// NSDate *birthDate から現在までの年の差を求める(年齢を求める) NSCalendar *calendar = [NSCalendar currentCalendar]; NSDateComponents *diffComponents = [calendar components:NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit fromDate:birthDate toDate:[NSDate date] options:0]; NSInteger year = [diffComponents year]; NSLog(@"year:%d", year);
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