diff --git a/lib/model/community/activity_people_model.dart b/lib/model/community/activity_people_model.dart
index fab70a62..5c00fcd4 100644
--- a/lib/model/community/activity_people_model.dart
+++ b/lib/model/community/activity_people_model.dart
@@ -1,8 +1,10 @@
+import 'package:akuCommunity/model/common/img_model.dart';
+
 class ActivityPeopleModel {
   int id;
   String name;
   String tel;
-  List<ImgUrl> imgUrl;
+  List<ImgModel> imgUrl;
 
   ActivityPeopleModel({this.id, this.name, this.tel, this.imgUrl});
 
@@ -13,7 +15,7 @@ class ActivityPeopleModel {
     if (json['imgUrl'] != null) {
       imgUrl = [];
       json['imgUrl'].forEach((v) {
-        imgUrl.add(new ImgUrl.fromJson(v));
+        imgUrl.add(new ImgModel.fromJson(v));
       });
     }
   }
@@ -29,31 +31,3 @@ class ActivityPeopleModel {
     return data;
   }
 }
-
-class ImgUrl {
-  String url;
-  String size;
-  int longs;
-  int paragraph;
-  int sort;
-
-  ImgUrl({this.url, this.size, this.longs, this.paragraph, this.sort});
-
-  ImgUrl.fromJson(Map<String, dynamic> json) {
-    url = json['url'];
-    size = json['size'];
-    longs = json['longs'];
-    paragraph = json['paragraph'];
-    sort = json['sort'];
-  }
-
-  Map<String, dynamic> toJson() {
-    final Map<String, dynamic> data = new Map<String, dynamic>();
-    data['url'] = this.url;
-    data['size'] = this.size;
-    data['longs'] = this.longs;
-    data['paragraph'] = this.paragraph;
-    data['sort'] = this.sort;
-    return data;
-  }
-}
diff --git a/lib/model/community/community_topic_model.dart b/lib/model/community/community_topic_model.dart
index 20bb9d49..63e4a80b 100644
--- a/lib/model/community/community_topic_model.dart
+++ b/lib/model/community/community_topic_model.dart
@@ -8,13 +8,6 @@ class CommunityTopicModel {
   List<ImgModel> imgUrl;
   int activityNum;
 
-  String get firstImg {
-    if (imgUrl.isEmpty)
-      return '';
-    else
-      return imgUrl.first.url;
-  }
-
   CommunityTopicModel(
       {this.id,
       this.title,
diff --git a/lib/model/community/my_event_item_model.dart b/lib/model/community/my_event_item_model.dart
index 4bd44231..b123cebf 100644
--- a/lib/model/community/my_event_item_model.dart
+++ b/lib/model/community/my_event_item_model.dart
@@ -8,12 +8,6 @@ class MyEventItemModel {
   List<ImgModel> imgUrl;
   String createDate;
 
-  String get firstImg {
-    String img = '';
-    if (imgUrl.isNotEmpty) img = imgUrl.first.url;
-    return img;
-  }
-
   DateTime get date => DateUtil.getDateTime(createDate);
 
   MyEventItemModel({this.id, this.content, this.imgUrl, this.createDate});
diff --git a/lib/model/manager/questionnaire_detail_model.dart b/lib/model/manager/questionnaire_detail_model.dart
index 49ca5f7c..e2f0114b 100644
--- a/lib/model/manager/questionnaire_detail_model.dart
+++ b/lib/model/manager/questionnaire_detail_model.dart
@@ -1,3 +1,5 @@
+import 'package:akuCommunity/model/common/img_model.dart';
+
 class QuestionnaireDetialModel {
   int id;
   String title;
@@ -5,7 +7,7 @@ class QuestionnaireDetialModel {
   String beginDate;
   String endDate;
   List<QuestionnaireTopicVoList> questionnaireTopicVoList;
-  List<VoResourcesImgList> voResourcesImgList;
+  List<ImgModel> voResourcesImgList;
 
   QuestionnaireDetialModel(
       {this.id,
@@ -31,7 +33,7 @@ class QuestionnaireDetialModel {
     if (json['voResourcesImgList'] != null) {
       voResourcesImgList = [];
       json['voResourcesImgList'].forEach((v) {
-        voResourcesImgList.add(new VoResourcesImgList.fromJson(v));
+        voResourcesImgList.add(new ImgModel.fromJson(v));
       });
     } else
       voResourcesImgList = [];
@@ -115,31 +117,3 @@ class QuestionnaireChoiceVoList {
   }
 }
 
