Re: Adding minutes to display time
Re: Adding minutes to display time
- Subject: Re: Adding minutes to display time
- From: "Eric E. Dolecki" <email@hidden>
- Date: Tue, 08 Dec 2015 23:18:26 +0000
Thank you everyone. I simplified the extension and now have it working
properly using a formatter.
extension NSDate
{
convenience
init(dateString:String) {
let dateStringFormatter = NSDateFormatter()
dateStringFormatter.calendar = NSCalendar(calendarIdentifier:
NSCalendarIdentifierGregorian)
dateStringFormatter.dateFormat = "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 val = 10 //Test
let calendar = NSCalendar.currentCalendar()
calendar.timeZone = NSTimeZone.localTimeZone()
calendar.locale = NSLocale(localeIdentifier: "en_US_POSIX")
let startDate = NSDate(dateString:"11:30")
let date = calendar.dateByAddingUnit(.Minute, value: val, toDate:
startDate, options: [])
let formatter = NSDateFormatter()
formatter.dateStyle = .NoStyle
formatter.timeStyle = .ShortStyle
let dateString = formatter.stringFromDate(date!)
print(dateString) //*Correct*
On Tue, Dec 8, 2015 at 5:24 PM David Duncan <email@hidden> wrote:
> 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>
> wrote:
>
>>
>> > On Dec 8, 2015, at 12:14 PM, Eric E. Dolecki <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
>> > _______________________________________________
>> >
>> > Cocoa-dev mailing list (email@hidden)
>> >
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>>
>> --
>> David Duncan
>>
>>
> --
> David Duncan
>
>
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