我有一个简单的代码段：
class CreateNewViewPage extends StatefulWidget {
final ComponentConfiguration currentComponentConfiguration = ComponentConfiguration(1, 1);
final Components components = Components(currentComponentConfiguration);
@override
State<StatefulWidget> createState() => _CreateNewViewPage();
}
不幸的是，当我想发送currentComponentConfiguration到Components类构造时，我得到以下信息：The instance member 'currentComponentConfiguration' can't be accessed in an initializer.
我该如何解决这个问题？
您不能使用非静态变量来初始化另一个非静态变量。要么使currentComponentConfiguration静态成员或做components在创建对象State类（_CreateNewViewPageState）。
使用静态
class CreateNewViewPage extends StatefulWidget {
static final ComponentConfiguration currentComponentConfiguration = ComponentConfiguration(1, 1);
final Components components = Components(currentComponentConfiguration);
@override
_CreateNewViewPageState createState() => _CreateNewViewPageState();
}
使用状态类
class CreateNewViewPage extends StatefulWidget {
final ComponentConfiguration currentComponentConfiguration = ComponentConfiguration(1, 1);
@override
_CreateNewViewPageState createState() => _CreateNewViewPageState();
}
class _CreateNewViewPageState extends State<CreateNewViewPage> {
Components components;
@override
void initState() {
super.initState();
components = Components(widget.currentComponentConfiguration);
}
@override
Widget build(BuildContext context) {
return Text('Hello, World!', style: Theme.of(context).textTheme.headline4);
}
}
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