此问题可能是由于不正确的使用Observable或不正确的使用Async Pipe引起的。可以按照以下步骤进行解决：

1.确保在Angualr模块中正确引入了Observable

import { Observable } from 'rxjs/Observable';

2.在组件中声明Observable

import { Observable } from 'rxjs/Observable';

export class MyComponent implements OnInit { myObservableList$: Observable;

ngOnInit() { this.myObservableList$ = this.myService.getList(); } }

3.在组件模板中使用Async Pipe

• {{ item.name }}

注意：使用Async Pipe时不需要手动订阅列表。

以下是示例代码：

// my-service.service.ts import { Injectable } from '@angular/core'; import { Observable } from 'rxjs/Observable'; import { of } from 'rxjs/observable/of';

@Injectable() export class MyService {

getList(): Observable { const list: MyType[] = [ { name: 'John', age: 26 }, { name: 'Jane', age: 32 }, { name: 'Tom', age: 18 } ]; return of(list); }

}

// my-component.component.ts import { Component, OnInit } from '@angular/core'; import { Observable } from 'rxjs/Observable'; import { MyService } from './my-service.service';

@Component({ selector: 'app-my-component', templateUrl: './my-component.component.html', styleUrls: ['./my-component.component.css'] }) export class MyComponent implements OnInit { myObservableList$: Observable;

constructor(private myService: MyService) {}

ngOnInit() { this.myObservableList$ = this.myService.getList(); }

}

// my-component.component.html

• {{ item.name }} ({{ item.age }})

注意：需要在Angualr模块中引入MyService和MyComponent。