add: 消费列表_无列表

src/pages/mySpend/mySpend.wxml

 <!--pages/userCenter.wxml-->
-<view class='page-mySpend'>
+<view wx:if="{{!orderList.length}}" class="detail-list-no">还没有任何消费记录</view>
+<view class='page-mySpend' wx:if="{{orderList.length}}">
   <scroll-view scroll-y bindscrolltolower="bindDownLoad">
     <view class='spend-wrap' wx:for='{{orderList}}' wx:for-item="item" wx:for-index="k" wx:key="{{k}}">
         <view class='spend-list' data-order-no="{{item.orderNo}}" bindtap="goDetail">

src/pages/mySpend/mySpend.wxss

@@ -30,4 +30,11 @@ page{
 }
 .no-bottom {
   margin: 50rpx 0;
-}
\ No newline at end of file
+}
+
+.detail-list-no {
+  font-size: 24rpx;
+  color: #333;
+  padding-top: 200rpx;
+  text-align: center;
+}