如何计算ios中的年龄？

我想以X年Y月Z日的形式计算年龄。这里是我的代码如何计算ios中的年龄？

NSString *dateString = @"15-Sep-1997"; 
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc]init]; 
[dateFormatter setDateFormat:@"dd-MMM-yyyy"]; 

NSDate *PrevDate = [dateFormatter dateFromString:dateString]; 


NSDate *today = [NSDate date]; 
NSLog(@"Prev date = %@", PrevDate); 
NSLog(@"today =%@", today); 
NSInteger years; 
NSInteger months; 
NSInteger days; 

NSCalendar *calendar = [NSCalendar currentCalendar]; 
unsigned unitFlags = NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit; 
NSDateComponents *dateComponentsNow = [calendar components:unitFlags fromDate:today]; 
NSDateComponents *dateComponentsBirth = [calendar components:unitFlags fromDate:PrevDate]; 

if (([dateComponentsNow month] < [dateComponentsBirth month]) || 
    (([dateComponentsNow month] == [dateComponentsBirth month]) && ([dateComponentsNow day] < [dateComponentsBirth day]))) { 
    years = [dateComponentsNow year] - [dateComponentsBirth year] - 1; 
} else { 
    years = [dateComponentsNow year] - [dateComponentsBirth year]; 
    months = [dateComponentsNow month] - [dateComponentsBirth month]; 
    days = [dateComponentsNow day] - [dateComponentsBirth day]; 
} 


NSLog(@"%d years %d months %d days", years, months, days);

输出变为：17岁2个月 - 9日（它抽出1个多月，并减去天）正确的输出：17年2本月22日天（截至今天的日期）

来源

2014-11-06 vishnu

只是看到 - > http://stackoverflow.com/questions/4463893/how-to-calculate-the-age-based-on-date – 2014-11-06 08:53:57

我已经尝试过，但没有得到确切的输出 – vishnu 2014-11-06 08:54:58

试试这个 - > http ：//stackoverflow.com/questions/19202120/how-to-compute-age-from-nsdate – 2014-11-06 08:59:03

查看下方代码。

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; 
[dateFormatter setDateFormat:@"dd-MMM-yyyy"]; 
NSDate *startD = [dateFormatter dateFromString:@"15-Sep-1997"]; 
NSDate *endD = [NSDate date]; 

NSCalendar *calendar = [NSCalendar currentCalendar]; 
NSUInteger unitFlags = NSCalendarUnitYear|NSCalendarUnitMonth|NSCalendarUnitDay|NSCalendarUnitHour|NSCalendarUnitMinute|NSCalendarUnitSecond; 
NSDateComponents *components = [calendar components:unitFlags fromDate:startD toDate:endD options:0]; 

NSInteger year = [components year]; 
NSInteger month = [components month]; 
NSInteger day = [components day]; 

NSLog(@"%ld:%ld:%ld", (long)year, (long)month,(long)day);

和输出

17：1：22

也许这会帮助你。

来源

2014-11-06 09:11:20

工作很好，非常感谢你。 – vishnu 2014-11-06 09:26:08

如何计算ios中的年龄？

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