Re: Adding minutes to display time
Re: Adding minutes to display time
- Subject: Re: Adding minutes to display time
- From: David Duncan <email@hidden>
- Date: Tue, 08 Dec 2015 14:24:02 -0800
> On Dec 8, 2015, at 2:04 PM, Eric E. Dolecki <email@hidden> wrote:
>
> I tried an extension I found. It's off by 5 hours...
>
> extension NSDate
> {
> convenience
> init(dateString:String) {
> let dateStringFormatter = NSDateFormatter()
> dateStringFormatter.calendar = NSCalendar(calendarIdentifier: NSCalendarIdentifierGregorian)
> dateStringFormatter.dateFormat = "yyyy-MM-dd HH:mm"
> dateStringFormatter.locale = NSLocale(localeIdentifier: "en_US_POSIX")
> dateStringFormatter.timeZone = NSTimeZone.localTimeZone()
> let d = dateStringFormatter.dateFromString(dateString)!
> self.init(timeInterval:0, sinceDate:d)
> }
> }
>
> ...
>
> let calendar = NSCalendar.currentCalendar()
> calendar.timeZone = NSTimeZone.localTimeZone()
> calendar.locale = NSLocale(localeIdentifier: "en_US_POSIX")
> let startDate = NSDate(dateString:"2015-12-08 7:30")
> let date = calendar.dateByAddingUnit(.Minute, value: 5, toDate: startDate, options: [])
> print (date!) //This is way off. How to fix this?
A NSDate’s description aways prints its time in UTC, not the local time zone. If you print the result of a properly constructed NSDateFormatter you should see the correct results.
>
>
>
> On Tue, Dec 8, 2015 at 3:54 PM David Duncan <email@hidden <mailto:email@hidden>> wrote:
>
> > On Dec 8, 2015, at 12:14 PM, Eric E. Dolecki <email@hidden <mailto:email@hidden>> wrote:
> >
> > Hey all,
> >
> > I am being supplied a time (not day specific). Say "7:30 AM" - as a string.
> > Could be PM.
> >
> > I need to make a slider with a range of 1 minute to 120 mins. Moving the
> > slider adjusts the 7:30 AM display. So I am adding minutes to the display
> > time. What's the best way to do this? I am using Swift.
>
> NSCalendar and NSDateComponents are still the best way to do these types of time modifications (with NSDateFormatter for display).
>
> >
> > I'll be googling too.
> >
> > Thanks,
> > Eric
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> >
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> --
> David Duncan
>
--
David Duncan
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