修改

src/components/course/classinfo-form.vue

@@ -47,7 +47,7 @@
       <div class="drawerTop">
         <div style="display:flex;align-items:center;">
           <q-avatar size="md" style="background:#d4dfff;color:#2961FE;font-weight:bold;">
-            {{classObj.ClassName.substring(0,1)}}
+            <template v-if="classObj.ClassName">{{classObj.ClassName.substring(0,1)}}</template>
           </q-avatar>
           <div class="className">
             <div class="classFirst">{{classObj.ClassName}}</div>
@@ -140,9 +140,16 @@
     },
     created() {
 
+    },
+    watch: {
+      setingObj: {
+        handler(newValue) {
+          this.queryClassInfo();
+        },
+        immediate: true
+      }
     },
     mounted() {
-      console.log("res", this.setingObj)
       this.queryClassInfo();
     },
     methods: {
@@ -150,11 +157,9 @@
         getClassInfo({
           ClassId: this.setingObj.ClassId
         }).then(res => {
-          console.log("res", res);
           if (res.Code == 1) {
                this.classObj=res.Data;
           }
-
         })
       },
       closeShenheForm() {