Question

在以下代码段中，我希望timeDiff可以在waitTime上设置。但我知道内部函数中的timeDiff只有在执行时才会获得值。如何使用元素的TIMEDIFF来设置给定函数的超时？

  var timeDiff;
  for (var i = 0; i < q.length; i++) {
      (function() {

          timeouts.push($timeout(function() {
              var element = q.shift(); // q is a queue
              timeDiff = element.TIMEDIFF;
              console.log(element.TIMEDIFF); //3000 
              broadcastData(element);
          }, waitingTime));

          // console.log(timeDiff + " timeiff");

          waitingTime = waitingTime + timeDiff; // 1000 + 3000
      })();
  }

简单来说，waitingTime应该依赖于element.TIMEDIFF。如何实现？

Answer 1

这样的事情怎么样？我已经把它变得有点泛，但它应该做你希望实现的目标。 Example在这里。下一个函数的时间可以从当前正在执行的函数中完全配置。

  var waitingTime = 100;
  var q = {length: 100};
  var i = 0;
  var timeouts = [$timeout(getTimeDiff, waitingTime).then(callback)];

  function callback(newTime) {
    while(i < q.length) {
      i++;
      var promise = $timeout(getTimeDiff, newTime).then(callback);
      timeouts.push(promise);
      return promise;
    }
  }

  function getTimeDiff() {
      //here is where you would access the q and get the timediff
      waitingTime += Math.floor(Math.random() * 100);
      console.log(waitingTime + " until next tick");
      return waitingTime;
  }

Answer 2

我已经改变了一点，我希望这适合你。

var timeDiff;
for (var i = 0; i < q.length; i++) {
    var element = q[i];
    timeDiff = element.TIMEDIFF;

    timeouts.push(setTimeout(function(data) {
        broadcastData(data.e);
    }, waitingTime, {e:element}));

    waitingTime = waitingTime + timeDiff;
}

访问超时函数

2 个答案: