NSTimeZone localTimeZone example ios

localTimeZone

Returns an object that forwards all messages to the default time zone for the current application.

+ (NSTimeZone *)localTimeZone

Return Value

An object that forwards all messages to the default time zone for the current application.

Discussion of [NSTimeZone localTimeZone]

The local time zone represents the current state of the default time zone at all times. If you get the default time zone (using defaultTimeZone) and hold onto the returned object, it does not change if a subsequent invocation of setDefaultTimeZone: changes the default time zone—you still have the specific time zone you originally got. The local time zone adds a level of indirection, it acts as if it were the current default time zone whenever you invoke a method on it.

Example of [NSTimeZone localTimeZone]

int  gmtOffset =  [[NSTimeZone localTimeZone] secondsFromGMT];
 int daylightOffset =  [[NSTimeZone localTimeZone] daylightSavingTimeOffset];

  int daySeconds =  ((int)([date timeIntervalSinceReferenceDate]+gmtOffset+daylightOffset))%(86400+1);

 NSLog(@"Day seconds: %i", daySeconds);

Example of [NSTimeZone localTimeZone]

NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
[calendar setTimeZone:[NSTimeZone localTimeZone]];

NSDateComponents *comps = [calendar components:NSHourCalendarUnit|NSMinuteCalendarUnit| NSSecondCalendarUnit
                                      fromDate:[NSDate date]];
NSInteger time = [comps hour] * 3600 + [comps minute] * 60 + [comps second];

NSLog(@"Day seconds: %i", time);