-class VoResourcesImgList {
-  String url;
-  String size;
-  int longs;
-  int paragraph;
-  int sort;
-
-  VoResourcesImgList(
-      {this.url, this.size, this.longs, this.paragraph, this.sort});
-
-  VoResourcesImgList.fromJson(Map<String, dynamic> json) {
-    url = json['url'];
-    size = json['size'];
-    longs = json['longs'];
-    paragraph = json['paragraph'];
-    sort = json['sort'];
-  }
-
-  Map<String, dynamic> toJson() {
-    final Map<String, dynamic> data = new Map<String, dynamic>();
-    data['url'] = this.url;
-    data['size'] = this.size;
-    data['longs'] = this.longs;
-    data['paragraph'] = this.paragraph;
-    data['sort'] = this.sort;
-    return data;
-  }
-}
diff --git a/lib/model/manager/voting_detail_model.dart b/lib/model/manager/voting_detail_model.dart
index 3e335877..c7000599 100644
--- a/lib/model/manager/voting_detail_model.dart
+++ b/lib/model/manager/voting_detail_model.dart
@@ -9,12 +9,6 @@ class VotingDetailModel {
   List<ImgModel> imgUrls;
   List<AppVoteCandidateVos> appVoteCandidateVos;
 
-  String get firstImage {
-    if (imgUrls == null) return '';
-    if (imgUrls.isEmpty) return '';
-    return imgUrls.first.url ?? '';
-  }
-
   VotingDetailModel(
       {this.id,
       this.title,
diff --git a/lib/model/user/committee_item_model.dart b/lib/model/user/committee_item_model.dart
index 08e7f6e1..3790682b 100644
--- a/lib/model/user/committee_item_model.dart
+++ b/lib/model/user/committee_item_model.dart
@@ -14,10 +14,6 @@ class CommitteeItemModel {
   int estateNo;
   List<ImgModel> imgUrls;
 
-  String get firstImg {
-    if (imgUrls.isEmpty) return '';
-    return imgUrls.first.url;
-  }
 
   String get sexValue {
     if (sexId == 0 || sexId == null) return '未设置';
diff --git a/lib/pages/event_activity/event_voting_page.dart b/lib/pages/event_activity/event_voting_page.dart
index df156223..9d420274 100644
--- a/lib/pages/event_activity/event_voting_page.dart
+++ b/lib/pages/event_activity/event_voting_page.dart
@@ -1,3 +1,4 @@
+import 'package:akuCommunity/model/common/img_model.dart';
 import 'package:flutter/material.dart';
 
 import 'package:flutter_easyrefresh/easy_refresh.dart';
@@ -60,8 +61,7 @@ class _EventVotingPageState extends State<EventVotingPage> {
             child: ClipRect(
               child: FadeInImage.assetNetwork(
                 placeholder: R.ASSETS_IMAGES_PLACEHOLDER_WEBP,
-                image: API.image(
-                    model.imgUrls.isNotEmpty ? model.imgUrls.first.url : ''),
+                image: API.image(ImgModel.first(model.imgUrls)),
                 fit: BoxFit.cover,
               ),
             ),
diff --git a/lib/pages/event_activity/voting_detail_page.dart b/lib/pages/event_activity/voting_detail_page.dart
index 6fe8a720..0c28e7f1 100644
--- a/lib/pages/event_activity/voting_detail_page.dart
+++ b/lib/pages/event_activity/voting_detail_page.dart
@@ -233,7 +233,7 @@ class _VotingDetailPageState extends State<VotingDetailPage> {
                     borderRadius: BorderRadius.circular(8.w),
                     child: FadeInImage.assetNetwork(
                       placeholder: R.ASSETS_IMAGES_PLACEHOLDER_WEBP,
-                      image: API.image(_model.firstImage),
+                      image: API.image(ImgModel.first(_model.imgUrls)),
                     ),
                   ),
                   44.w.heightBox,
diff --git a/lib/pages/goods_manage_page/goods_manage_page.dart b/lib/pages/goods_manage_page/goods_manage_page.dart
index c9c6c997..393d6a8b 100644
--- a/lib/pages/goods_manage_page/goods_manage_page.dart
+++ b/lib/pages/goods_manage_page/goods_manage_page.dart
@@ -1,3 +1,4 @@
+import 'package:akuCommunity/model/common/img_model.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 
@@ -22,7 +23,7 @@ class GoodsManagePage extends StatefulWidget {
 }
 
