获取当前日期

1.    //获取当前时间，日期

    NSDate *dateTime = [NSDate date];

    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];

    [dateFormatter setDateFormat:@"YYYY/MM/dd"];

    NSString *dateString = [dateFormatter stringFromDate:dateTime];

        NSLog(@"dateString:%@",dateString);

2.

    NSDate *date = [NSDate date];//这个是NSDate类型的日期，所要获取的年月日都放在这里；

    NSCalendar *cal = [NSCalendar currentCalendar];

    unsigned int unitFlags = NSCalendarUnitYear|NSCalendarUnitMonth| NSCalendarUnitDay;//这句是说你要获取日期的元素有哪些。获取年就要写NSYearCalendarUnit，获取小时就要写NSHourCalendarUnit，中间用|隔开；

    NSDateComponents *d = [cal components:unitFlags fromDate:date];//把要从date中获取的unitFlags标示的日期元素存放在NSDateComponents类型的d里面； //然后就可以从d中获取具体的年月日了；

    NSInteger year = [d year];

    NSInteger month = [d month];

    NSInteger day = [d day];

    NSLog(@"%ld",year);

    NSLog(@"%ld",month);

    NSLog(@"%ld",day);