修复bug

pages2/bank/questionBankExplain.vue

@@ -429,7 +429,7 @@ export default {
 		this.goodsQuestionList();
 	},
 	onUnload() {
-		if(this.isSubmit || this.isHistory) {
+		if(this.isSubmit || this.isHistory || this.explain) {
 			return
 		}
 		this.examRecordEdit();