 class _GoodsManagePageState extends State<GoodsManagePage> {
-  EasyRefreshController _easyRefreshController;
+  EasyRefreshController _easyRefreshController = EasyRefreshController();
 
   Container _goodsCard(ArticleBorrowModel model) {
     return Container(
@@ -50,10 +51,11 @@ class _GoodsManagePageState extends State<GoodsManagePage> {
             width: 160.w,
             margin: EdgeInsets.only(right: 20.w),
             child: ClipRRect(
-                child: FadeInImage.assetNetwork(
-                    placeholder: R.ASSETS_IMAGES_PLACEHOLDER_WEBP,
-                    image: API.image(
-                        model.imgUrls.isEmpty ? '' : model.imgUrls.first.url))),
+              child: FadeInImage.assetNetwork(
+                placeholder: R.ASSETS_IMAGES_PLACEHOLDER_WEBP,
+                image: API.image(ImgModel.first(model.imgUrls)),
+              ),
+            ),
           ),
           Column(
             crossAxisAlignment: CrossAxisAlignment.start,
diff --git a/lib/pages/industry_committee/industry_committee_page.dart b/lib/pages/industry_committee/industry_committee_page.dart
index a99ff700..055e7c6a 100644
--- a/lib/pages/industry_committee/industry_committee_page.dart
+++ b/lib/pages/industry_committee/industry_committee_page.dart
@@ -1,3 +1,4 @@
+import 'package:akuCommunity/model/common/img_model.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 
@@ -80,7 +81,7 @@ class _IndustryCommitteePageState extends State<IndustryCommitteePage> {
             borderRadius: BorderRadius.circular(4.w),
             child: FadeInImage.assetNetwork(
               placeholder: R.ASSETS_IMAGES_PLACEHOLDER_WEBP,
-              image: API.image(model.firstImg),
+              image: API.image(ImgModel.first(model.imgUrls)),
               height: 150.w,
               width: 150.w,
               fit: BoxFit.cover,
diff --git a/lib/pages/things_page/widget/fixed_detail_page.dart b/lib/pages/things_page/widget/fixed_detail_page.dart
index 1cd2b95f..263d729c 100644
--- a/lib/pages/things_page/widget/fixed_detail_page.dart
+++ b/lib/pages/things_page/widget/fixed_detail_page.dart
@@ -38,7 +38,7 @@ class CancelModel {
 
 class _FixedDetailPageState extends State<FixedDetailPage> {
   bool _onLoading = true;
-  EasyRefreshController _easyRefreshController;
+  EasyRefreshController _easyRefreshController = EasyRefreshController();
   FixedDetailModel _model = FixedDetailModel();
   bool get showRepairCard => _model?.appDispatchListVo != null;
   bool get showProcessCard => _model.appProcessRecordVo.isNotEmpty;
diff --git a/lib/ui/community/activity/activity_card.dart b/lib/ui/community/activity/activity_card.dart
index c9cd443d..31cf2b01 100644
--- a/lib/ui/community/activity/activity_card.dart
+++ b/lib/ui/community/activity/activity_card.dart
@@ -1,3 +1,4 @@
+import 'package:akuCommunity/model/common/img_model.dart';
 import 'package:flutter/material.dart';
 
 import 'package:flustars/flustars.dart';
@@ -18,8 +19,6 @@ class ActivityCard extends StatelessWidget {
     @required this.model,
   }) : super(key: key);
 
