Objective-C Challenge

I have started learning objective-c.  Coming from C# background, things are not straight forward, here is one of the challenge i completed today i.e. to subtract birthday date with current date and displaying results in second.

 

I am learning objective-c using big nerd ranch guide.  Turning out to be a good book

//

//  main.m

//  TimeAfterTime

//

//  Created by Sumit Gupta on 12/07/12.

//  Copyright (c) 2012 __MyCompanyName__. All rights reserved.

//

 

#import <Foundation/Foundation.h>

 

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

{

 

    @autoreleasepool {

       

        NSDateComponents *comps = [[NSDateComponents alloc]init];

        [comps setYear:1981];

        [comps setMonth:3];

        [comps setDay:21];

        

        NSCalendar *g = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];

        NSDate *dateOfBirth = [g dateFromComponents:comps];

        

        NSDate *currentDate = [NSDate date];

        double d = [currentDate timeIntervalSinceDate:dateOfBirth];

        

        

        NSLog(@”difference is %f”,d );

        

        

       

    }

    return 0;

}

 

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