fix copy

@@ -4,6 +4,11 @@
       <div class="item title mg4">我的邀请码</div>
       <div class="item code mg3">{{code}}</div>
 
+       <div class="item mg2">
+         <div class="btn copy">
+           复制
+         </div>
+       </div>
 
       <div class="item count-wrapper">
         <div >
@@ -16,6 +21,7 @@
           <div class="tip">好友完成订单数</div>
         </div>
       </div>
+
      </template>
 
      <template v-else>
@@ -49,7 +55,7 @@ export default {
   mounted() {
     let vm = this;
 
-    this.clipboard = new ClipboardJS(this.$el.getElementsByClassName('btn'), {
+    this.clipboard = new ClipboardJS(this.$el.getElementsByClassName('copy'), {
       text: () => {
         return this.code;
       }