-  String get firstPath =>
-      (model.imgUrls?.isEmpty ?? true) ? null : model.imgUrls.first.url;
   bool get outdate => model.end.compareTo(DateTime.now()) == -1;
   Widget build(BuildContext context) {
     return MaterialButton(
@@ -38,15 +37,15 @@ class ActivityCard extends StatelessWidget {
       child: Column(
         crossAxisAlignment: CrossAxisAlignment.start,
         children: [
-          firstPath == null
+          ImgModel.first(model.imgUrls) == null
               ? SizedBox()
               : Hero(
-                  tag: firstPath,
+                  tag: ImgModel.first(model.imgUrls),
                   child: Material(
                     color: Colors.grey,
                     child: FadeInImage.assetNetwork(
                       placeholder: R.ASSETS_IMAGES_PLACEHOLDER_WEBP,
-                      image: API.image(firstPath),
+                      image: API.image(ImgModel.first(model.imgUrls)),
                       height: 210.w,
                       width: double.infinity,
                       fit: BoxFit.cover,
diff --git a/lib/ui/community/activity/activity_people_list_page.dart b/lib/ui/community/activity/activity_people_list_page.dart
index 2e19e7d2..b59ee58a 100644
--- a/lib/ui/community/activity/activity_people_list_page.dart
+++ b/lib/ui/community/activity/activity_people_list_page.dart
@@ -1,3 +1,4 @@
+import 'package:akuCommunity/model/common/img_model.dart';
 import 'package:flutter/material.dart';
 
 import 'package:flutter_easyrefresh/easy_refresh.dart';
@@ -47,7 +48,7 @@ class _ActivityPeopleListPageState extends State<ActivityPeopleListPage> {
                   20.wb,
                   FadeInImage.assetNetwork(
                     placeholder: R.ASSETS_IMAGES_PLACEHOLDER_WEBP,
-                    image: API.image(model.imgUrl.first.url),
+                    image: API.image(ImgModel.first(model.imgUrl)),
                     height: 60.w,
                     width: 60.w,
                   ),
diff --git a/lib/ui/community/community_views/topic/topic_community_view.dart b/lib/ui/community/community_views/topic/topic_community_view.dart
index bd3fbb8e..8049c61c 100644
--- a/lib/ui/community/community_views/topic/topic_community_view.dart
+++ b/lib/ui/community/community_views/topic/topic_community_view.dart
@@ -1,5 +1,6 @@
 import 'dart:ui';
 
+import 'package:akuCommunity/model/common/img_model.dart';
 import 'package:flutter/material.dart';
 
 import 'package:flutter_easyrefresh/easy_refresh.dart';
@@ -47,7 +48,7 @@ class TopicCommunityViewState extends State<TopicCommunityView>
                 children: [
                   FadeInImage.assetNetwork(
                     placeholder: R.ASSETS_IMAGES_PLACEHOLDER_WEBP,
-                    image: API.image(model.firstImg),
+                    image: API.image(ImgModel.first(model.imgUrl)),
                     height: 160.w,
                     width: 250.w,
                     fit: BoxFit.cover,
diff --git a/lib/ui/community/community_views/topic/topic_detail_page.dart b/lib/ui/community/community_views/topic/topic_detail_page.dart
index 0e55e1d4..df5f02ef 100644
--- a/lib/ui/community/community_views/topic/topic_detail_page.dart
+++ b/lib/ui/community/community_views/topic/topic_detail_page.dart
@@ -1,3 +1,4 @@
+import 'package:akuCommunity/model/common/img_model.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 
@@ -63,7 +64,7 @@ class _TopicDetailPageState extends State<TopicDetailPage> {
                   delegate: TopicSliverHeader(
                     id: widget.model.id,
                     title: widget.model.summary,
-                    imgPath: widget.model.firstImg,
+                    imgPath: ImgModel.first(widget.model.imgUrl),
                     subTitle: widget.model.content,
                   ),
                   pinned: true,
diff --git a/lib/ui/community/community_views/widgets/chat_card.dart b/lib/ui/community/community_views/widgets/chat_card.dart
index be0c833a..f63616f5 100644
--- a/lib/ui/community/community_views/widgets/chat_card.dart
+++ b/lib/ui/community/community_views/widgets/chat_card.dart
@@ -47,14 +47,6 @@ class _ChatCardState extends State<ChatCard> {
     return (userProvider?.userInfoModel?.id ?? -1) == widget.model.createId;
   }
 
