當我決議我的 json 時，我得到了 FutureBuilder 快照錯誤：
“List”型別不是“FutureOr<List>”型別的子型別，是我的產品模型錯誤還是決議錯誤？
我的代碼
late Future<List<Product>> productFuture = getProducts();
static Future<List<Product>> getProducts() async {
var url = '${Constants.API_URL_DOMAIN}action=catalog&category_id=$id';
final response = await http.get(Uri.parse(url));
final body = jsonDecode(response.body);
print(body['data']);
return body['data'].map((e)=>Product.fromJson(e)).toList();
}
FutureBuilder<List<Product>>(
future: productFuture,
builder: (context, snapshot) {
print(snapshot);
if (snapshot.connectionState == ConnectionState.waiting) {
return Center(child: CircularProgressIndicator());
} else if (snapshot.hasData) {
final catalog = snapshot.data;
return buildCatalog(catalog!);
} else {
print('SNAPSOT DATA ${snapshot.data}');
return Text("No widget to build");
}
}),
uj5u.com熱心網友回復：
使用List.from
return List.from(body['data'].map((e)=>Product.fromJson(e)));
static Future<List<Product>> getProducts() async {
var url = '${Constants.API_URL_DOMAIN}action=catalog&category_id=$id';
final response = await http.get(Uri.parse(url));
final body = jsonDecode(response.body);
print(body['data']);
return List.from(body['data'].map((e)=>Product.fromJson(e)));
}
uj5u.com熱心網友回復：
嘗試全部轉換List<Product> --> List<dynamic>
轉載請註明出處，本文鏈接：https://www.uj5u.com/yidong/533172.html
標籤：扑镖类型