fix: fixed overlay component show type

pages/buy/buy.wxml

@@ -50,12 +50,12 @@
   </view>
   <view class="pay-btn default-btn ittflex" bindtap="handleWXPay">立即支付</view>
   <view class="s-tips">购买成功后，体验次数立即到账，不可退款</view>
-  <van-overlay show="{{ vanoverlayshow }}" bind:click="onClickHide">
+  <van-overlay show="{{ vanoverlayshow }}">
     <view class="wrapper ittflex">
       <view class="model">
         <view class="top-title">支付成功，立即去预约</view>
         <view class="bottom-action ittflex">
-          <view class="btn cancel-btn ittflex">取消</view>
+          <view class="btn cancel-btn ittflex" bindtap="onClickHide">取消</view>
           <view class="btn confirm-btn ittflex" bindtap="handleAppointment">去预约</view>
         </view>
       </view>