尋找iphone編程的時間

Question

我需要找到我的iphone應用程序的當前時間。我需要把它分解成不同的單位，所以我需要不同變量的小時，分​​鍾和秒。請幫忙！

Answer 1

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; 
[dateFormatter setDateFormat:@"HH"]; 
int hour = [[dateFormatter stringFromDate:[NSDate date]] intValue]; 
[dateFormatter setDateFormat:@"mm"]; 
int minute = [[dateFormatter stringFromDate:[NSDate date]] intValue]; 
[dateFormatter setDateFormat:@"ss"]; 
int second = [[dateFormatter stringFromDate:[NSDate date]] intValue]; 
[dateFormatter release]; 

Answer 2

NSDate *date = [NSDate date]; 
NSDateComponents *dateComponents = [calendar components:unitFlags fromDate:date]; 

NSInteger year = [dateComponents year]; 
NSInteger month = [dateComponents month]; 
NSInteger day = [dateComponents day]; 
NSInteger hour = [dateComponents hour]; 
NSInteger minute = [dateComponents minute]; 
NSInteger second = [dateComponents second]; 

[calendar release]; 

Answer 3

NSDate   *date   = [NSDate date]; 
NSCalendar  *calendar  = [NSCalendar currentCalendar]; 
NSCalendarUnit unitFlags  = NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit; 
NSDateComponents *dateComponents = [calendar components:unitFlags fromDate:date]; 

NSInteger hour = [dateComponents hour]; 
NSInteger minute = [dateComponents minute]; 
NSInteger second = [dateComponents second]; 

NSLog(@"%ld:%ld:%ld", hour, minute, second); 

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