dateFromComponents提供错误的日期

Question

我正在尝试从Date获取NSDateComponents个对象，但Calendar.date(from: Components)在我原始组件的日期前一天给出了一个日期。

let calendar = NSCalendar(calendarIdentifier: NSCalendarIdentifierGregorian)
let dateComponents = calendar!.components([.Year , .Month , .Weekday, .Day], fromDate: NSDate())
dateComponents.year = 2015
dateComponents.month = 9
dateComponents.day = 1

po calendar!.dateFromComponents(dateComponents)
▿ Optional(2015-08-31 18:30:00 +0000)
  - Some : 2015-08-31 18:30:00 +0000

Answer 1

将calendar对象的时区设为UTC，并尝试从Date获取calendar。

calendar.timeZone = NSTimeZone(name: "UTC")!

Answer 2

它为您提供了var markers = []; var map; var labels = 'ABCD'; var labelIndex = 0; function addMarker(location) { var marker = new google.maps.Marker({ position: location, label: labels[labelIndex++ % labels.length], icon: 'http://maps.google.com/mapfiles/ms/icons/green-dot.png' map: map }); markers.push(marker);时区，只需通过像这样转换NSDateFormatter来转换日期，您就会得到答案 -

UTC