fix(shoppingCart): bug#16 购物车页面缓存导致的bug修复

pages/shoppingCar/index.vue

@@ -128,9 +128,9 @@
             :loading="isLoading"
             :loadingText="'购买中'"
             @tap="goBuy"
-            :disabled="!(isTo > 0 && isTo < 2)"
+            :disabled="checkoutDisabled"
             color="#FB3024"
-            >{{ '去结算' }}
+            >去结算
           </u-button>
         </view>
       </view>
@@ -186,7 +186,6 @@ export default {
       isSelectAll: [],
       shopCarList: [],
       isLoading: false,
-      isTo: 0,
       goodsCheck: [],
       totalPrice: 0,
       totalAchive: 0,
@@ -202,6 +201,11 @@ export default {
       // content:'确认删除该商品？'
     };
   },
+  computed: {
+    checkoutDisabled() {
+      return this.shopCarList.filter(item => item.isSelected).length !== 1
+    }
+  },
   watch: {
     selTable: {
       handler(n, o) {
@@ -218,7 +222,8 @@ export default {
     // this.getCarList()
   },
   onShow() {
-    this.getCarList();
+    this.getCarList()
+    this.initCarList()
   },
   methods: {
     tableTrue() {
@@ -534,13 +539,13 @@ export default {
         });
     },
     checkArea() {
-      let i = 0;
-      this.shopCarList.forEach((item) => {
-        if (item.isSelected) {
-          i++;
-        }
-      });
-      this.isTo = i;
+      // let i = 0;
+      // this.shopCarList.forEach((item) => {
+      //   if (item.isSelected) {
+      //     i++;
+      //   }
+      // });
+      // this.isTo = i;
       let arr = [];
       this.shopCarList.forEach((item) => {
         item.shoppingCartList.forEach((ctem) => {
@@ -630,6 +635,13 @@ export default {
         });
       });
     },
+    initCarList() {
+      this.shopCarList = []
+      this.goodsCheck = []
+      this.totalPrice = 0
+      this.totalAchive = 0
+      this.num = 0
+    },
     getCarList() {
       api.getShopping().then((res) => {
         res.data.forEach((item) => {