我正在尝试将数据传递到启动 API 调用的块中,但出现错误:
“只能在初始化程序中访问静态成员”
这可能吗?我的方法完全错误吗?
我也尝试将其切换postid
为静态,但不确定如何实际访问postid
该状态。
代码:
class ViewPost extends StatefulWidget {
int postid; // sent from previous screen
}
ViewPost(
{Key key,
this.postid
})
: super(key: key);
}
我需要访问postid的状态:
@override
_ViewPostState createState() => _ViewPostState();
}
class _ViewPostState extends State<ViewPost> {
final int postid; // somehow I'd need to access postid here
final PostBlog _PostBloc =
PostBloc(httpClient: http.Client(), postid: postid);
}
_ViewBlogState() {
_postBloc.dispatch(Fetch());
}
建造:
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.name),
backgroundColor: Colors.black,
automaticallyImplyLeading: true,
leading: IconButton(
icon: Icon(Icons.arrow_back),
onPressed: () onPressed: () => Navigator.pop(context, true),
),
),
body: new RefreshIndicator(
child: BlocProviderTree(
blocProviders: [
PostProvider<PostBloc>(bloc: _postBloc)
],
child: BlocBuilder(
bloc: _postBloc,
builder: (BuildContext context, PostState state) {
....
}