CODEWITHSUNDEEP
iphoneobjective-clocalizationnsdate
dpigera
dpigera

Reputation: 3369

iPhone: NSDate convert GMT to local time

I currently have an API call returning me a date/time in the format: 2010-10-10T07:54:01.878926

Can I assume this is GMT? I also converted this to an NSDate object. Is there a way to use the local iPhone time to recalculate the time?

Upvotes: 10

Views: 26189

Answers (4)

nesimtunc
nesimtunc

Reputation: 869

This code will convert the GMT time to the device's local time.

NSDate* localDateTime = [NSDate dateWithTimeInterval:[[NSTimeZone systemTimeZone] secondsFromGMT] sinceDate:pubDate];

Upvotes: 23

Minami
Minami

Reputation: 5

NSDate *now = [NSDate date];
NSLog(@"%@", [now dateWithCalendarFormat:@"%Y-%m-%d %H:%M:%S" 
              timeZone:[NSTimeZone timeZoneWithName:@"GMT"]]);

Upvotes: -2

JFK
JFK

Reputation: 29

NSDate *sourceDate = [NSDate dateWithTimeIntervalSince1970:gmtTimestamp];
NSTimeZone* destinationTimeZone = [NSTimeZone systemTimeZone];
NSInteger sourceGMTOffset = [destinationTimeZone secondsFromGMTForDate:0];
NSInteger destinationGMTOffset = [destinationTimeZone secondsFromGMTForDate:sourceDate];
NSTimeInterval interval = destinationGMTOffset - sourceGMTOffset;
NSDate* destinationDate = [[[NSDate alloc] initWithTimeInterval:interval sinceDate:sourceDate] autorelease];
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
dateFormatter.dateFormat = @"yyyy-MM-dd'T'HH:mm";
[dateFormatter setTimeZone:destinationTimeZone];
NSString *localTimeString = [dateFormatter stringFromDate:destinationDate];

Upvotes: 1

Iñigo Beitia
Iñigo Beitia

Reputation: 6353

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
dateFormatter.dateFormat = @"yyyy-MM-dd'T'HH:mm";

NSTimeZone *gmt = [NSTimeZone timeZoneWithAbbreviation:@"GMT"];
[dateFormatter setTimeZone:gmt];
NSString *timeStamp = [dateFormatter stringFromDate:[NSDate date]];
[dateFormatter release];

Upvotes: 28

Related Questions