
                left: 'prev,next today',
                center: 'title',
                right: 'month,agendaWeek,agendaDay,listMonth'
            },
            timeFormat: 'HH:mm',
            locale: 'it',
            timezone: 'local',
            events: response
        };
        this.cd.markForCheck();
    });
}