swift - Check if local time is after midnight in another timezone -


i want check if local time after midnight in time zone.

specifically, if right @ 11 pm saturday, or 1 sunday local time, want see if start of new week in central time (after 12 sunday).

you can use calendar's datecomponents(in: timezone, from: date) check time , date in timezone. specific application:

// create current date, central time zone, , current calendar let = date() let centraltimezone = timezone(abbreviation: "cst")! let calendar = calendar.current  let components = calendar.datecomponents(in: centraltimezone, from: now)  if components.weekday == 1 {     print("it sunday in central standard time.") } else {     print("it not sunday in central standard time.") }

what you're doing there asking current calendar give full set of datecomponents in specified timezone. components.weekday gives day of week int, starting 1 sunday in gregorian calendar.

if want know more if it's "tomorrow" somewhere, here's simple method:

func isittomorrow(in zone: timezone) -> bool {     var calendarinzone = calendar(identifier: calendar.current.identifier)     calendarinzone.timezone = timezone(abbreviation: "cst")!     return calendarinzone.isdateintomorrow(date()) }  if isittomorrow(in: centraltimezone) {     print("it tomorrow.") } else {     print("it not tomorrow.") }

isittomorrow(in: timezone) creates new calendar of same type current calendar (presumably .gregorian, never know) , sets timezone desired one. uses neat built-in calendar method .isdateintomorrow() check if current time "tomorrow" in target timezone.

there lots of other ways it, , depending on specific need there may built-in method save lot of work, it's worth reading through docs on calendar , datecomponents see what's available.


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