Angular 6-如何在订阅()中停止无限轮询

import { Observable, Subscription } from 'rxjs';

dataObservable: Observable<any>;
subscription: Subscription;

ngOnInit() {
  this.dataObservable = this.getData(); // 替换为获取数据的方法
  this.startPolling();
}

startPolling() {
  this.subscription = this.dataObservable.subscribe(
    (data) => {
      // 处理获取到的数据
      // 如果需要停止无限轮询的条件满足，调用stopPolling()方法
      if (condition) {
        this.stopPolling();
      }
    },
    (error) => {
      // 处理错误
    }
  );
}

stopPolling() {
  if (this.subscription) {
    this.subscription.unsubscribe();
  }
}