优化购物车页面

src/pages/service/cart.vue

@@ -34,7 +34,7 @@
                         <text class="text">合计：</text>
                         <text class="price">¥ {{ utils.formatNumber(item.total, 2) }}</text>
                     </view>
-                    <view class="button" @click="createOrder(index)">
+                    <view class="button" :class="{ active: item.total > 0 }" @click="createOrder(index)">
                         <text>去下单</text>
                     </view>
                 </view>
@@ -188,8 +188,6 @@ export default {
             });
             if (orderdata.length > 0) {
                 this.$utils.toPage("/pages/order/create?orderData=" + encodeURIComponent(JSON.stringify(orderdata)));
-            } else {
-                this.$utils.toast("未选择任何商品");
             }
         },
     },
@@ -274,6 +272,10 @@ export default {
         border-radius: 23rpx;
         font-size: 24rpx;
         color: #ffffff;
+        opacity: 0.7;
+    }
+    .button.active {
+        opacity: 1;
     }
 }
 .more {