添加续费功能

src/pages/pay/index.vue

@@ -10,12 +10,12 @@
       <div class="num">
         ¥
         <span>199</span>.00
-        <!-- <i>课程有效期剩余30天</i> -->
+        <i v-if="orderStatus === 0">课程有效期剩余30天</i>
       </div>
       <div class="btn" @click="goPay" v-if="orderStatus === 100">立即购买</div>
       <div class="btn active" v-if="orderStatus === 1" @click="goHome">已购买</div>
       <div class="btn" v-if="orderStatus === -1" @click="goMyOrder">待支付</div>
-      <!-- <div class="btn xf" @click="goMyOrder">续费</div> -->
+      <div class="btn xf" @click="goPay" v-if="orderStatus === 0">续费</div>
     </div>
     <pay-we-chart :requestParam="requestParam"></pay-we-chart>
   </div>