Question

我已阅读this answer which was very detailed but one had thing caught me eyes：

import { MyThingService } from '../my-thing.service';

@Component({
    selector: 'my-thing',
    templateUrl: './my-thing.component.html'
})
export class MyThingComponent implements OnDestroy, OnInit {
    private ngUnsubscribe: Subject = new Subject();

    constructor(
        private myThingService: MyThingService,
    ) { }

    ngOnInit() {
        this.myThingService.getThings()
            .takeUntil(this.ngUnsubscribe)
            .subscribe(things => console.log(things));

        /* if using lettable operators in rxjs ^5.5.0
        this.myThingService.getThings()
            .pipe(takeUntil(this.ngUnsubscribe))
            .subscribe(things => console.log(things));
        */

        this.myThingService.getOtherThings()
            .takeUntil(this.ngUnsubscribe)
            .subscribe(things => console.log(things));

    }

    ngOnDestroy() {
        this.ngUnsubscribe.next();
        this.ngUnsubscribe.complete();
    }
}

创建主题以处理要完成的所有信号。但是在ngOnDestroy中查看主题本身：为什么他们也完成了这个主题？垃圾收集时不会被收集吗？我可以同意这样的想法，即完成它是正确的，但是没有必要，因为gc将查看组件并看到该主题未被使用而不引用任何其他对象

问题

我在这里遗漏了什么吗？我们还必须打电话给完成吗？

完成私人主题是否有必要？

0 个答案: