javascript - 使用周数跳转到/显示日历中的特定周

Question

是否有可能通过使用周数跳转到/显示特定周？例如，如果我想显示第 43 周，有什么办法可以做到这一点吗？

我知道如何使用 goToDate 选项，然后将 View 更改为周，但是是否有可能使用周数来做到这一点？

Answer 1

我在How to convert a week number to a date in Javascript找到了相关功能。有了它，只需传递年份和周数，它就会返回一个格式正确的日期对象:

var gotoweek = firstDayOfWeek( date.year(), date.weeks() );
$('#mycalendar').fullCalendar( 'gotoDate', gotoweek );

在以下示例中，单击任意一天将带我们进入相对周数的周 View :

// Create a date object based on year and week number
// https://stackoverflow.com/a/19375264/1287812
function firstDayOfWeek( year, week ) {
  // Jan 1 of 'year'
  var d = new Date(year, 0, 1),
    offset = d.getTimezoneOffset();

  // ISO: week 1 is the one with the year's first Thursday 
  // so nearest Thursday: current date + 4 - current day number
  // Sunday is converted from 0 to 7
  d.setDate(d.getDate() + 4 - (d.getDay() || 7));

  // 7 days * (week - overlapping first week)
  d.setTime(d.getTime() + 7 * 24 * 60 * 60 * 1000 * (week + (year == d.getFullYear() ? -1 : 0)));

  // daylight savings fix
  d.setTime(d.getTime() + (d.getTimezoneOffset() - offset) * 60 * 1000);

  // back to Monday (from Thursday)
  d.setDate(d.getDate() - 3);

  return d;
}

$('#mycalendar').fullCalendar({
  header: {
    left: 'prev,next today',
    center: 'title',
    right: 'month agendaWeek agendaDay'
  },
  weekNumbers: true,
  dayClick: function(date, jsEvent, view) {
    var gotoweek = firstDayOfWeek( date.year(), date.weeks() );
    $('#mycalendar').fullCalendar( 'gotoDate', gotoweek );
    $('#mycalendar').fullCalendar( 'changeView', 'agendaWeek' );
  },
  events: [{
    title: 'Click me 1',
    msg: 'I am clipped to the left which is annoying',
    start: '2014-09-01 06:00:00',
    end: '2014-09-01 08:00:00',
    editable: false,
    allDay: false
  }, {
    title: 'Click me 2',
    msg: 'I am OK',
    start: '2014-09-04 14:00:00',
    end: '2014-09-04 15:00:00',
    editable: false,
    allDay: false
  }]
});

#mycalendar {
  margin: 30px;
  height: 500px;
  max-width: 500px;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script type="text/javascript" src="//cdnjs.cloudflare.com/ajax/libs/moment.js/2.8.3/moment.min.js"></script>
<script type="text/javascript" src="//cdnjs.cloudflare.com/ajax/libs/fullcalendar/2.1.1/fullcalendar.min.js"></script>
<link rel="stylesheet" type="text/css" href="//cdnjs.cloudflare.com/ajax/libs/fullcalendar/2.1.1/fullcalendar.min.css">
<div id="mycalendar"></div>