帮助停止setInterval

问题描述

| 不太确定如何设置。我试图做互联网告诉我的事情。

<?PHP

function animateFunds($startAmount,$finishAmount)
{
    echo \'<div id=\"fundage\" style=\"display:inline;\"> \';
    echo number_format($startAmount,2,\'.\',\',\') . \' </div>\';

    //we are shooting for about 5 SEOcnds of
    //animation total. So get total amount of money
    //we are going to cover,and figure out the
    //setInterval delay for JS
    $distanceInPennies = ($finishAmount - $startAmount) * 100;
    //5 secs in MS = 5000
    $delay = 5000 / $distanceInPennies;
    //round $delay
    $delay = floor($delay);
    //delay no less than 5 ms
    if($delay < 5) $delay = 5;

    /// countdown JS
echo \'<script type=\"text/javascript\">
        var thisFunc = setInterval(function () {

            //instantiate delay
            //delay = \' . $delay . \';

            // get current fundage
            var currentFund = document.getElementById(\"fundage\").innerHTML;
            currentFund = parseFloat(currentFund);

            // add a penny
            currentFund += 0.01;
            // round to 2 decimal places
            currentFund = Math.round(currentFund * 100)/100;
            // dont update more than finish amount
            if(currentFund > \' . $finishAmount . \') currentFund = \' . $finishAmount . \'; 

            //if finish amount reached,stop function
            if(currentFund = \' . $finishAmount . \') clearInterval(thisFunc);

            // update countdown div
            document.getElementById(\"fundage\").innerHTML = currentFund;

        },\' . $delay . \');
            </script>
        \';
    /// END countdown JS
}// END function    

?>

<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0     Transitional//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">
<html xmlns=\"http://www.w3.org/1999/xhtml\">
<head>
<Meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\" />
</head>
<body>

blah blah blah $<?PHP animateFunds(2.00,10.00); ?> after after after.

</body>
</html>

解决方法

您在setInterval中声明了一个动态函数，对该函数内的ѭ2call的调用将无法访问thisFunc变量。尝试声明该函数不在ѭ1的范围内，如下所示：

/// countdown JS
echo \'<script type=\"text/javascript\">
    function doTimer() {

    //instantiate delay
    //delay = \' . $delay . \';

    // get current fundage
    var currentFund = document.getElementById(\"fundage\").innerHTML;
    currentFund = parseFloat(currentFund);

    // add a penny
    currentFund += 0.01;
    // round to 2 decimal places
    currentFund = Math.round(currentFund * 100)/100;
    // dont update more than finish amount
    if(currentFund > \' . $finishAmount . \') currentFund = \' . $finishAmount . \'; 

    //if finish amount reached,stop function
    if(currentFund = \' . $finishAmount . \') clearInterval(thisFunc);

    // update countdown div
    document.getElementById(\"fundage\").innerHTML = currentFund;

}

var thisFunc = setInterval(\"doTimer()\",\' . $delay . \');
</script>\';

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