ios 获取当前时间

①  取自EGO
NSDate *date = [_delegate egoRefreshTableHeaderDataSourceLastUpdated:self];
[NSDateFormatter setDefaultFormatterBehavior:NSDateFormatterBehaviorDefault];
NSDateFormatter *dateFormatter = [[[NSDateFormatter alloc] init] autorelease];
[dateFormatter setDateStyle:NSDateFormatterShortStyle];
[dateFormatter setTimeStyle:NSDateFormatterShortStyle];
NSString* nowTime = [dateFormatter stringFromDate:date];


②

NSDate * now=[NSDate date];
NSLog(@"now Time:%@",now);
NSCalendar *calendar = [NSCalendar currentCalendar];
NSUInteger unitFlags = NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit | NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit;
NSDateComponents *dateComponent = [calendar components:unitFlags fromDate:now];
int hour = [dateComponent hour];
int minute = [dateComponent minute];
int second=[dateComponent second];
NSLog(@"%d %d %d",hour,minute,second);