Improve company productivity with a Business Account.Sign Up

x
  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 571
  • Last Modified:

Objective C code question

Hi,
I'm working my way through a book on Obj C. Please look at the code below and my explanation and tell me why my results are not the same with using the Class and Instance methods.
---
If I use the class method of systemTimeZone it's telling me (I think) that I am on Daylight savings time.
However, If I use an instance method for isDaylightSavingTime I am getting a 0 returned.
Help?

Thanks

nacht

#import <Foundation/Foundation.h>

int main (int argc, const char * argv[])
{

NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];





NSTimeZone *zone = [[NSTimeZone alloc] init]; // Create an instance

NSTimeZone *c = [NSTimeZone systemTimeZone]; // Class method so don't need to create an instance

NSLog(@"Time zone is %@\n", c);

BOOL z =[zone isDaylightSavingTime];


NSLog(@"Is it set to Daylight Savings time: %d\n", z);


[pool drain];
return 0;
}


OUTPUT:
2012-03-20 11:05:02.525 TimeZone[1259:903] Time zone is US/Eastern (EDT) offset -14400 (Daylight)
2012-03-20 11:05:02.526 TimeZone[1259:903] Is it set to Daylight Savings time: 0
0
nachtmsk
Asked:
nachtmsk
1 Solution
 
leuqarteCommented:
NSTimeZone *c = [NSTimeZone systemTimeZone]; 

Open in new window

works as expected...

NSTimeZone *zone = [[NSTimeZone alloc] init];

Open in new window

creates a time zone object but isn't set to current system time zone automatically.
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

Featured Post

Free Tool: Port Scanner

Check which ports are open to the outside world. Helps make sure that your firewall rules are working as intended.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Tackle projects and never again get stuck behind a technical roadblock.
Join Now