NSTimeZone daylightSavingTimeOffset example ios

daylightSavingTimeOffset

Returns the current daylight saving time offset of the receiver.

- (NSTimeInterval)daylightSavingTimeOffset

Return Value

The daylight current saving time offset of the receiver.

Example of [NSTimeZone daylightSavingTimeOffset]

NSTimeZone *systemTimeZone = [NSTimeZone systemTimeZone];
NSLog(@"%lf", [systemTimeZone daylightSavingTimeOffset]); //This works
[systemTimeZone release]; //Testing release do not actually do this

systemTimeZone = [NSTimeZone systemTimeZone];
NSLog(@"%lf", [systemTimeZone daylightSavingTimeOffset]); //This works
[systemTimeZone release]; //Testing release do not actually do this

systemTimeZone = [NSTimeZone systemTimeZone];
NSLog(@"%lf", [systemTimeZone daylightSavingTimeOffset]); //This crashes EXC_BAD_ACCESS
//The cached systemTimeZone at this point has been over released.

Example of [NSTimeZone daylightSavingTimeOffset]

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

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

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