List 在 dart 中初始化之前无法访问对象

Question

我创建了一个房屋对象以在名为 'favHouses' 的列表中添加成员。但是飞镖不允许我在构造函数中初始化之前添加这些成员。这是我的代码和我得到的错误。

List<House> favHouses = [houseAlanya];
House houseAlanya = new House(..); 

我得到的错误：

The instance member 'houseAlanya' can't be accessed in an initializer. Try replacing the reference to the instance member with a different expression dart(implicit_this_reference_in_initializer)

Answer 1

在 Dart 2.12 中，您可以使用 late 关键字进行延迟初始化。

late List<House> favHouses = [houseAlanya];