Question

我是Javascript的新手，我从网上获得了这个Javascript计时器。我正在尝试停止计时器并将停止的时间插入到数据库中，如果设置了某个PHP变量，但我不知道如何停止计时器。这是代码。我看到这篇文章，遗憾的是，我仍然无法让它发挥作用。 How to stop a timer function from running? 谢谢！

<script type="text/javascript">
/**********************************************************************************************
* CountUp script by Praveen Lobo (http://PraveenLobo.com/techblog/javascript-countup-timer/)
* This notice MUST stay intact(in both JS file and SCRIPT tag) for legal use.
* http://praveenlobo.com/blog/disclaimer/
**********************************************************************************************/
function CountUp(initDate, id){
    this.beginDate = new Date(initDate);
    this.countainer = document.getElementById(id);
    this.numOfDays = [ 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 ];
    this.borrowed = 0, this.years = 0, this.months = 0, this.days = 0;
    this.hours = 0, this.minutes = 0, this.seconds = 0;
    this.updateNumOfDays();
    this.updateCounter();
}



CountUp.prototype.updateNumOfDays=function(){
    var dateNow = new Date();
    var currYear = dateNow.getFullYear();
    if ( (currYear % 4 == 0 && currYear % 100 != 0 ) || currYear % 400 == 0 ) {
        this.numOfDays[1] = 29;
    }
    var self = this;
    setTimeout(function(){self.updateNumOfDays();}, (new Date((currYear+1), 1, 2) - dateNow));
}

CountUp.prototype.datePartDiff=function(then, now, MAX){
    var diff = now - then - this.borrowed;
    this.borrowed = 0;
    if ( diff > -1 ) return diff;
    this.borrowed = 1;
    return (MAX + diff);
}

CountUp.prototype.calculate=function(){
    var currDate = new Date();
    var prevDate = this.beginDate;
    this.seconds = this.datePartDiff(prevDate.getSeconds(), currDate.getSeconds(), 60);
    this.minutes = this.datePartDiff(prevDate.getMinutes(), currDate.getMinutes(), 60);
    this.hours = this.datePartDiff(prevDate.getHours(), currDate.getHours(), 24);
    this.days = this.datePartDiff(prevDate.getDate(), currDate.getDate(), this.numOfDays[currDate.getMonth()]);
    this.months = this.datePartDiff(prevDate.getMonth(), currDate.getMonth(), 12);
    this.years = this.datePartDiff(prevDate.getFullYear(), currDate.getFullYear(),0);
}

CountUp.prototype.addLeadingZero=function(value){
    return value < 10 ? ("0" + value) : value;
}

CountUp.prototype.formatTime=function(){
    this.seconds = this.addLeadingZero(this.seconds);
    this.minutes = this.addLeadingZero(this.minutes);
    this.hours = this.addLeadingZero(this.hours);
}

CountUp.prototype.updateCounter=function(){
    this.calculate();
    this.formatTime();
    this.countainer.innerHTML =
        " <strong>" + this.hours + "</strong> <small>" + (this.hours == 1? ":" : ":") + "</small>" +
        " <strong>" + this.minutes + "</strong> <small>" + (this.minutes == 1? ":" : ":") + "</small>" +
        " <strong>" + this.seconds + "</strong> <small>" + "</small>";
    var self = this;
    setTimeout(function(){self.updateCounter();}, 1000);
}
<?php if(isset($results['calltime'])) {$timevar= date("M d, Y H:i:s",strtotime($results['calltime']));}?> 
window.onload=function(){ new CountUp('<?php echo $timevar; ?>', 'counter'); }

//I need a function to stop timer if (isset($results['firstcall_time']))


</script>

Answer 1

在您的方法中 updateCounter（）您有以下语句

setTimeout(function(){self.updateCounter();}, 1000);

让它像第一个一样。

myTimer = setTimeout(function(){self.updateCounter();}, 1000);

然后每当你想停止定时器调用这个方法时。

clearTimeout(myTimer);

然后记录时间。它使用setTimeout进行计数，因此您必须使用clearTimeout来停止收缩。

reffer Clear Timeout

干杯

Answer 2

在行中：

setTimeout(function(){self.updateNumOfDays();}, (new Date((currYear+1), 1, 2) - dateNow));

并且

setTimeout(function(){self.updateCounter();}, 1000);

您可以看到正在使用递归，因此计时器继续运行。

所以当你想要停止计时器时，请按照以下方式进行搜索：

 var flag = true;
<?php if (isset($results['firstcall_time'])){ ?>
  flag = false;
<?php } ?>

将脚本修改为：

 setTimeout(function(){if(flag){self.updateNumOfDays();}else{//write code to cleartimeout}}, (new Date((currYear+1), 1, 2) - dateNow));//check for the flag before recursion

和

setTimeout(function(){if(flag){self.updateCounter();}}else{//write code to cleartimeout}, 1000);

Answer 3

他没有使用计时器。他正在使用setTimeout，但执行函数是相同的方法，类似于递归（但严格来说，它不是）。所以，它正在进行中。希望这是有道理的。

计时器的实现方式如下：

// Start
var timerId = setInterval(func() {
    // your code to execute
}, 5000);

