如何从返回的Map中提取所有值到列表?

Question

所以我有这个地图final Map<DateTime, List<CleanCalendarEvent>>? events;。我想根据DateTime从这个Map中获取一些项目，所以我这样做:

final recentSunday = DateTime(_selectedDate.year, _selectedDate.month,_selectedDate.day - _selectedDate.weekday % 7);
final nextSunday = DateTime(recentSunday.year, recentSunday.month, recentSunday.day + 7);
selectedCloseEvents = (widget.events?.firstWhereOrNull((date) =>
date.key.compareTo(recentSunday) > 0 &&
date.key.compareTo(nextSunday) < 0) ??
[])

这将以Map<DateTime, List<CleanCalendarEvent>>格式返回一周内的所有事件。我需要它作为List<CleanCalendarEvent>。

I have try:

_selectedCloseEvents = (widget.events?.firstWhereOrNull((date) =>
date.key.compareTo(recentSunday) > 0 &&
date.key.compareTo(nextSunday) < 0) ??
[])
.value as List<CleanCalendarEvent>?;

但它没有工作。如何从这个地图中只选择值?

Answer 1

根据文档，这应该会给您一个CleanCalenderEvent的列表:

_selectedCloseEvents = selectedCloseEvents.values.toList()