获取当前时间字符串

- (NSString *)getCurrentDate

{

NSDateFormatter *formatter =[[[NSDateFormatteralloc] init] autorelease];

NSDate *date = [NSDate date];

[formatter setTimeStyle:NSDateFormatterMediumStyle];

NSCalendar *calendar = [[[NSCalendaralloc] initWithCalendarIdentifier:NSGregorianCalendar] autorelease];

NSDateComponents *comps = [[[NSDateComponentsalloc] init] autorelease];

[comps setTimeZone:[NSTimeZonetimeZoneWithName:@"Asia/Shanghai"]];

NSInteger unitFlags = NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit | NSWeekdayCalendarUnit | NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit;

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

int year=[comps year];

NSString *month = ([comps month] < 10)?[NSStringstringWithFormat:@"0%d",[comps month]]:[NSStringstringWithFormat:@"%d", [comps month]];

NSString *day = ([comps day] < 10)?[NSStringstringWithFormat:@"0%d",[comps day]]:[NSStringstringWithFormat:@"%d", [comps day]];

NSString *hour = ([comps hour] < 10)?[NSStringstringWithFormat:@"0%d",[comps hour]]:[NSStringstringWithFormat:@"%d", [comps hour]];

NSString *min = ([comps minute] < 10)?[NSStringstringWithFormat:@"0%d",[comps minute]]:[NSStringstringWithFormat:@"%d", [comps minute]];

NSString *sec = ([comps second] < 10)?[NSStringstringWithFormat:@"0%d",[comps second]]:[NSStringstringWithFormat:@"%d", [comps second]];

NSString *curDate = [[[NSString alloc] initWithFormat:@"%d%@%@%@%@%@", year, month, day, hour, min, sec] autorelease];

return curDate;

}