Question

我认为问题很明确。我找不到有关如何退订rsjx之类的interval or timer操作的信息吗？

我的组件：

public intervallTimer = interval(5000);

ngOnInit() {
  this.getValues();
  this.intervallTimer.subscribe(() => this.getValues());
}

// What I like to do is something like this, but "unsubscribe()" that's no function
somefunction(){
  this.intervallTimer.unsubscribe()
}

Answer 1

或者您可以使用takeWhile(Boolean)来控制行为

this.intervallTimer.pipe(
      takeWhile(// your condition)
).subscribe(() => this.getValues());

您可以从here

中找到文档

Answer 2

subscribe返回一个以Subscription作为方法的unsubscribe对象。您可以选择的一种方法是：

public intervallTimer = interval(5000);
private subscription;

ngOnInit() {
  this.getValues();
  this.subscription = this.intervallTimer.subscribe(() => this.getValues());
}

somefunction(){
  this.subscription.unsubscribe()
}

这要求您明确取消订阅，而您可能不想这样做。您也可以考虑使用takeUntil，它返回complete Observable，这将导致自动unsubscribe。只需确保takeUntil是the last in any chain。

public intervallTimer = interval(5000);
private alive = true;

ngOnInit() {
  this.getValues();
  this.intervallTimer.pipe(takeUntil(() => !this.alive)).subscribe(() => this.getValues());
}

somefunction(){
  this.alive = false;
}

角度6：如何退订rsjx间隔或计时器？

2 个答案: