添加直接收款的0元判断；

app.js

 App({
   globalData: {
-    version: "1.0.0.20200203",
+    version: "1.0.1.20200311",
     //是否使用测试支付数据
     useTestPayInfo: false,
     printerId: null,

pages/balance/balance.js

@@ -176,6 +176,7 @@ Page({
           this.setData({
             isPaying: false
           });
+          hideLoading();
         }
       }
     }.bind(this));

pages/home/home.js

@@ -80,10 +80,25 @@ Page({
             }
           });
         } else if (res.action == ACTION_DIRECT_PAYMENT) {
+          //判断金额，不允许0元支付
+          if (res.data == null) {
+            my.showToast({
+              content: "数据错误"
+            });
+          } else {
+            var miyapayUtils = require("../../utils/miyapay4.js");
+            var priceFen = miyapayUtils.yuan2Fen(res.data);
+            if (priceFen == 0) {
+              my.showToast({
+                content: "不允许0元支付"
+              });
+              return;
+            }
             //直接收款
             my.reLaunch({
               url: "/pages/balance/balance?totalPrice=" + res.data + "&totalQuantity=0&totalDisc=0&type=direct",
             });
+          }
         } else if (res.action == ACTION_CONVERT_COUPON) {
           //兑换券 
           context.setData({