你需要做这样的事情:
//...
Future<List<ItemModel>> fetchFood() async {
List<ItemModel> foodItemsList = [];
// Get json response and parse it as a Map<String, dynamic>
final response = {
"data" : {
"apple":{"qty":5, "price":100},
"orange":{"qty":2, "price":40},
}
};
// with your real get request use this:
// final parsedJson = json.decode(response.body)['data'];
// Parsed Json have what's inside data, in case of real request look for the line above this.
final parsedJson = response['data'];
// Iterate over all fruits and create Item object from each,
// then push to a list of Item's objects to return it.
parsedJson.forEach((k,v) => foodItemsList.add(ItemModel.fromJson(v)));
return foodItemsList;
}
// Item model
class ItemModel {
int qty;
int price;
ItemModel.fromJson(Map<String,dynamic> parsedJson)
: qty = parsedJson['qty'],
price = parsedJson['price'];
}
// Then call it
main() async {
List<ItemModel> foodItemsList = await fetchFood();
//..
}
如果您需要水果名称作为对象的一部分:
//...
Future<List<ItemModel>> fetchFood() async {
List<ItemModel> foodItemsList = [];
// Get json response and parse it as a Map<String, dynamic>
final response = {
"data" : {
"apple":{"qty":5, "price":100},
"orange":{"qty":2, "price":40},
}
};
// with your real get request use this:
// final parsedJson = json.decode(response.body)['data'];
// Parsed Json have what's inside data, in case of real request look for the line above this.
final parsedJson = response['data'];
// Iterate over all fruits and create Item object from each,
// then push to a list of Item's objects to return it.
parsedJson.forEach((fruitName, fruitDetails)
=> foodItemsList.add(
ItemModel.fromJson(fruitName, fruitDetails)
)
);
return foodItemsList;
}
// Item model
class ItemModel {
String name;
int qty;
int price;
ItemModel.fromJson(String fruitName, Map<String,dynamic> parsedJson)
: name = fruitName,
qty = parsedJson['qty'],
price = parsedJson['price'];
}
// Then call it
main() async {
List<ItemModel> foodItemsList = await fetchFood();
print(foodItemsList[1].name); //orange
//..
}