Getting this error - type 'Future<dynamic>' is not a subtype of type 'List<dynamic>'

问题

Whenever trying to call future data and trying converting to List, it returns the error

type 'Future' is not a subtype of type 'List'

Tried type-casting, but no help

On HomePage.dart

final getPost = NetworkFile().getPosts();
  List posts;

  void getPostsList() {
    setState(() {
      var res = getPost;
      posts = res as List<dynamic>;
      print(posts);
    });
  } 

On Network.dart

class NetworkFile{

Future<dynamic> getPosts() async {
    var response = await http.get('$kBlogURL' + 'posts?_embed');
    Iterable resBody = await jsonDecode(response.body.toString());
    return resBody;
  }
} 

回答1:

You are decoding the response and its a List of type dynamic. There are few method to handle it. You can create a simple PODO class and cast/mapped to it. Or just do like below:

List posts = [];

void getPostsList() async {
  final fetchedPosts = await NetworkFile().getPosts();
  setState(() {
    posts = fetchedPosts;
  });
  print(posts);
}

Here is a nice article about PODO.

回答2:

final getPost = NetworkFile().getPosts();
Map posts;

void getPostsList() async {
  var res = await getPost;
  setState(() {
    posts = res as Map<String, dynamic>;
    print(posts);
  });
}


class NetworkFile {
  Future<dynamic> getPosts() async {
    var response = await http.get('https://onetechstop.net/wp-json/wp/v2');
    var resBody = await jsonDecode(response.body.toString());
    return resBody;
  }
}

来源：https://stackoverflow.com/questions/57791206/getting-this-error-type-futuredynamic-is-not-a-subtype-of-type-listdynam