Question

我正在使用下面的简单倒计时，除非将它放在循环中，否则它正常工作。在循环期间，前一个和新的计数器都保持工作。我想杀死前一个计数器并以新的开始，这是我无法实现的。请有人帮忙吗

function triggerEvery60Sec(){

    var myCounter = new Countdown({  
        seconds:5,  // number of seconds to count down
        onUpdateStatus: function(sec){console.log(sec);}, // callback for each second
        onCounterEnd: function(){ alert('counter ended!');} // final action
    });

    myCounter.start();
}


function Countdown(options) {
    var timer,
    instance = this,
    seconds = options.seconds || 10,
    updateStatus = options.onUpdateStatus || function () {},
    counterEnd = options.onCounterEnd || function () {};

    function decrementCounter() {
        updateStatus(seconds);
        if (seconds === 0) {
            counterEnd();
            instance.stop();
        }
        seconds--;
    }

    this.start = function () {
        clearInterval(timer);
        timer = 0;
        seconds = options.seconds;
        timer = setInterval(decrementCounter, 1000);
    };

    this.stop = function () {
        clearInterval(timer);
    };
}

Answer 1

不是在循环中声明你的变量，也许你应该在之前声明它，并在你的循环中操纵它。

var myCounter = null;

function triggerEvery60Sec(){

    myCounter = new Countdown({  
    seconds:5,  // number of seconds to count down
    onUpdateStatus: function(sec){console.log(sec);}, // callback for each second
    onCounterEnd: function(){ alert('counter ended!');} // final action
});

myCounter.start();
}

倒计时被置于循环中时无法杀死前一个计数器

1 个答案: