导航栏代码，配置文件

ln_jq_app/lib/common/model/base_model.dart

@@ -0,0 +1,19 @@
+class BaseModel {
+  bool? success;
+  String? type;
+  String? url;
+
+  BaseModel({this.success, this.type, this.url});
+
+  factory BaseModel.fromJson(Map<String, dynamic> json) => BaseModel(
+        success: json['success']?.toString().contains("true"),
+        type: json['type']?.toString(),
+        url: json['url']?.toString(),
+      );
+
+  Map<String, dynamic> toJson() => {
+        if (success != null) 'success': success,
+        if (type != null) 'type': type,
+        if (url != null) 'url': url,
+      };
+}