-  String get firstHead {
-    if (widget.model.headSculptureImgUrl == null ||
-        widget.model.headSculptureImgUrl.isEmpty)
-      return '';
-    else
-      return widget.model.headSculptureImgUrl.first.url;
-  }
-
   _renderImage() {
     if (widget.model.imgUrls.isEmpty) return SizedBox();
     if (widget.model.imgUrls.length == 1)
@@ -78,10 +70,10 @@ class _ChatCardState extends State<ChatCard> {
             maxWidth: 300.w,
           ),
           child: Hero(
-            tag: widget.model.imgUrls.first.url,
+            tag: ImgModel.first(widget.model.imgUrls),
             child: FadeInImage.assetNetwork(
               placeholder: R.ASSETS_IMAGES_PLACEHOLDER_WEBP,
-              image: API.image(widget.model.imgUrls.first.url),
+              image: API.image(ImgModel.first(widget.model.imgUrls)),
             ),
           ),
         ),
@@ -306,7 +298,8 @@ class _ChatCardState extends State<ChatCard> {
               clipBehavior: Clip.antiAlias,
               child: FadeInImage.assetNetwork(
                 placeholder: R.ASSETS_IMAGES_PLACEHOLDER_WEBP,
-                image: API.image(firstHead),
+                image:
+                    API.image(ImgModel.first(widget.model.headSculptureImgUrl)),
                 height: 86.w,
                 width: 86.w,
                 fit: BoxFit.cover,
diff --git a/lib/ui/manager/questionnaire/questionnaire_detail_page.dart b/lib/ui/manager/questionnaire/questionnaire_detail_page.dart
index 56a22c4e..d146545e 100644
--- a/lib/ui/manager/questionnaire/questionnaire_detail_page.dart
+++ b/lib/ui/manager/questionnaire/questionnaire_detail_page.dart
@@ -1,3 +1,4 @@
+import 'package:akuCommunity/model/common/img_model.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 
@@ -219,11 +220,13 @@ class _QuestionnaireDetailPageState extends State<QuestionnaireDetailPage> {
                       borderRadius: BorderRadius.circular(4.w),
                     ),
                     width: double.infinity,
-                    height: 228.w,
                     clipBehavior: Clip.antiAlias,
                     child: FadeInImage.assetNetwork(
-                        placeholder: R.ASSETS_IMAGES_LOGO_PNG,
-                        image: API.image(_model.voResourcesImgList.first.url)),
+                      placeholder: R.ASSETS_IMAGES_PLACEHOLDER_WEBP,
+                      image: API.image(
+                        ImgModel.first(_model.voResourcesImgList),
+                      ),
+                    ),
                   ),
                   40.w.heightBox,
                   Container(
diff --git a/lib/ui/manager/questionnaire/questionnaire_page.dart b/lib/ui/manager/questionnaire/questionnaire_page.dart
index b34bc702..db5ebd90 100644
--- a/lib/ui/manager/questionnaire/questionnaire_page.dart
+++ b/lib/ui/manager/questionnaire/questionnaire_page.dart
@@ -1,3 +1,4 @@
+import 'package:akuCommunity/model/common/img_model.dart';
 import 'package:flutter/material.dart';
 
 import 'package:flustars/flustars.dart';
@@ -21,7 +22,7 @@ class QuestionnairePage extends StatefulWidget {
 }
 
 class _QuestionnairePageState extends State<QuestionnairePage> {
-  EasyRefreshController _easyRefreshController;
+  EasyRefreshController _easyRefreshController = EasyRefreshController();
   @override
   void initState() {
     super.initState();
@@ -68,8 +69,9 @@ class _QuestionnairePageState extends State<QuestionnairePage> {
                   height: 120.w,
                   child: ClipRRect(
                     child: FadeInImage.assetNetwork(
-                        placeholder: R.ASSETS_IMAGES_LOGO_PNG,
-                        image: API.image(model.imgUrls.first.url)),
+                      placeholder: R.ASSETS_IMAGES_PLACEHOLDER_WEBP,
+                      image: API.image(ImgModel.first(model.imgUrls)),
+                    ),
                   ),
                 ),
                 20.w.widthBox,
@@ -146,6 +148,12 @@ class _QuestionnairePageState extends State<QuestionnairePage> {
     );
   }
 
+  @override
+  void dispose() {
+    _easyRefreshController?.dispose();
+    super.dispose();
+  }
+
   @override
   Widget build(BuildContext context) {
     return BeeScaffold(