jQuery Countdown 有问题吗？函数 serverSync: serverTime

Question

serverSync: serverTime 函数从服务器返回值，但我检查了服务器和客户端时间都相同。当我调用服务器与服务器同步时，它不会显示倒计时。帮帮我？

    $(function() {
        var shortly = new Date();
        var newTime = new Date('April 9, 2010 20:38:10');
        //for loop divid
        /// 
        $('#defaultCountdown').countdown({
            until: shortly, onExpiry: liftOff, onTick: watchCountdown, serverSync: serverTime
        });
        $('#div1').countdown({ until: newTime });
    });
    function serverTime() {
        var time = null;
        $.ajax({
            type: "POST",
            //Page Name (in which the method should be called) and method name
            url: "Default.aspx/GetTime",
            // If you want to pass parameter or data to server side function you can try line
            contentType: "application/json; charset=utf-8",
            dataType: "json",
            data: "{}",
            async: false,
            //else If you don't want to pass any value to server side function leave the data to blank line below
            //data: "{}",  
            success: function(msg) {
                //Got the response from server and render to the client

                time = new Date(msg.d);
                alert(time);
            },
            error: function(msg) {
                time = new Date(); 
                alert('1');
            }
        });
        shortly = time;
        return time;

    }
 [WebMethod]
public static String GetTime()
{
    DateTime dt = new DateTime(); 
    dt = Convert.ToDateTime("April 9, 2010 22:38:10");  
    return dt.ToString("dddd, dd MMMM yyyy HH:mm:ss");
}

Answer 1

我意识到这已经快一年了，但如果有人遇到类似问题，我想了一个可以避免 AJAX 复杂性的解决方案。由于我们使用服务器上的日期，我们不必担心客户端上的时间，因此我们不必调整时区或客户端时钟关闭。它应该与网络延迟一样准确。

<script type="text/javascript">
    jQuery(document).ready(
        function() {
            var eventTime = new Date('March 20, 2011 08:00:00');
            jQuery('#div_countdown').countdown({ until: eventTime,
                serverSync: function() { return new Date('<%=DateTime.Now.ToString("dddd, dd MMMM yyyy HH:mm:ss")%>'); }
            });
        }
    );
</script>

Answer 2

你不应该在这里调用 serverTime() -

$('#defaultCountdown').countdown({
    until: shortly, onExpiry: liftOff, onTick: watchCountdown, serverSync: serverTime
});

像这样：

$('#defaultCountdown').countdown({
    until: shortly, onExpiry: liftOff, onTick: watchCountdown, serverSync: serverTime()
});

Answer 3

async: true,

这将解决问题，但不会同步。也许其他人可以弄清楚为什么async: false，会打破这个？我不知道。