that报错

src/pages/deliver/coms/comScanDeliverPack.vue

@@ -299,8 +299,8 @@
 
 
 			afterGetBalance(label, balance, packageInfo) {
-				try {
 				let that = this;
+				try {
 					let itemCode = label.itemCode;
 					let packingCode = label.packingNumber;
 					let lot = label.batch;