iOS时间的处理

• 时间---->时间戳

//时间---->时间戳 时间格式2017-06-09 10:00
+(NSString *)transTotimeSp:(NSString *)time{
   //设置转换格式
   NSDateFormatter *formatter = [[NSDateFormatter alloc] init] ;
   [formatter setDateFormat:@"yyyy-MM-dd HH:mm"];
   //NSString转NSDate
   NSDate *date=[formatter dateFromString:time];
   NSString *timeSp = [NSString stringWithFormat:@"%ld", (long)[date timeIntervalSince1970]];
   NSLog(@"时间戳%@",timeSp);
   return timeSp;
}

• 时间戳--->几月几日. 转化为时间格式MM月dd日

+(NSString *)transToDate:(NSString *)timsp{
   NSTimeInterval time=[timsp doubleValue];//如果不使用本地时区,因为时差问题要加8小时 == 28800 sec
   NSDate *detaildate=[NSDate dateWithTimeIntervalSince1970:time];
   //实例化一个NSDateFormatter对象
   NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
   [dateFormatter setTimeZone:[NSTimeZone localTimeZone]];//设置本地时区
   //设定时间格式,这里可以设置成自己需要的格式
   [dateFormatter setDateFormat:@"MM月dd日"];
   NSString *currentDateStr = [dateFormatter stringFromDate: detaildate];
   return currentDateStr;
}

• 时间戳--->时分日期 转化为时间格式10:00

+(NSString *)transToMinDate:(NSString *)timsp{
    NSTimeInterval time=[timsp doubleValue];//如果不使用本地时区,因为时差问题要加8小时 == 28800 sec
    NSDate *detaildate=[NSDate dateWithTimeIntervalSince1970:time];
    //实例化一个NSDateFormatter对象
    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    [dateFormatter setTimeZone:[NSTimeZone localTimeZone]];//设置本地时区
    //设定时间格式,这里可以设置成自己需要的格式
    [dateFormatter setDateFormat:@"HH:mm"];
    NSString *currentDateStr = [dateFormatter stringFromDate: detaildate];
    return currentDateStr;
}

• 时间戳--->传入开始时间加时长 转化为时间格式（01月，01日，10:00-12:00，星期一）

//时间戳--->月 日 时间。星期
+(void)transFormat:(NSNumber *)format hour:(NSNumber *)hour callBack:(void (^)(NSString *, NSString *, NSString *, NSString *))callback{
    NSTimeInterval time=[format doubleValue] ;//如果不使用本地时区,因为时差问题要加8小时 == 28800 sec
    NSDate *detaildate=[NSDate dateWithTimeIntervalSince1970:time];
    NSCalendar * calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierGregorian]; // 指定日历的算法 NSCalendarIdentifierGregorian,NSGregorianCalendar
    // NSDateComponent 可以获得日期的详细信息，即日期的组成
      NSString *weekStr=nil;
    NSDateComponents *comps = [calendar components:NSCalendarUnitYear|NSCalendarUnitMonth|NSCalendarUnitDay|NSCalendarUnitHour|NSCalendarUnitMinute|NSCalendarUnitSecond|NSCalendarUnitWeekOfYear|NSCalendarUnitWeekday fromDate:detaildate];
    
     NSDate *detaildate1=[NSDate dateWithTimeIntervalSince1970:(time + hour.intValue*60*60)];
    // NSDateComponent 可以获得日期的详细信息，即日期的组成
    NSDateComponents *comps1 = [calendar components:NSCalendarUnitYear|NSCalendarUnitMonth|NSCalendarUnitDay|NSCalendarUnitHour|NSCalendarUnitMinute|NSCalendarUnitSecond|NSCalendarUnitWeekOfYear|NSCalendarUnitWeekday fromDate:detaildate1];
    if(comps.weekday==1)
    {
        weekStr=@"星期日";
    }else if(comps.weekday==2){
        weekStr=@"星期一";
    }else if(comps.weekday==3){
        weekStr=@"星期二";
    }else if(comps.weekday==4){
        weekStr=@"星期三";
    }else if(comps.weekday==5){
        weekStr=@"星期四";
    }else if(comps.weekday==6){
        weekStr=@"星期五";
    }else if(comps.weekday==7){
        weekStr=@"星期六";
    }
     callback([NSString stringWithFormat:@"%02ld",comps.month],[NSString stringWithFormat:@"%02ld",comps.day],[NSString stringWithFormat:@"%02ld:%02ld-%02ld:%02ld",comps.hour,comps.minute,comps1.hour,comps1.minute],weekStr);
}

• 传入年月日，返回年龄 传入格式yyyy-MM-dd

+(int)getAgeWithBirthDay:(NSString *)birthDate{
    //首先把string类型的birth转为nsdate
    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    [dateFormatter setDateFormat:@"yyyy-MM-dd"];
    //出生日期
    NSDate *birth = [dateFormatter dateFromString:birthDate];
    //现在的日期
    NSString *currenDateStr = [dateFormatter stringFromDate:[NSDate date]];
    NSDate *today = [dateFormatter dateFromString:currenDateStr];
    
    //从出生到现在过去了多久
    NSTimeInterval time = [today timeIntervalSinceDate:birth];
    int age = ((int)time)/(3600*24*365);
    
    return age;
}

• 根据生日得到星座

+ (NSString *)getConstellationFromBirthday:(NSDate*)birthday{
 NSCalendar *myCal = [[NSCalendar alloc]initWithCalendarIdentifier:NSCalendarIdentifierGregorian];
    NSDateComponents *comp1 = [myCal components:NSCalendarUnitMonth| NSCalendarUnitDay fromDate:birthday];
    NSInteger month = [comp1 month];
    NSInteger day = [comp1 day];
    NSString *astroString = @"魔羯水瓶双鱼白羊金牛双子巨蟹狮子处女天秤天蝎射手魔羯";
    NSString *astroFormat = @"102123444543";
    NSString *result;
    if (month <1|| month>12|| day <1|| day>31){
        return @"错误日期格式!";
    }
    if(month ==2 && day>29)
    {
        return @"错误日期格式!!";
        
    }else if(month ==4 || month ==6 || month ==9 || month ==11) {
        
        if (day>30) {
            
            return @"错误日期格式!!!";
        }
    }
    result=[NSString stringWithFormat:@"%@",[astroString substringWithRange:NSMakeRange(m*2-(d < [[astroFormat substringWithRange:NSMakeRange((m-1), 1)] intValue] - (-19))*2,2)]];
    return [result stringByAppendingString:@"座"];
   }