// Stop
clearInterval(timerId);

我在CountUp中添加了一个停止方法。所以你现在应该能够做到这一点：

// Start
var counter = new CountUp(new Date(), 'div');

// Stop
counter.stop();

这是代码。我只是在这里手写，所以如果有任何错别字或某些东西不起作用，那么发表评论。

function CountUp(initDate, id){
    this.beginDate = new Date(initDate);
    this.countainer = document.getElementById(id);
    this.numOfDays = [ 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 ];
    this.borrowed = 0, this.years = 0, this.months = 0, this.days = 0;
    this.hours = 0, this.minutes = 0, this.seconds = 0;

    this.daysTimerId = setInterval(this.updateNumOfDays(), this.getDaysTimerInterval());
    this.updateTimerId = setInterval(this.updateCounter(), 1000);
}

CountUp.prototype.stop=function(){
    clearInterval(this.daysTimerId);
    clearInterval(this.updateTimerId);
}

CountUp.prototype.getDaysTimerInterval=function(dt){
    var dateNow = dt || new Date();
    return (new Date((dateNow.getFullYear()+1), 1, 2) - dateNow));
}

CountUp.prototype.updateNumOfDays=function(){
    var dateNow = new Date();
    var currYear = dateNow.getFullYear();
    if ( (currYear % 4 == 0 && currYear % 100 != 0 ) || currYear % 400 == 0 ) {
        this.numOfDays[1] = 29;
    }
//    var self = this;
//    setTimeout(function(){self.updateNumOfDays();}, self.getDaysTimerInterval(dateNow));
}

CountUp.prototype.datePartDiff=function(then, now, MAX){
    var diff = now - then - this.borrowed;
    this.borrowed = 0;
    if ( diff > -1 ) return diff;
    this.borrowed = 1;
    return (MAX + diff);
}

CountUp.prototype.calculate=function(){
    var currDate = new Date();
    var prevDate = this.beginDate;
    this.seconds = this.datePartDiff(prevDate.getSeconds(), currDate.getSeconds(), 60);
    this.minutes = this.datePartDiff(prevDate.getMinutes(), currDate.getMinutes(), 60);
    this.hours = this.datePartDiff(prevDate.getHours(), currDate.getHours(), 24);
    this.days = this.datePartDiff(prevDate.getDate(), currDate.getDate(), this.numOfDays[currDate.getMonth()]);
    this.months = this.datePartDiff(prevDate.getMonth(), currDate.getMonth(), 12);
    this.years = this.datePartDiff(prevDate.getFullYear(), currDate.getFullYear(),0);
}

CountUp.prototype.addLeadingZero=function(value){
    return value < 10 ? ("0" + value) : value;
}

CountUp.prototype.formatTime=function(){
    this.seconds = this.addLeadingZero(this.seconds);
    this.minutes = this.addLeadingZero(this.minutes);
    this.hours = this.addLeadingZero(this.hours);
}

CountUp.prototype.updateCounter=function(){
    this.calculate();
    this.formatTime();
    this.countainer.innerHTML =
        " <strong>" + this.hours + "</strong> <small>" + (this.hours == 1? ":" : ":") + "</small>" +
        " <strong>" + this.minutes + "</strong> <small>" + (this.minutes == 1? ":" : ":") + "</small>" +
        " <strong>" + this.seconds + "</strong> <small>" + "</small>";
//    var self = this;
//    setTimeout(function(){self.updateCounter();}, 1000);
}

Answer 4

以下是我停止计数器的方法：

我在“CountUp.prototype.updateCounter = function（）{”

之前插入了这几行

var today=new Date(); 
var start=new Date(2013,10,25,5,35,0); //example: Stop date
diff =  start-today;

然后，在updateCounter函数内部，而不是直接调用setTimeout我添加了一个条件：

 if ( ( (this.seconds==0) && (this.minutes==0) (this.hours==0) && (this.days==0) ) || (diff <=0) )  { //on the fly (page is laready open with the counter running) or onload 
    //Time's up!
    } else {
        setTimeout(function(){self.updateCounter();}, 1000);
    }

所以新代码看起来像这样：

var today=new Date(); 
var start=new Date(2013,10,25,5,35,0); 
diff =  start-today; 

Counter.prototype.updateCounter=function(){
this.calculate();
this.formatTime();
this.countainer.innerHTML = " <strong>" + this.seconds + "</strong> " + (this.seconds == 1? ":" : ":")+
    " <strong>" + this.minutes + "</strong> " + (this.minutes == 1? ":" : ":")+
    " <strong>" + this.hours + "</strong> " + (this.hours == 1? ":" : ":")+
    " <strong>" + this.days + "</strong> " + (this.days == 1? ":" : "");
var self = this;
if ( ( (this.seconds==0) && (this.minutes==0) (this.hours==0) && (this.days==0) ) || (diff <=0) )  { //on the fly or onload 
//Time's up!
} else {
setTimeout(function(){self.updateCounter();}, 1000);
}
}

希望这会有所帮助。

姆斯

停止此Javascript计时器的功能

4 个答案: