我试图通过使用锚标签来使用多个秒表计时器。我已成功完成但我无法添加功能,如果我点击第一个计时器,它将从零启动计时器,当我点击第二个,第一个计时器的值将为零,第二个计时器将从零开始计时器。我将在下面给出我的工作代码:
JS:
var digit=0;
var hrs = 0;
var min=0;
var time;
var timer_is_on=0;
var id;
function timer(id){
//[Old] - this should be placed after you increment digit
// document.getElementById("secs").innerHTML = digit
//alert("I am testing value"+id);
//[New]
// get the numerical value for seconds,minutes,hours
digit = parseInt(document.getElementById("secs"+id).innerHTML);
min = parseInt(document.getElementById("mins"+id).innerHTML);
hrs = parseInt(document.getElementById("hrs"+id).innerHTML);
// increment;
digit=digit+1;
if(digit>"59"){
min = parseInt(min)+1;
// why is this code here
var count = min.toString().length;
digit=0;
}
// [old] checking if second is greater than 59 and incrementing hours
// if(digit>"59"){
// [new] check if minute is greater than 59
if(min > "59"){
hrs=parseInt(hrs)+1;
digit=0;
min=0; // minute should be reset as well
}
// set the values after all processing is done
document.getElementById("secs"+id).innerHTML = format(digit);
document.getElementById("mins"+id).innerHTML= format(min);
document.getElementById("hrs"+id).innerHTML=format(hrs);
}
function activate(id){
if(!timer_is_on){
timer_is_on=1;
// time = setTimeout("timer()",1000) will only call it once , use setInterval instead
time=setInterval("timer("+id+")",1000);
}
else {
timer_is_on=0;
clearInterval(time); // clear the timer when the user presses the button again and reset timer_is_on
}
return id;
}
// left pad zero if it is less than 9
function format(time){
if(time > 9)
return time;
else return "0"+time;
}
我使用的HTML代码是:
<a href="#" onclick="activate(1)">Click here to start the timer</a>
<span id="hrs1" >00</span>:<span id="mins1" >00</span>:<span id="secs1">00</span></strong>
<br/>
<a href="#" onclick="activate(2)">Click here to start the timer</a>
<span id="hrs2" >00</span>:<span id="mins2" >00</span>:<span id="secs2">00</span>
这是我工作的js小提琴演示:http://jsfiddle.net/EPtFW/1/
答案 0 :(得分:0)
当您使用相同的方法activate()启动第二个计时器时,如果计时器已经运行,它将使第一个计时器为零。
解决方案是“你必须为多个计时器维护多个独特的计时器ID”
例如,假设你有T1和T2计时器来开始时间;
var timerMap={};
timerMap[createUniqueId for T1] = setInterval();
timerMap[createUniqueId for T2] = setInterval();
to clear timers
clearInterval(timerMap[createUniqueId for T1]);
clearInterval(timerMap[createUniqueId for T2]);
在你的情况下,你必须有createUniqueId,并且添加到timerMap应该在activate()方法中。他们将独立工作。