Question

如何在抖动/飞镖中创建时隙？

我想从给定的开始时间和结束时间开始列出30分钟的时隙。

示例：开始时间9:00 AM 结束时间是10:00 PM 列表将是

-c

有没有图书馆可以解决这个问题？

Answer 1

您可以使用生成器来创建它，尽管语法有点难看，因为Flutter添加的TimeOfDay类不是很强大：

Iterable<TimeOfDay> getTimes(TimeOfDay startTime, TimeOfDay endTime, Duration step) sync* {
  var hour = startTime.hour;
  var minute = startTime.minute;

  do {
    yield TimeOfDay(hour: hour, minute: minute);
    minute += step.inMinutes;
    while (minute >= 60) {
      minute -= 60;
      hour++;
    }
  } while (hour < endTime.hour ||
           (hour == endTime.hour && minute <= endTime.minute));
}

用法：

final startTime = TimeOfDay(hour: 9, minute: 0);
final endTime = TimeOfDay(hour: 22, minute: 0);
final step = Duration(minutes: 30);

final times = getTimes(startTime, endTime, step)
                .map((tod) => tod.format(context))
                .toList();

print(times);

// Results:
// [9:00 AM, 9:30 AM, 10:00 AM, 10:30 AM, 11:00 AM, 11:30 AM, 12:00 PM, 12:30 PM, 1:00 PM, 1:30 PM, 2:00 PM, 2:30 PM, 3:00 PM, 3:30 PM, 4:00 PM, 4:30 PM, 5:00 PM, 5:30 PM, 6:00 PM, 6:30 PM, 7:00 PM, 7:30 PM, 8:00 PM, 8:30 PM, 9:00 PM, 9:30 PM, 10:00 PM]

Answer 2

创建一个长度为的列表： List.generate

List<String>.generate(3, (int index) => "time ${index + 1}"); 
// ["time 1", "time 2", "time 3"]

如何在飞镖/飞镖中创建30分钟的时隙

2 个答案: