diff --git a/app/api/mobile/apis/courses.rb b/app/api/mobile/apis/courses.rb
index 6a4175706..c8b67448e 100644
--- a/app/api/mobile/apis/courses.rb
+++ b/app/api/mobile/apis/courses.rb
@@ -734,7 +734,7 @@ module Mobile
           out = {status: status}
           message = case status
                       when 0; "退出班级成功"
-                      when 1; "您不在课程中"
+                      when 1; "您不是该班级成员"
                       when 2; "您还未登录"
                       when 3; "管理员不能退出班级"
                       else; "未知错误，请稍后再试"
diff --git a/app/services/courses_service.rb b/app/services/courses_service.rb
index c5084f228..f23b59dcb 100644
--- a/app/services/courses_service.rb
+++ b/app/services/courses_service.rb
@@ -79,7 +79,8 @@ class CoursesService
     else
       c = Course.find(course)
     end
-    if current_user.nil? || !(current_user.admin? || c.is_public == 1 || (c.is_public == 0 && current_user.member_of_course?(c)))
+    # if current_user.nil? || !(current_user.admin? || c.is_public == 1 || (c.is_public == 0 && current_user.member_of_course?(c)))
+    if current_user.nil?
       raise '403'
     end
     #@canShowCode = isCourseTeacher(User.current.id,course) && params[:role] != '1'
@@ -458,8 +459,8 @@ class CoursesService
     joined = StudentsForCourse.where('student_id = ? and course_id = ?', user.id, params[:object_id])
     joined.each do |join|
       join.delete
-      @state = 0
     end
+    @state = 0
     @state
   end
 
diff --git a/public/assets/wechat/class.html b/public/assets/wechat/class.html
index 8208c3883..706cf5206 100644
--- a/public/assets/wechat/class.html
+++ b/public/assets/wechat/class.html
@@ -217,7 +217,7 @@
         <div ng-if="course_has_more" class="mb50">
             <div id="more_course_activities" class="more-events mt10" ng-click="getClassActivities(course_activities_page+1);">更多</div>
         </div>
-        <div class="bottom-tab-wrap mt10">
+        <div ng-show="course.is_member" class="bottom-tab-wrap mt10">
             <a ng-show="isTeacher" ng-click="goPublishNotice()" class="weixin-tab link-blue2 border-top">发布通知</a>
             <a ng-click="goPublishIssue()" class="weixin-tab link-blue2 border-top">发起讨论</a>
         </div>
@@ -259,7 +259,7 @@
             <div class="cl"></div>
         </div>
 
-        <div class="bottom-tab-wrap mt10" ng-class="{'undis': !showClassMate}">
+        <div ng-show="course.is_member" class="bottom-tab-wrap mt10" ng-class="{'undis': !showClassMate}">
             <a ng-show="!course.is_creator" ng-click="quit()" class="weixin-tab link-blue2 border-top">退出班级</a>
         </div>
     </div>
diff --git a/public/assets/wechat/project.html b/public/assets/wechat/project.html
index 8dfba3619..89cbb1418 100644
--- a/public/assets/wechat/project.html
+++ b/public/assets/wechat/project.html
@@ -98,7 +98,7 @@
         <div ng-if="project_has_more" class="mb50">
             <div id="more_project_activities" class="more-events mt10" ng-click="getActivities(project_activities_page+1);">更多</div>
         </div>
-        <div class="bottom-tab-wrap mt10">
+        <div ng-show="project.is_member" class="bottom-tab-wrap mt10">
             <a ng-click="goPublishNote()" class="weixin-tab link-blue2 border-top">发布新帖</a>
         </div>
     </div>
@@ -138,7 +138,7 @@
             <img src="/images/wechat/setting.png" ng-show = "master.user.id != project.user_id && project.can_setting " width="15" class="class-list-setting" ng-click="onSetting(report)" />
             <div class="cl"></div>
         </div>
-        <div class="bottom-tab-wrap mt10" ng-class="{'undis': currentTab != 2}">
+        <div ng-show="project.is_member" class="bottom-tab-wrap mt10" ng-class="{'undis': currentTab != 2}">
             <a ng-show="!project.is_creator" ng-click="quit()" class="weixin-tab link-blue2 border-top">退出项目</a>
         </div>
     </div>
diff --git a/public/javascripts/wechat/controllers/class_publishissue.js b/public/javascripts/wechat/controllers/class_publishissue.js
index 1cd7f1285..09b995bea 100644
--- a/public/javascripts/wechat/controllers/class_publishissue.js
+++ b/public/javascripts/wechat/controllers/class_publishissue.js
@@ -55,7 +55,7 @@ app.controller('ClassPublishIssueController', ['$scope', '$http', 'auth', 'confi
         ).then(function(response){
                 if(response.data.status == 0)
                 {
-                    vm.alertService.showMessage('提示', '您已成功发布问题',function(){
+                    vm.alertService.showMessage('提示', '发布成功',function(){
                         rms.save('course_activities_page',0);
                         rms.save("course_activities",[]);
                         rms.save("course_has_more",false);
diff --git a/public/javascripts/wechat/controllers/class_publishnotice.js b/public/javascripts/wechat/controllers/class_publishnotice.js
index a0b9ab676..b900305c1 100644
--- a/public/javascripts/wechat/controllers/class_publishnotice.js
+++ b/public/javascripts/wechat/controllers/class_publishnotice.js
@@ -55,7 +55,7 @@ app.controller('ClassPublishNoticeController', ['$scope', '$http', 'auth', 'conf
         ).then(function(response){
                 if(response.data.status == 0)
                 {
-                    vm.alertService.showMessage('提示', '您已成功发布通知',function(){
+                    vm.alertService.showMessage('提示', '发布成功',function(){
                         rms.save('course_activities_page',0);
                         rms.save("course_activities",[]);
                         rms.save("course_has_more",false);
diff --git a/public/javascripts/wechat/controllers/project_publishnote.js b/public/javascripts/wechat/controllers/project_publishnote.js
index 231faaea6..f39b32827 100644
--- a/public/javascripts/wechat/controllers/project_publishnote.js
+++ b/public/javascripts/wechat/controllers/project_publishnote.js
@@ -56,7 +56,7 @@ app.controller('ProjectPublishNoteController', ['$scope', '$http', 'auth', 'conf
         ).then(function(response){
                 if(response.data.status == 0)
                 {
-                    vm.alertService.showMessage('提示', '您已成功发布帖子',function(){
+                    vm.alertService.showMessage('提示', '发布成功',function(){
                         rms.save('project_activities_page',0);
                         rms.save("project_activities",[]);
                         rms.save("project_has_more",false);