如何从 json api 飞镖/颤振循环地图列表

Question

我创建了一个 class model 从 ZDB974238714CA8DE634A7CE1D083A14F 接收 json 数据

class Competition {
  int id;
  String name;
  String code;
  String type;
  String emblem;
  Competition({
    required this.id,
    required this.name,
    required this.code,
    required this.type,
    required this.emblem,
  });

  factory Competition.fromJson(Map<String, dynamic> data) {
    return Competition(
      id: data["matches"][0]["competition"]['id'],
      name: data["matches"][0]["competition"]['name'],
      code: data["matches"][0]["competition"]['code'],
      type: data["matches"][0]["competition"]['type'],
      emblem: data["matches"][0]["competition"]['emblem'],
    );
  }
}

代码正常工作，每次 index [0] 更改即将到来的数据更改为下一个比赛细节

我想自动更改此索引以一次获取所有数据，此索引表示列表数据[“matches”].length

我的 Api 服务看起来像

class ServiceApi {
      Future<Competition > getmatches() async {
        http.Response response = await http.get(
            Uri.parse('_url'),
            headers: {'X-Auth-Token': '_key'});
    String body = response.body;
    Map<String, dynamic> data = jsonDecode(body);
    Competition compitition = Competition.fromJson(data);
    int numberOfCompetition = data["matches"].length;
     return matches;
  }
}

Answer 1

你可以像这样 map

List<Competition> compititionList = data['matches'].map((item) => Competition.fromJson(item));
print(compittionList[0].name);

顺便说一句，比赛中有错字（拼写错误）（以防万一你想修复它）

并且 model 应该是

class Competition {
  int id;
  String name;
  String code;
  String type;
  String emblem;
  Competition({
    required this.id,
    required this.name,
    required this.code,
    required this.type,
    required this.emblem,
  });

  factory Competition.fromJson(Map<String, dynamic> data) {
    return Competition(
      id: data["competition"]['id'],
      name: data["competition"]['name'],
      code: data["competition"]['code'],
      type: data["competition"]['type'],
      emblem: data["competition"]['emblem'],
    );
  }
}