Time Zone data for iOS and Mac OS X
NSTimeZone is a class that presents IANA time zone data as an Objective-C (objective-c) class. It's part of the Foundation framework (foundation) on Mac OS X (osx) and iOS (ios) and in Cocotron and GNUStep.
Questions tagged [nstimezone]
255 questions
8
votes
5 answers
NSDate independent of timezone?
I have an app that displays a timetable of certain ferry trips.
If I travel to a different timezone - say 4 hours behind, a 10am ferry trip now shows up as 6am?
I know this has got to do with how dates are treated based on their timezones, but I…
Rog
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8
votes
2 answers
Get number of days between two NSDate dates in a particular timezone
I found the codes to calculate days difference between two dates here.
I write a method :
-(NSInteger)daysWithinEraFromDate:(NSDate *) startDate toDate:(NSDate *) endDate
{
NSCalendar *gregorian = [[NSCalendar alloc]
…
Vigor
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7
votes
1 answer
NSTime: Why [NSDateComponent date] returns nil here?
I want to convert a NSDate from one timezone to another.
Here is my code:
NSDate* convertTime(NSDate* fromDate, NSTimeZone* fromTimeZone, NSTimeZone* toTimeZone) {
if (fromTimeZone == toTimeZone) {
return fromDate;
}
…
Anthony Kong
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6
votes
1 answer
Set specific timezone globally for app to use
I'm writing an app that needs to display and calculate all dates, times, timeintervals etc. from a specific, given timezone in Europe. Meaning, if I'm, say, in Paris, the app works flawlessly now, but if I go to New York, the app should display and…
JiaYow
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6
votes
2 answers
NSCalendar dateFromComponents: GMT timezone instead of systemTimeZone
This code
NSCalendar *calendar =[NSCalendar currentCalendar];
[gregorian setTimeZone:tz];
NSLog(@"%@", [gregorian timeZone]);
NSDateComponents *comp = [gregorian components:(NSYearCalendarUnit | NSMonthCalendarUnit) fromDate:[NSDate date]];
[comp…
Mitry
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6
votes
2 answers
What is Difference among following time zones in swift
let timeZone = NSTimeZone.system.description
let localTimeZone = TimeZone.ReferenceType.local.description
let currentTimeZone = TimeZone.current.description
let defaultTimeZone = TimeZone.ReferenceType.default.description
let autoUpdateTimezon =…
Jaydeep Vyas
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6
votes
2 answers
Storing an absolute NSDate, not relative to a timezone
I am creating an iOS app to track attendance. Each attendance entry is stored in an object which has a status attribute (e.g. present, absent) and an NSDate attribute called date which denotes the day which that attendance record was taken. When I…
Skoota
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5
votes
1 answer
NSDatePicker timezone weirdness
I have an NSDatePicker in my nib file. In code, I set it's timezone to be the GMT calendar's timezone:
[datePicker setTimeZone:[calendar timeZone]];
I only really care about the time (hours, minutes) on the datepicker which I populate…
JPC
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5
votes
1 answer
Do NSDate's in CoreData encapsulate time zone?
I keep dates and times in my CoreData store and need to accurately present to users the time as originally entered. The problem is that if they entered 4:00 on the East Coast, then later look at the recorded time on the West Coast, it appears as…
ed94133
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5
votes
2 answers
NSDate behaviour when saving to plist
I am creating a date from [NSdate date] and saving it to plist, Here is how I am creating a date
- (void)applicationWillResignActive:(UIApplication *)application
{
NSCalendar *gregorian = [[NSCalendar alloc]…
Ranjit
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4
votes
2 answers
GMT timezone conversion in objective c
I am trying to convert nsstring to nsdate and then to the systemtimezone. Is my code right? Any help appreciated.
NSString *str=@"2012-01-15 06:27:42";
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[NSDateFormatter…
stefanosn
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4
votes
1 answer
iPhone - How to get time zone offset?
We have NSTimeZone class that tells more about the time zone.
But I want to get only the offset of the time. For example: +05.30 is offset for Inida
In other words offset of time with reference to UTC.
One problem with following code is that it…
Satyam
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4
votes
1 answer
How can I map tz database names to city and country names?
Is there a publicly available mapping from tz database (aka zoneinfo database, aka Olson database) IDs to city and country? For example:
"Pacific/Auckland" => "Auckland, New Zealand"
"Europe/Copenhagen" => "Copenhagen, Denmark"
"Europe/Paris" =>…
Simon Cave
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4
votes
2 answers
IOS Time zone abbreviation without GMT offset. Need directly like IST,EST etc
NSTimeZone *timezone = [NSTimeZone systemTimeZone];
NSString *timeZoneAbberivation = [timezone abbreviation];
timeZoneAbberivation is printing like GMT+5:30 like that. But I need GMT+5:30 to be printed as IST. (IST is of India/Kolkatta).
Suppose…
mohan kumar
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- 1
4
votes
1 answer
How to get current date in swift 3?
I want to get current date and time zone of user in Swift 3. I tried in Swift 2.2 following code :
static var localTimeZoneAbbreviation: String { return NSTimeZone.localTimeZone().abbreviation!}
Mohsin Qureshi
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