Добавить 3 часа в час NSDate

Question

Я хочу добавить 3 часа в мою текущую дату. Я использую следующий код для добавления часов, но он добавляет 6 часов к текущей дате.

NSDate *n = [NSDate date]; 
int daysToAdd = 3; // or 60 :-) 

// set up date components 
NSDateComponents *components1 = [[[NSDateComponents alloc] init] autorelease]; 
[components1 setHour:daysToAdd]; 

// create a calendar 
NSCalendar *gregorian12 = [NSCalendar currentCalendar]; 

NSDate *newDate2 = [gregorian12 dateByAddingComponents:components toDate:n options:0]; 
NSLog(@"Clean: %@", newDate2); 

Результат: -

2013-09-10 12:25:24.752 project[1554:c07] Clean: 2013-09-10 06:55:15 +0000 

Answer 1

Попробуйте

NSString *strCurrentDate; 
NSString *strNewDate; 
NSDate *date = [NSDate date]; 
NSDateFormatter *df =[[NSDateFormatter alloc]init]; 
[df setDateStyle:NSDateFormatterMediumStyle]; 
[df setTimeStyle:NSDateFormatterMediumStyle]; 
strCurrentDate = [df stringFromDate:date]; 
NSLog(@"Current Date and Time: %@",strCurrentDate); 
int hoursToAdd = 3; 
NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar]; 
NSDateComponents *components = [[NSDateComponents alloc] init]; 
[components setHour:hoursToAdd]; 
NSDate *newDate= [calendar dateByAddingComponents:components toDate:date options:0]; 
[df setDateStyle:NSDateFormatterMediumStyle]; 
[df setTimeStyle:NSDateFormatterMediumStyle]; 
strNewDate = [df stringFromDate:newDate]; 
NSLog(@"New Date and Time: %@",strNewDate); 

Выход

Current Date and Time: Sep 10, 2013, 1:15:41 PM 
    New Date and Time: Sep 10, 2013, 4:15:41 PM 

Answer 2

NSDate *newDate = [oldDate dateByAddingTimeInterval:hrs*60*60]; 

Answer 3

NSDate *CurrentTimedate = [NSDate date];  
NSLog(@"%@",CurrentTimedate); 
NSDate *newDate = [CurrentTimedate dateByAddingTimeInterval:60*60*3]; 
NSLog(@"%@",newDate);