IOS對時間的操作大全 待更新

iPhone：NSData年、月、星期、日、時、分、秒擷取及NSDataToNSString方法 

在 NSDate中獲得時間資訊，年、月、星期、日、時、分和秒：

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

NSDate *now;

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

NSInteger unitFlags = NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit | NSWeekdayCalendarUnit |

NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit;

now=[NSDate date];

comps = [calendar components:unitFlags fromDate:now];

int year=[comps year];

int week = [comps weekday];   

int month = [comps month];

int day = [comps day];

int hour = [comps hour];

int min = [comps minute];

int sec = [comps second];

 

NSDataToNSString方法：

 

-(NSString *)NSDateToNSTring:(NSDate *)nsDate{

//NSString *string = [nsDate descriptionWithCalendarFormat:@"%Y/%m/%d %H:%M:%S" timeZone:nil locale:nil];此方法為是有API如果要上傳APP不要使用

NSDateFormatter *fmt = [[[NSDateFormatter alloc] init] autorelease];

[fmt setDateFormat:@"yyyy/MM/dd hh:mm:ss"];

NSString *string=[fmt stringFromDate:nsDate];

return string;

}