Flutter-出生日期计算年龄工具类

//转化年龄工具类
class AgeByBirthUtils {
  static String getAge(DateTime brt){
    int age = 0;
    DateTime dateTime = DateTime.now();
    if (dateTime.isBofore(brt)) { //出生日期晚于当前时间，无法计算
      return '出生日期不正确';
    }
    int yearNow = dateTime.year;  //当前年份
    int monthNow = dateTime.month;  //当前月份
    int dayOfMonthNow = dateTime.day; //当前日期
​
    int yearBirth = brt.year;
    int monthBirth = brt.month;
    int dayOfMonthBirth = brt.day;
    age = yearNow - yearBirth;   //计算整岁数
    if (monthNow <= monthBirth) {
      if (monthNow == monthBirth) {
        if (dayOfMonthNow < dayOfMonthBirth) age--;//当前日期在生日之前，年龄减一
      } else {
        age--;//当前月份在生日之前，年龄减一
      }
    }
    return age.toString();
  }
}

void main() {
  
  var d1 = DateTime.parse('2006-10-10 09:30:36'); 
​
 
    print(AgeByBirthUtils.getAge(d1));
​
}