在使用forkJoin管道化shareReplay(1)之后，应该在组件的ngOnDestroy生命周期钩子中取消订阅。以下是示例代码：

import { Component, OnDestroy } from '@angular/core';
import { Observable, forkJoin } from 'rxjs';
import { shareReplay } from 'rxjs/operators';

@Component({
  selector: 'example-component',
  template: ``
})
export class ExampleComponent implements OnDestroy {
  private data$: Observable;

  constructor() {
    const request1 = this.http.get('api/data1');
    const request2 = this.http.get('api/data2');
    this.data$ = forkJoin(request1, request2).pipe(
      shareReplay(1)
    );
  }

  ngOnDestroy() {
    this.data$.unsubscribe();
  }
}