bugfixed

pages/paysuccess/paysuccess.js

@@ -69,16 +69,21 @@ Page({
       printer.printText("收银员账号：" + this.data.paySuccessResponse.operatorId),
       printer.printText("订单号：" + this.data.paySuccessResponse.tradeNo),
       printer.printNowDate(),
-      printer.printDivide("-"),
-      printer.printText("活动商品"),
-      printer.printText("商品名称    " + "    编码    " + "    数量"),
+  
     ];
-    for (var i = 0; i < this.data.goodsList.length; i++) {
-      //循环取出商品数据
-      cmds.push(printer.setAlign(printer.ALIGN_LEFT));
-      cmds.push(printer.printText(this.data.goodsList[i].name));
-      cmds.push(printer.printTwoText(this.data.goodsList[i].barcode, this.data.goodsList[i].quantity + ""));
-    }
+
+     if(null != this.data.goodsList && this.data.goodsList.length > 0){
+        cmds.push(printer.printDivide("-"))  ,
+        cmds.push(  printer.printText("活动商品")),
+        cmds.push( printer.printText("商品名称    " + "    编码    " + "    数量"))
+       for (var i = 0; i < this.data.goodsList.length; i++) {
+         //循环取出商品数据
+         cmds.push(printer.setAlign(printer.ALIGN_LEFT));
+         cmds.push(printer.printText(this.data.goodsList[i].name));
+         cmds.push(printer.printTwoText(this.data.goodsList[i].barcode, this.data.goodsList[i].quantity + ""));
+       }
+      }
+  
     cmds.push(printer.setAlign(printer.ALIGN_LEFT));
     cmds.push(printer.printDivide("-"));
     cmds.push(printer.printText("应收金额:" + this.data.orderPriceYuan));