class BaseModel { int? code; String? message; bool? status; dynamic? data; BaseModel({ this.code, this.message, this.data, this.status, }); BaseModel.err({this.message = '未知错误', this.status = false}); BaseModel.fromJson(Map json) { message = json['message'] ?? ''; data = json['data'] ?? null; status = json['status'] ?? false; } }