flutter - setter/getter 导致最大调用堆栈大小超出抖动

Question

我有以下小部件:

class VennDiagramWidget extends StatefulWidget {
  VennDiagramWidget(selectedGeneLists);

  List<GenesListObjIndexed> get selectedGeneLists => this.selectedGeneLists;

  @override
  _VennState createState() => _VennState();
}

class _VennState extends State<VennDiagramWidget> {

  List<GenesListObjIndexed> _selectedGeneLists;

  @override
  initState() {
    _selectedGeneLists = widget.selectedGeneLists;
  }

此窗口小部件通过以下方式由另一个窗口小部件初始化:

.
.
.
Navigator.of(context).push(MaterialPageRoute(
                  builder: (context) => VennDiagramWidget(selectedGeneLists)));

我在这行上收到Maximum call stack size exceeded的错误:_selectedGeneLists = widget.selectedGeneLists;内的initState。
据我所知，该代码应该使用我在第二个片段中指定的VennDiagramWidget构造类selectedGeneLists，并且当我调用此类的getter时，我应该获得完全相同的变量。
我究竟做错了什么？

Answer 1

问题是，当您调用getter selectedGeneLists时，它再次调用了自己

//                       calling itself ⬇
get selectedGeneLists => this.selectedGeneLists;

您需要在小部件类中声明selectedGeneLists变量
这应该工作

class VennDiagramWidget extends StatefulWidget {
  final selectedGeneLists;
  VennDiagramWidget(this.selectedGeneLists);

  @override
  _VennState createState() => _VennState();
}

或者如果您想要变量private

class VennDiagramWidget extends StatefulWidget {
  final _selectedGeneLists;
  VennDiagramWidget(this._selectedGeneLists);

  List<GenesListObjIndexed> get selectedGeneLists => this._selectedGeneLists;

  @override
  _VennState createState() => _VennState();
}