nsdate - Retrieve date from double value in NSUserDefaults (Swift) -

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hi i'm creating has 2 controls: nsslider , nstextfield update continuously. added nsdateformatter nstextfield shows current value of slider formatted time. slider has range of 0 86,400 units (so user slides seconds in range of 24 hours).

i connected app shared user defaults controller value stored user.

the app shows correct time in nstextfield, stores value in seconds. example, if user selected 06:32:14 when moving slider, system store 23534.2261709793 in key starttime

when user opens app again, see 06:32:14 expected.

my problem when want read variable in code:

i can read value double: 

let value = nsuserdefaults.standarduserdefaults().objectforkey("starttimevalue") as? double

this works fine, if try cast nsdate won't work (the value set nil). thought using nsdateformatter in code work (as way interface builder work user see date):

 let dateformatter = nsdateformatter()  dateformatter.datestyle = nsdateformatterstyle.nostyle  dateformatter.timestyle = nsdateformatterstyle.shortstyle  let date = dateformatter.datefromstring((value?.description)!)

in previous code created date formatter, set date style nothing (i want time), , time style short. giving value.description ("23534.2261709793") still won't work. date still nil.

is there i'm doing wrong?

the double storing / getting nsuserdefaults time interval thursday 1st january 1970. need feed time interval nsdate constructor can construct date you.

let value = nsuserdefaults.standarduserdefaults().objectforkey("starttimevalue") as? double let date = nsdate(timeintervalsince1970: value)

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