iPhone:Find the current timezone offset in HOURS

Question

How to find out the current timezone offset on the device in HOURS ?

Answer 1

-(void)getDeviceUTCOffset{

    NSDate *date = [NSDate date];
    NSTimeZone* deviceTimeZone_ = [NSTimeZone systemTimeZone];
    float offset = [deviceTimeZone_ secondsFromGMTForDate:date] / 3600.0;   
}

To test code - test on a device

change device Timezone in

Settings > General > Date Time
Turn off SET AUTOMATICALLY
Then tap TimeZone and choose major cities east/west of you
Run code and check float offset

Compare value to cities on this site

e.g. heres Helsinki

Standard time zone: UTC/GMT +2 hours - as of Nov

http://www.timeanddate.com/worldclock/city.html?n=101

Check against countries with British Summer Time or their equivalent.