订单消息0不显示

@@ -6,7 +6,7 @@
     <view class="tab_item {{current==4?'active':''}}" data-current='4' bindtap='chargeTab'>已拼成</view>
     <view class="tab_item {{current==4?'active':''}}" data-current='4' bindtap='chargeTab'>已拼成</view>
     <view class="tab_item {{current==6?'active':''}}" data-current='6' bindtap='chargeTab'>已完成</view>
     <view class="tab_item {{current==6?'active':''}}" data-current='6' bindtap='chargeTab'>已完成</view>
     <view class="tab_item {{current==5?'active':''}}" data-current='5' bindtap='chargeTab'>已取消</view>
     <view class="tab_item {{current==5?'active':''}}" data-current='5' bindtap='chargeTab'>已取消</view>
-    <view class="message">{{message_num}}</view>
+    <view class="message" wx:if="{{message_num>0}}">{{message_num}}</view>
 </view>
 </view>
 
 
 <!--订单列表-->
 <!--订单列表-->