fix bug

lib/src/models/user_info.dart

@@ -0,0 +1,65 @@
+class UserInfo {
+  String uid;
+  String? name;
+  String? icon;
+  int? gender; // 0 未知，1 男，2 女
+  String? mobile;
+  String? birth;
+  String? email;
+  String? ex;
+  String? comment;
+  int? isInBlackList; // 0 不在黑名单，1 在黑名单
+  String? reqMessage;
+  String? applyTime;
+  int? flag; // //0请求添加好友，1同意添加好友，-1拒绝添加好友
+
+  UserInfo(
+      {required this.uid,
+      this.name,
+      this.icon,
+      this.gender,
+      this.mobile,
+      this.birth,
+      this.email,
+      this.ex,
+      this.comment,
+      this.isInBlackList,
+      this.reqMessage,
+      this.applyTime,
+      this.flag});
+
+  UserInfo.fromJson(Map<String, dynamic> json) : uid = json['uid'] {
+    name = json['name'];
+    icon = json['icon'];
+    gender = json['gender'];
+    mobile = json['mobile'];
+    birth = json['birth'];
+    email = json['email'];
+    ex = json['ex'];
+    comment = json['comment'];
+    isInBlackList = json['isInBlackList'];
+    reqMessage = json['reqMessage'];
+    applyTime = json['applyTime'];
+    flag = json['flag'];
+  }
+
+  Map<String, dynamic> toJson() {
+    final Map<String, dynamic> data = new Map<String, dynamic>();
+    data['uid'] = this.uid;
+    data['name'] = this.name;
+    data['icon'] = this.icon;
+    data['gender'] = this.gender;
+    data['mobile'] = this.mobile;
+    data['birth'] = this.birth;
+    data['email'] = this.email;
+    data['ex'] = this.ex;
+    data['comment'] = this.comment;
+    data['isInBlackList'] = this.isInBlackList;
+    data['reqMessage'] = this.reqMessage;
+    data['applyTime'] = this.applyTime;
+    data['flag'] = this.flag;
+    return data;
+  }
+
+  String get nickname => comment ?? name ?? uid;
+}