NSDate+Custom

NSDate+Custom.h

//
//  NSDate+Custom.h
//
//  Created by TheFinestArtist
//

#import <Foundation/Foundation.h>

#define DATE_FORMAT_SERVER @"yyyy-MM-dd'T'HH:mm:ss.SSS'Z'"
#define DATE_FORMAT_POST @"yy/MM/dd HH:mm"
#define DATE_FORMAT_WHOLE @"yyyy/MM/dd HH:mm"
#define DATE_FORMAT_DATE @"yyyy/MM/dd"
#define DATE_FORMAT_TIME @"HH:mm"

@interface NSDate (Custom)

+ (NSDate *)dateFromServerString:(NSString *)string;
+ (NSString *)stringWithDate:(NSDate *) date withFormat:(NSString *)format;

@end

NSDate+Custom.m

//
//  NSDate+Custom.m
//
//  Created by TheFinestArtist
//

#import "NSDate+Custom.h"

@implementation NSDate (Custom)

+ (NSDate *)dateFromServerString:(NSString *)string {
    if (string == nil || string == (NSString *) [NSNull null] || string.length == 0)
        return nil;
    
    NSDateFormatter *dateformatter = [[NSDateFormatter alloc] init];
    [dateformatter setTimeZone:[NSTimeZone timeZoneWithAbbreviation:@"GMT"]];
    [dateformatter setDateFormat:DATE_FORMAT_SERVER];
    
    return [dateformatter dateFromString:string];
}

+ (NSString *)stringWithDate:(NSDate *) date withFormat:(NSString *)format {
    if (date == nil)
        return nil;
    
    NSDateFormatter *dateformatter = [[NSDateFormatter alloc] init];
    [dateformatter setTimeZone:[NSTimeZone localTimeZone]];
    [dateformatter setDateFormat:format];
    
    return [dateformatter stringFromDate:date];
}

@end