set coupon page header height in wechat

@@ -24,6 +24,10 @@ class ConponController extends Page {
             exchangeBox: $('.exchange-box')
         };
         
+        if ($('#yoho-header').hasClass('hide')) {
+            this.view.page.removeClass('cpage-padding284');
+        }
+
         this.view.filterBtn.on('click', this.tabChange.bind(this));
         this.view.showFilterBtn.on('click', this.showFilter.bind(this));
         this.view.filterItem.on('click', 'button', this.filterCoupons.bind(this));