用下面代码写的倒计时，在安卓pc打开都正常但是ios打开就显示NaN



```html

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>JS实现倒计时(天数,时,分,秒)</title>
 
</head>
<body>
 
<h2>剩余时间:</h2>
<div id="timer"></div>
 
 
<script language="javascript" type="text/javascript">
    timer('2023-11-20 12:00:00','day');
 
    /**
     * 入参第一个为时间字符串，第二个参数为模式选择，如果传入'day'，按天数倒计时到秒，不传值，按小时精确到秒
     * @param timeStr
     * @param item
     */
    function timer(timeStr,item){
        setInterval(function(){
            let nowTime = new Date(timeStr) - new Date;
            let minutes = parseInt(nowTime / 1000 / 60 % 60, 10);//计算剩余的分钟
            let seconds = parseInt(nowTime / 1000 % 60, 10);//计算剩余的秒数
 
 
            minutes = checkTime(minutes);
            seconds = checkTime(seconds);
            if(item==='day'){
                let days = parseInt(nowTime / 1000 / 60 / 60 / 24, 10); //计算剩余的天数
                let hours = parseInt(nowTime / 1000 / 60 / 60 % 24, 10); //计算剩余的小时
                days = checkTime(days);
                hours = checkTime(hours);
                document.getElementById('timer').innerHTML=days + "天" + hours + "小时" + minutes + "分" + seconds + "秒";
            }else{
                let hours = parseInt(nowTime / ( 1000 * 60 * 60), 10); //计算剩余的小时
                hours = checkTime(hours);
                document.getElementById("timer").innerHTML = hours + "小时" + minutes + "分" + seconds + "秒";
            }
        },1000);
    }
 
    function checkTime(i) { //将0-9的数字前面加上0，例1变为01
        if (i < 10) {
            i = "0" + i;
        }
        return i;
    }
</script>
</body>
</html>

```

改下面试试，主要是下面2句

img



<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>JS实现倒计时(天数,时,分,秒)</title>

</head>
<body>

    <h2>剩余时间:</h2>
    <div id="timer"></div>


    <script language="javascript" type="text/javascript">
        timer('2023-11-20 12:00:00', 'day');

        /**
         * 入参第一个为时间字符串，第二个参数为模式选择，如果传入'day'，按天数倒计时到秒，不传值，按小时精确到秒
         * @param timeStr
         * @param item
         */
        function timer(timeStr, item) {

            timeStr = timeStr.replace(/-/g, '/');//-替换成/，有些浏览器不支持中杠线的字符串作为Date的参数
            setInterval(function () {
                let nowTime = new Date(timeStr).getTime() - new Date().getTime();//补充完整来，获取时间戳
                let minutes = parseInt(nowTime / 1000 / 60 % 60, 10);//计算剩余的分钟
                let seconds = parseInt(nowTime / 1000 % 60, 10);//计算剩余的秒数


                minutes = checkTime(minutes);
                seconds = checkTime(seconds);
                if (item === 'day') {
                    let days = parseInt(nowTime / 1000 / 60 / 60 / 24, 10); //计算剩余的天数
                    let hours = parseInt(nowTime / 1000 / 60 / 60 % 24, 10); //计算剩余的小时
                    days = checkTime(days);
                    hours = checkTime(hours);
                    document.getElementById('timer').innerHTML = days + "天" + hours + "小时" + minutes + "分" + seconds + "秒";
                } else {
                    let hours = parseInt(nowTime / (1000 * 60 * 60), 10); //计算剩余的小时
                    hours = checkTime(hours);
                    document.getElementById("timer").innerHTML = hours + "小时" + minutes + "分" + seconds + "秒";
                }
            }, 1000);
        }

        function checkTime(i) { //将0-9的数字前面加上0，例1变为01
            if (i < 10) {
                i = "0" + i;
            }
            return i;
        }
    </script>
</body>
</html>

img


有其他问题可以继续交流~