如何获得Flutter 的时差

我以前创建了一个function来计算一个项目的时间差，你可以利用这个函数.只需通过传递您想要与当前计时进行比较的DateTime字符串来调用它:

String getComparedTime(String dateTime) {
    Duration difference = DateTime.now().difference(DateTime.parse(dateTime));
    final List prefix = [
      "just now",
      "second(s) ago",
      "minute(s) ago",
      "hour(s) ago",
      "day(s) ago",
      "month(s) ago",
      "year(s) ago"
    ];
    if (difference.inDays == 0) {
      if (difference.inMinutes == 0) {
        if (difference.inSeconds < 20) {
          return (prefix[0]);
        } else {
          return ("${difference.inSeconds} ${prefix[1]}");
        }
      } else {
        if (difference.inMinutes > 59) {
          return ("${(difference.inMinutes / 60).floor()} ${prefix[3]}");
        } else {
          return ("${difference.inMinutes} ${prefix[2]}");
        }
      }
    } else {
      if (difference.inDays > 30) {
        if (((difference.inDays) / 30).floor() > 12) {
          return ("${((difference.inDays / 30) / 12).floor()} ${prefix[6]}");
        } else {
          return ("${(difference.inDays / 30).floor()} ${prefix[5]}");
        }
      } else {
        return ("${difference.inDays} ${prefix[4]}");
      }
    }
  }