localJsonToModel<T> static method

Future<T?> localJsonToModel<T>(String assetPath, T fromJson(Map<String, dynamic>), { bool fromSandbox = false, })

定义一个通用的 JSON 数组解析为对象的方法

使用示例 void exampleUsage() async { WheelModel? model = await localJsonToModel

Implementation

static Future<T?> localJsonToModel<T>(
    String assetPath, T Function(Map<String, dynamic>) fromJson,
    {bool fromSandbox = false}) async {
  String response;
  if (fromSandbox) {
    final file = File(assetPath);
    if (!file.existsSync()) {
      return null;
    }
    response = await file.readAsString();
  } else {
    try {
      response = await rootBundle.loadString(assetPath);
    } catch (e) {
      return null;
    }
  }
  final data = json.decode(response);
  return fromJson(data);
}