使用Angular中的RxJs，我只需要完成在组件中创建的Observable吗？

基本上我还不太清楚Angular组件中反应代码的清理 . 以下规则是否正确且充分？

我对无功组件的规则：

• on manual x.subscribe（）：

• 如果使用x.takeUntil（...）或类似的构造，则无需手动清理

• 如果在组件范围内调用x.complete（），则无需手动清理

• else手动.unsubscribe（）按需或在ngOnDestroy（）

• 关于模板的可观察性|异步：

• 无需手动清理加上onPush兼容

• 关于手动直接创建Observable，如新的Subject（）：
  在ngOnDestroy（）中

• manual .complete（）从不关闭

• 使用Observable.merge（...）等其他Observable进行手动创建：

• 只要清理订阅，就不需要手动清理

我不确定最后一个要点 .

以下是根据这些规则重构的实际组件的完整示例，有人可以看到是否存在内存泄漏的危险吗？所有公共$ observable都通过模板中的异步管道进行订阅，因此我确信订阅已得到处理 . 用new创建的主题是手动清理的，所以应该没问题 . 我担心的部分是Observable.combineLatest（...）observables .

import { ChangeDetectionStrategy, Component, Input, OnDestroy } from '@angular/core';
import { Router } from '@angular/router';
import { DeliveryPointId } from 'app/bso';
import { BookmarkService } from 'app/general';
import { EAccess, EPermission, ReduxGetters, ReduxService } from 'app/redux';
import * as routing from 'app/routing';
import { BehaviorSubject, Observable } from 'app/rx';

@Component({
  selector: 'app-last-opened-workitems-widget',
  templateUrl: './last-opened-workitems-widget.component.html',
  changeDetection: ChangeDetectionStrategy.OnPush,
})
export class LastOpenedWorkitemsWidgetComponent implements OnDestroy {

  private readonly showPartners$ = new BehaviorSubject(true);
  private readonly showServices$ = new BehaviorSubject(true);
  private readonly showTens$ = new BehaviorSubject(true);
  private readonly showWorklist$ = new BehaviorSubject(true);

  @Input() set showItems(val: boolean) { this.showWorklist$.next(!!val); }
  @Input() set showPartners(val: boolean) { this.showPartners$.next(!!val); }
  @Input() set showProcesses(val: boolean) { this.showServices$.next(!!val); }
  @Input() set showTens(val: boolean) { this.showTens$.next(!!val); }

  constructor(
    private readonly redux: ReduxService,
    private readonly bookmarks: BookmarkService,
    private readonly router: Router,
  ) { }

  canPartners$ = this.redux.watch(ReduxGetters.userAccess).map(access => access[EPermission.Partner] >= EAccess.Read);
  canServices$ = this.redux.watch(ReduxGetters.userAccess).map(access => access[EPermission.Services] >= EAccess.Read);
  canTens$ = this.redux.watch(ReduxGetters.userAccess).map(access => access[EPermission.Tens] >= EAccess.Read);
  canWorklist$ = this.redux.watch(ReduxGetters.userAccess).map(access => access[EPermission.Worklist] >= EAccess.Read);

  lastItems$ = this.bookmarks.onLastOpenedWorkitems.map(ii => [...ii].reverse());
  lastPartners$ = this.bookmarks.onLastOpenedPartners.map(ii => [...ii].reverse());
  lastProcesses$ = this.bookmarks.onLastOpenedProcesses.map(ii => [...ii].reverse());
  lastTens$ = this.bookmarks.onLastOpenedTens.map(ii => [...ii].reverse());

  hasContentPartners$ = Observable
    .combineLatest(
      this.showPartners$.distinctUntilChanged(),
      this.canPartners$,
      this.lastPartners$.map(ii => ii.length > 0))
    .map(oks => oks.every(ii => ii));

  hasContentServices$ = Observable
    .combineLatest(
      this.showServices$.distinctUntilChanged(),
      this.canServices$,
      this.lastProcesses$.map(ii => ii.length > 0))
    .map(oks => oks.every(ii => ii));

  hasContentTens$ = Observable
    .combineLatest(
      this.showTens$.distinctUntilChanged(),
      this.canTens$,
      this.lastTens$.map(ii => ii.length > 0))
    .map(oks => oks.every(ii => ii));

  hasContentWorklist$ = Observable
    .combineLatest(
      this.showWorklist$.distinctUntilChanged(),
      this.canWorklist$,
      this.lastItems$.map(ii => ii.length > 0))
    .map(oks => oks.every(ii => ii));

  hasContent$ = Observable
    .combineLatest(this.hasContentPartners$, this.hasContentServices$, this.hasContentTens$, this.hasContentWorklist$)
    .map(oks => oks.some(ii => ii));

  ngOnDestroy() {
    [this.showPartners$, this.showServices$, this.showTens$, this.showWorklist$].forEach(ii => ii.complete());
  }

  gotoPartner = (id: string) => routing.gotoPartnerItem(this.router, id);
  gotoProcess = (id: number) => routing.gotoProcess(this.router, id);
  gotoTensItem = (id: DeliveryPointId) => routing.gotoTensItem(this.router, id);
  gotoWorkitem = (id: number) => routing.gotoWorkitem(this.router, id);

}