Javascript中的動態setInterval

我將爲HTML中的不同事件動態設置一個計時器。有生成一個HTML元素的功能，當阿賈克斯如下完成：Javascript中的動態setInterval

function buildOnlineQuizIns(courseId, onlineQuizes) { 
var items = ''; 
var d = new Date(); 
var timeStamp = d.getTime(); 
$.each(onlineQuizes, function (key, value) { 
    var date1 = new Date(value['startDate']); 
    var t1 = date1.getTime()+value['offsetTime']*60*1000; 
    var date2 = new Date(value['endDate']); 
    var t2 = date2.getTime()+value['offsetTime']*60*1000; 

    var startDate = convertDate(value['startDate'], value['offsetTime']); 
    var endDate = convertDate(value['endDate'], value['offsetTime']); 
    items += '<table id="quizOnlineItem'+value['qsClassId']+'" class="quizOnlineItem">' + 
      '<tr><td style="color: #0000cb; font-weight: bold; width: 70px;">Quiz Set:</td><td style="margin-left: 10px;">'+value['name']+'</td></tr>' + 
      '<tr><td style="margin-right: 10px; color: #0000cb; font-weight: bold;">Header:</td><td>' + value['quizHeader'] + '</td></tr>' + 
      '<tr><td style="margin-right: 10px; color: #00B300; font-weight: bold;">Start Date:</td><td>' + startDate + '</td></tr>' + 
      '<tr><td style="margin-right: 10px; color: #DB3315; font-weight: bold;">End Date:</td><td>' + endDate + '</td></tr>' + 
     '</table>' + 
     '<div id="countdown'+value['qsId']+'" class="timer">test</div>'; 
    var timeLeft = ''; 
    if(timeStamp<t1){ 
     seconds[value['qsId']] = t1 - timeStamp; 
     countdownTimer[value['qsId']] = setInterval(timer(value['qsId']), 1000); 
    }else if(timeStamp>t1 && timeStamp<t2){ 
     seconds[value['qsId']] = t2 - timeStamp; 
     countdownTimer[value['qsId']] = setInterval(timer(value['qsId']), 1000); 
    } 
}); 
return items;

}

並有定時器如下功能：

var countdownTimer = []; 
var seconds = []; 
function timer(qsId) { 
    alert(countdownTimer[qsId]); 
    var days  = Math.floor(seconds[qsId]/24/60/60); 
    var hoursLeft = Math.floor((seconds[qsId]) - (days*86400)); 
    var hours  = Math.floor(hoursLeft/3600); 
    var minutesLeft = Math.floor((hoursLeft) - (hours*3600)); 
    var minutes  = Math.floor(minutesLeft/60); 
    var remainingSeconds = seconds[qsId] % 60; 
    if (remainingSeconds < 10) { 
     remainingSeconds = "0" + remainingSeconds; 
    } 
    $('#countdown'+qsId).html(days + "day " + hours + ":" + minutes + ":" + remainingSeconds); 
    if (seconds[qsId] == 0) { 
     clearInterval(countdownTimer[qsId]); 
     $('#countdown'+qsId).html("Completed"); 
    } else { 
     seconds[qsId]--; 
    } 
}

然而，沒有任何更新時頁面加載。任何人都可以幫我解決這個問題。謝謝！！！

來源

2016-11-09 Ahad

你可以自己調試它，或發佈整個代碼？ –

當你傳遞給setInterval的函數，你必須傳遞功能，而無需調用它：

此調用時執行這條線的功能：

setInterval(timer(value['qsId']), 1000);

這調用該函數只有1秒後：

setInterval(function() { 
    timer(value['qsId']) 
}, 1000);

ps：沒有檢查這是否是問題，但我認爲這將是一個問題。

來源

2016-11-09 13:42:23

感謝馬修斯。計時器工作得很好。但倒計時的日子已超過2000天。這裏出了點問題。 – Ahad

Javascript中的動態setInterval

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