UILocalNotification 时区错误

Question

创建新的 UILocalNotification 并安排通知时，时间会因时区而发生变化。我设置的日期被 UiLocalNotifcation 更改为时区。我不想发生这种情况

public static void RegisterLocalNotification(ServiceModel.Types.ParkingTicket parkingTicket)
    {

        if (parkingTicket == null || parkingTicket.ExpiringSoon) return;

        var startDate = parkingTicket.UtcStart.ToLocalTime();

        NSDate nsStartDate = startDate.AddMinutes(parkingTicket.Duration - 10).UtcDateTimeToNSDate();

        var notification = new UILocalNotification
        {
            FireDate = nsStartDate,
            TimeZone = null,
            AlertAction = Resources.Strings.ExtendTicket,
            AlertBody = string.Format
            (Resources.Strings.FormattedExpiringMessage, 
            parkingTicket.TimeLeft.Description(false),
            parkingTicket.Address,parkingTicket.Car.RegistrationNumber),
            RepeatInterval = 0,
            HasAction = true,
            UserInfo = GetDictionaryFromParkingTicket(parkingTicket),
            SoundName = UILocalNotification.DefaultSoundName,
            ApplicationIconBadgeNumber = 1
        };

        UIApplication.SharedApplication.ScheduleLocalNotification(notification);
    }

        public static NSDate UtcDateTimeToNSDate(this DateTime utcDateTime)
    {
        var reference = new DateTime(2001, 1, 1, 0, 0, 0);
        return NSDate.FromTimeIntervalSinceReferenceDate((utcDateTime - reference).TotalSeconds);
    }

我试过使用 TimeZone = NSTimeZone.LocalTimeZone。

Answer 1

您正在将 UTC 日期转换为本地日期：

var startDate = parkingTicket.UtcStart.ToLocalTime ();

然后您将本地日期视为 UTC 日期，从而进行两次转换：

NSDate nsStartDate = startDate.AddMinutes(parkingTicket.Duration - 10).UtcDateTimeToNSDate();

只需这样做：

var startDate = parkingTicket.UtcStart;
var nsStartDate = (NSDate) startDate.AddMinutes (parkingTicket.Duration - 10);

显式 NSDate 转换会做正确的事。

UILocalNotification 时区错误

UILocalNotification Wrong time zone

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