mixin bug修复

src/mixin/index.js

@@ -255,6 +255,7 @@ const platformMixin = {
   methods: {
     // 通过音频类型获取对应的平台
     getPlatform(e) {
+      this.platformOptions = []
       return new Promise((resolve, reject) => {
         audioType(e).then(res => {
           if (res.code === 0) {