修复修改问题

src/views/accompaniment/modals/form.vue

@@ -529,7 +529,7 @@ export default {
       const xmlRead = new FileReader()
       xmlRead.onload = res => {
         this.partListNames = this.getPartListNames(res.target.result)
-        this.gradual = getGradualLengthByXml(xmlres.data).filter(item => item.length === 2)
+        this.gradual = getGradualLengthByXml(res.target.result).filter(item => item.length === 2)
         for (let j = 0; j < this.form.sysMusicScoreAccompaniments.length; j++) {
           this.form.sysMusicScoreAccompaniments[j].track =  this.partListNames[j]
           if (!this.form.sysMusicScoreAccompaniments[j].speed) {