no message

src/packageMaterial/pages/sale/pay.vue

@@ -30,7 +30,7 @@
 
       <template slot="footer">
         <view class="footer-btn-group">
-          <u-button text="取消订单" @click="cancelOrder"></u-button>
+          <u-button v-if="detail.ifCancel" text="取消订单" @click="cancelOrder"></u-button>
           <u-button text="扫码支付" type="primary" @click="scanCode"></u-button>
         </view>
       </template>