Question

我想知道是否有可能用计时器打破一个while循环？在互联网上查找但无法找到解决方案。

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RETURN collect(nodes(paths))

谢谢。

Answer 1

您应该使用setTimeout。

var timer = 3;
setTimeout(excuteMethod, 1000);

function excuteMethod() {
  alert(timer + ' call');
  timer--;
  if (timer >= 0) setTimeout(excuteMethod, 1000);
}

演示：http://jsfiddle.net/kishoresahas/9s9z7adt/

Answer 2

我不确定这是否是正确的方法，但它确实有效，

(function() {
  var delay = 30;
  var date = new Date();
  var timer = date.setTime(date.getTime() + delay);
  var count = 0;

  function validate() {
    var now = new Date();
    if (+now > timer)
      return false;
    else
      return true;
  }

  while (true) {
    count++;
    console.log(count);
    if (!validate()) {
      console.log("Time expired");
      break;
    }

    // Fail safe.
    if (count > 50000) {
      console.log("Count breached")
      break;
    }
  }
})()

Answer 3

您可以更改计时器功能中的控制值并打破循环。

var control = true;
while(control)
{
    ...
}

setTimeout(function(){
    control = false;
}, delay); //delay is miliseconds

或基于计数器

var control = true,
    counter = 10;

while(control){
    ...
}

// you can handle as count down
// count down counter every 1000 miliseconds
// after 10(counter start value) seconds
// change control value to false to break while loop
// and clear interval
var counterInterval = setInterval(function(){
    counter--;
    if(counter == 0)
    {
        control = false;
        clearInterval(counterInterval);
    }
},1000);

用计时器打断循环？

3 个答案: