Not able to set NSTimeZone to a required format

Question

I have a TimeZone as NSString value given as "GMT-09:00".

All I want is to setup my NSTimeZone with this format. I tried but wasn't able to do this. This time may vary every time so i can't set it as static in the method

eg. i can't do this -- timeZoneForSecondsFromGMT:(-9*3600).

Also, can I convert the above format (GMT-09:00) into number of seconds anyhow??

EDIT : I just want to set the time zone to a specific GMT format. It could be anything, GMT-09:00, GMT+05:30, etc.

If it was a static value I could have used the below method for NSTimeZone.

[formatter setTimeZone:[NSTimeZone timeZoneForSecondsFromGMT:(-9*3600)]];

But the value "GMT-09:00" is an NSString. So everytime, I would have to break the string and get the values for Hours and minutes. Is there an easier way?????

Thanks for the help!

Answer 1

have you tried something like this?

NSString *tzStr = @"GMT-09:00";
NSTimeZone *tz = [[NSTimeZone alloc] initWithName:tzStr];
NSLog(@"Tz: %@", tz);
NSLog(@"Offset: %d", [tz secondsFromGMT]);

// Tz: GMT-0900 (GMT-09:00) offset -32400
// Offset: -32400

works with @"GMT+5:30" too.

// Tz: GMT+0530 (GMT+05:30) offset 19800

and then just use [formatter setTimeZone:tz];

Answer 2

this one is helpful to you. optimized help

float offsetSecond = ([[NSTimeZone systemTimeZone] secondsFromGMT] / 3600.0);