js实现类似iphone的秒表，添加平均数功能
<!DOCTYPE html><html> <head> <meta charset="utf-8"> <meta name="viewport" content="initial-scale=1, maximum-scale=1, user-scalable=no, width=device-width"> <title>stop watch</title> <!--by 0o晓月メ http://www.cnblogs.com/final-elysion/p/6066358.html --> <script type="text/javascript"> //起始计时时间 var totalStartTime = null; var countStartTime = null; //暂停时的时间 var stopCountTime = 0; var stopTotalTime = 0; //保存的计次时间列表 var countList = []; //循环指针 var changeTime = null; var addnewValue = false; var begin = false; //label & 缓存已经使用的时间 var countTime = null; var totalTime = null; beginChange = function(){ //设置标志位进行控制,避免多线程造成的变量问题 begin = true; changeTime = setInterval(changeStopWatch,10); document.getElementById('begin').disabled = true; document.getElementById('stop').disabled = false; document.getElementById('commit').disabled = false; document.getElementById('reset').disabled = true; } /** * 计时器核心方法 */ changeStopWatch = function(){ if(begin){ totalStartTime = new Date(); countStartTime = totalStartTime; begin = false; }else if(addnewValue){ //重设新的起始时间 暂停的时间点 countStartTime = new Date(); stopCountTime = 0; addnewValue = false; } var now = new Date(); var tempTotal = (now.getTime() - totalStartTime.getTime())/1000 + stopTotalTime; var tempCount = (now.getTime() - countStartTime.getTime())/1000 + stopCountTime; tempTotal = Math.floor(tempTotal * 100) / 100; tempCount = Math.floor(tempCount * 100) / 100; //多线程问题有时候会出现这情况 if(tempTotal < 0 || tempCount < 0){ console.log('bug') return ; } setTotalTime(tempTotal); setCountTime(tempCount); } stopChange = function(){ clearInterval(changeTime); stopCountTime = countTime; stopTotalTime = totalTime; document.getElementById('begin').disabled = false; document.getElementById('stop').disabled = true; document.getElementById('commit').disabled = true; document.getElementById('reset').disabled = false; } addNewValue = function (){ //缓存添加的时间 var newValue = countTime; countList.push(newValue); //设置标志位进行控制,避免多线程造成的变量问题 addnewValue = true; //刷新页面 setNewValue(newValue); changeAverage(); } changeAverage = function(){ var total = 0, i = 0; for(;i<countList.length; i++){ total = total +countList[i]; } var result = Math.floor(total/i * 100) / 100; document.getElementById('average').innerText = secondToTime(result); document.getElementById('average-second').innerText = result; } resetStopWatch = function(){ totalStartTime = 0; countStartTime = 0; stopCountTime = 0; stopTotalTime = 0; countList = []; changeTime = null; addnewValue = false; begin = false; setCountTime(0); setTotalTime(0); document.getElementById('result').innerHTML = ""; document.getElementById('average').innerText = "00:00:00.00"; document.getElementById('result-second').innerHTML = ""; document.getElementById('average-second').innerText = "0"; } function secondToTime(time) { var result = ""; if (null != time && "" != time && time > 0) { //hour if (time >= 60 * 60) { result = parseInt(time / 3600); if(result< 10){ result = "0" + result + ":"; }else{ result = result + ":" } }else{ result = "00:" } //min if (time >= 60) { var tempMin = parseInt((time - parseInt(time / 3600) * 3600 )/ 60) ; if(tempMin < 10){ tempMin = "0" + tempMin + ":"; }else{ tempMin = tempMin + ":" } result = result + tempMin; }else{ result = result + "00:"; } //second var timeStr = time + ""; var tempSecond = parseInt(time%60); if(tempSecond < 10){ tempSecond = "0" + tempSecond; } if(timeStr.indexOf(".") >= 0){ tempSecond = tempSecond + timeStr.substring(timeStr.indexOf("."),timeStr.length); } result = result + tempSecond; }else{ result = "00:00:00.00"; } return result; } getCountTime = function(){ return document.getElementById('count-Time'); } setCountTime = function(value){ countTime = value; document.getElementById('count-second-Time').innerText = value; document.getElementById('count-Time').innerText = secondToTime(value); } getTotalTime = function(){ return document.getElementById('total-Time'); } setTotalTime = function(value){ totalTime = value; document.getElementById('total-Time').innerText = secondToTime(value); document.getElementById('total-second-Time').innerText = value; } setNewValue = function(value){ var newNode = document.createElement("div"); newNode.innerHTML = secondToTime(value); var oldNode = document.getElementById('result'); oldNode.appendChild(newNode); var newNode2 = document.createElement("div"); newNode2.innerHTML = value; var oldNode2 = document.getElementById('result-second'); oldNode2.appendChild(newNode2); } </script> </head> <body > <div style="width: 430px;border-width: 2px;border-style: solid;padding: 10px 10px 10px 10px;"> <input type="button" id ="begin" value="启动" onclick="beginChange()"/> <input type="button" id = "stop" value="停止" disabled="true" onclick="stopChange()"/> <input type="button" id = "commit" value="计次" disabled="true" onclick="addNewValue()"/> <input type="button" id = "reset" value="重置" disabled="true" onclick="resetStopWatch()"/> <br /> <div style="width:200px;margin-top:10px;" > <div style="padding-top:20px;">当前次数计时</div> <div id="count-Time" > 00:00:00.00 </div> <div style="padding-top:20px;">总时间计时</div> <div id="total-Time" > 00:00:00.00 </div> <div style="padding-top:20px;"> <div>平均值</div> <div id ="average" >00:00:00.00</div> </div> </div> <div style="width: 200px;position: absolute;left: 300px;top: 50px;" > <div style="padding-top:20px;">当前次数计时(秒)</div> <div id="count-second-Time"> 0 </div> <div style="padding-top:20px;">总时间计时(秒)</div> <div id="total-second-Time"> 0 </div> <div style="padding-top:20px;"> <div>平均值(秒)</div> <div id ="average-second" >0</div> </div> </div> </div> <div style="width:200px;margin-top:21px;"> 添加的次数列表 <div id="result" > </div> </div> <div style="width: 200px;position: absolute;left: 300px;top:253px;"> 添加的次数列表(秒) <div id="result-second" > </div> </div> </body></html>以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持武林网。
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