补上播放图标

src/components/courseTree/CourseTree.vue

@@ -323,7 +323,9 @@
                             }}</span>
                           </div>
                         </div>
-
+                        <div class="lear-state" v-if="isActive(section)">
+                          <img src="../../assets/learing.gif" alt="" />
+                        </div>
                         <template v-if="section.durationTime > 0">
                           <div class="during">
                             {{ $tools.secondToDate(section.durationTime) }}
@@ -474,7 +476,9 @@
                       </div>
                     </div>
                   </template>
-
+                  <div class="lear-state" v-if="isActive(menu)">
+                    <img src="../../assets/learing.gif" alt="" />
+                  </div>
                   <template v-if="menu.durationTime > 0">
                     <div class="during">
                       {{ $tools.secondToDate(menu.durationTime) }}