Fullcalendar和时区.救命,我做错了

Question

我不知何故做错了.我正在绊倒时区Fullcalendar.我试过设置ignoreTimezone为真和假,但似乎并不重要.这是在下面的代码中的两个地方,因为我不确定它来自哪个文档.

我的数据源是隐藏的表单字段.数据去出的FullCalendar是通过将5小时(CDT)调整.数据云中,以FullCalendar不是除去5小时调整.

在后端,我只是保存并返回JSON字符串而不处理它(甚至解码它)

Page Load:
  Data In: Empty, no data
  Data Edit: drag from noon to 2pm (CDT), then submit form
  Data Out: Use clientEvent to get data, and JSON.stringify to put into form field.
    [{"id":6844,"title":"Open","start":"2011-04-19T17:00:00.000Z","end":"2011-04-19T19:00:00.000Z","allDay":false}]

Page Load (after submitting form):
  Data In: Use JSON.parse to load data from hidden form field.  This is the incoming data, but the event is shifted to 5pm (CDT) in the control.  
    [{"id":6844,"title":"Open","start":"2011-04-19T17:00:00.000Z","end":"2011-04-19T19:00:00.000Z","allDay":false}]
  Data Out:  Without changing the control, it's now:
    [{"id":6844,"title":"Open","start":"2011-04-19T22:00:00.000Z","end":"2011-04-20T00:00:00.000Z","allDay":false}]

我设置Fullcalendar如下:

// Fullcalendar for business hours page

jQuery(document).ready(function() {

  jQuery('#edit-submit').bind("click", business_hours_set);
  jQuery('#edit-preview').bind("click", business_hours_set);

  jQuery('#calendar').fullCalendar({

    // configure display
    header: {
      left: '',
      center: '',
      right: ''
    },
    ignoreTimezone: false,
    defaultView: 'agendaWeek',
    allDaySlot: false,
    firstHour: 8,

    // configure selection for event creation
    selectable: true,
    selectHelper: true,
    select: business_hours_add,

    // configure data source
    editable: true,
    eventSources: [
    {
      events: jQuery.parseJSON(jQuery('#fullcalendar_data').val()),
      color: '#992B0A',
      textColor: 'white',
      ignoreTimezone: false
    }
    ],

    // configure editing
    eventClick: function(calEvent) {
      business_hours_delete(calEvent.id);
    }
  });
  alert(jQuery('#fullcalendar_data').val());
});

function business_hours_add(startDate, endDate) {
  var calendar = jQuery('#calendar');
  var newid = Math.ceil(Math.random()*64000);
  calendar.fullCalendar('renderEvent',
  {
    id: newid,
    title: "Open",
    start: startDate,
    end: endDate,
    allDay: false
  },
  true // make the event "stick"
  );
  calendar.fullCalendar('unselect');
}

var business_hours_selectedId = -1;
function business_hours_delete(id) {

  business_hours_selectedId = id;

  jQuery( "#dialog-confirm" ).dialog({
    resizable: false,
    height:160,
    modal: true,
    buttons: {
      "Yes, delete!": function() {
        calendar = jQuery('#calendar');
        calendar.fullCalendar( 'removeEvents', business_hours_selectedId);
        jQuery( this ).dialog( "close" );
      },
      Cancel: function() {
        jQuery( this ).dialog( "close" );
      }
    }
  }, id);
}

function business_hours_set() {
  var data = jQuery('#calendar').fullCalendar( 'clientEvents' );

  // data is cyclical.  Create a new data structure to stringify.
  var ret = [];
  for(var i=0; i<data.length; i++) {
    var datum = {
      id: data[i].id,
      title: data[i].title,
      start: data[i].start,
      end: data[i].end,
      allDay: data[i].allDay
    }
    ret[i] = datum;
  }
  // stringify and return
  jQuery('#fullcalendar_data').val(JSON.stringify(ret));
  alert(JSON.stringify(ret));
}

我究竟做错了什么？

先谢谢你,迈克

Answer 1

您将 CDT 调整日期序列化为 UTC 日期（从而获得 5 小时的轮班），因此当读回它们时，它们会重新调整为 CDT，依此类推。

由于无法在 JS 日期对象上设置时区，因此 Fullcalendar 在内部将它们表示为 UTC 日期，但会根据输入时间调整时区偏移。

$.fullCalendar.parseISO8601('2011-04-19T17:00:00.000-05:00');
// Tue Apr 19 2011 22:00:00 GMT+0000 (GMT)  <-- note time shift

这就是为什么当您序列化为 JSON 时，您会得到一个带有“Zulu”（UTC）时区的字符串：

var dt = $.fullCalendar.parseISO8601('2011-04-19T17:00:00.000-05:00');
JSON.stringify( dt ); // "2011-04-19T22:00:00.000Z"

您需要将日期追溯到您的时区。Fullcalendar 似乎没有这个功能，所以你需要这样做：

// detect local timezone offset
var localoffset = (new Date()).getTimezoneOffset();
// "unadjust" date
ret = new Date( ret.valueOf() + (localoffset * 60 * 1000) );

// serialize
function pad (n) { return String(n).replace(/^(-?)(\d)$/,'$10$2'); }
JSON.stringify( ret )
     // replace Z timezone with current
     .replace('Z', pad(Math.floor(localoffset / 60))+':'+ pad(localoffset % 60));

// should result in something like: "2011-04-21T19:00:00.000-05:00"

使用 Fullcalendar 可能有更好的方法来解决这个问题，但我不熟悉它。

代码未经测试：我生活在格林尼治标准时间，没有夏令时，并且不想为了看到它工作而弄乱我的系统（YMMW）。:-)