修改样式

src/components/study.vue

@@ -251,7 +251,7 @@
                 </div>
                 <div
                   class="vedioList"
-                  :class="vedio[taskCount].length == 0 ? 'listNoVedio' : ''"
+                  :class="vedio[taskCount].length == 0 && file[taskCount].length == 0 ? 'listNoVedio' : ''"
                   v-if="
                     (vedio.length &&
                       vedio[taskCount] &&
@@ -2710,7 +2710,7 @@ export default {
             _this.selectSWorks();
             _this.selectStudent();
           }, 5000);
-          this.$nextTick(function () {
+          _this.$nextTick(function () {
             setTimeout(() => {
               var a =
                 document.getElementsByClassName("box_course")[0].offsetHeight;
@@ -2720,8 +2720,8 @@ export default {
                 a - 40 + "px";
             }, 500);
           });
-          if (this.vedio[this.taskCount].length > 0) {
-            this.vedioTime = document.getElementsByClassName(
+          if (_this.vedio[_this.taskCount].length > 0) {
+            _this.vedioTime = document.getElementsByClassName(
               "vjs-duration-display"
             )[0].textContent;
           }