什么是飞镖语言相当于时间跨度？

Question

在dart中使用什么数据类型而不是在TimeSpan中使用什么数据类型？

Answer 1

是持续时间。

例如：

void main(List<String> args) {
  // Define two dates.
  DateTime date1 = new DateTime(2010, 1, 1, 8, 0, 15);
  DateTime date2 = new DateTime(2010, 8, 18, 13, 30, 30);

  // Calculate the interval between the two dates.
  Duration interval = date2.difference(date1);
  print('$date2 - $date1 = $interval');

  // Display individual properties of the resulting TimeSpan object.
  print('Total Number of Days: ${interval.inDays}');
  print('Total Number of Hours: ${interval.inHours}');
  print('Total Number of Minutes: ${interval.inMinutes}');
  print('Total Number of Seconds: ${interval.inSeconds}');
  print('Total Number of Milliseconds: ${interval.inMilliseconds}');
}

其结果将是：

2010-08-18 13:30:30.000 - 2010-01-01 08:00:15.000 = 5501:30:15.000000
Total Number of Days: 229
Total Number of Hours: 5501
Total Number of Minutes: 330090
Total Number of Seconds: 19805415
Total Number of Milliseconds: 19805415000