Vickate_获取某年某月某天的具体值

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/// 用于只获取每个月当中的哪一号
- (NSInteger)getDay {
    //设置成中国阳历
    NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierGregorian];
    NSDateComponents *comps = [calendar components:NSCalendarUnitDay fromDate:[NSDate date]];
  //获取日期中的某一天
    NSInteger day = comps.day; 
    return day;
}

注意：
如果是想知道现在是几月可以把NSCalendarUnitDay改为NSCalendarUnitMouth即可，当然也可以全写为

NSDateComponents *comps = [calendar components:NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay | NSCalendarUnitWeekday | NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitSecond fromDate:[NSDate date]];

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