为什么 'setInterval()' 呼叫没有停止？

Question

我已经查看了有关此主题的其他 SO 问题并尝试了解决方案。我找不到错误。所以我想，这一定是一个明显的错误。任何帮助将不胜感激。

var interval = 0; 

function repeat(time, bool) {
    var interval = setInterval(choose, time * 1000);

    function stopRepeat () {

        console.log("im trying to stop");
        clearInterval(interval);
    }

    if (bool) {
        stopRepeat();
    }
}

正在记录 "im trying to stop"。所以这意味着 clearInterval() 是不起作用的。我也曾尝试将其命名为 window.interval，但这并没有什么不同。

我还记录了它应该清除后的时间间隔，它只是产生相同的时间间隔而不是清除的时间间隔。

谢谢！

Answer 1

所以我要先用注释分析你的代码。

/*
* First this declaration (var interval=0) is redundant as it is re-declared in the 
* repeat function
*/
var interval = 0; 

function repeat(time, bool) {
    var interval = setInterval(choose, time * 1000);

    function stopRepeat () {

        console.log("im trying to stop");
        clearInterval(interval);
    }
    /*
    * Lets assume bool is true.
    * StopRepeat is called immediately and your interval function never gets 
    * to execute nor does your choose function even gets called.

    * Now lets assume bool is even false.
    * StopRepeat never gets called and there is not way of clearing the interval
    */
    if (bool) {
        stopRepeat();
    }
}

有很多方法可以尝试，我会稍微修改一下。

var choose = function(){
  console.log("choose was called!");
}

function repeat(time, timesToRun=1) {
    var count = 0;
    var interval = setInterval(function(){
      choose();
      if(count===timesToRun/*Or a better condition to stop the interval*/){
        console.log("Clearing my intervals");
        clearInterval(interval);
      }
      count++;
    }, time * 1000);
}

repeat(5, 2);

为什么 'setInterval()' 呼叫没有停止？

Why doesn't the 'setInterval()' call stop?

javascript

clearinterval