优惠券列表优化

@@ -10,7 +10,8 @@ export default class MyCoupon extends Component {
   constructor() {
     super(...arguments);
     this.state = {
-      couponList: []
+      couponList: [],
+      complete: false
     };
   }
 
@@ -22,7 +23,7 @@ export default class MyCoupon extends Component {
 
   async getCouponList() {
     let couponList = await model.myCouponList();
-    this.setState({couponList});
+    this.setState({couponList, complete: true});
   };
 
   showNote = (value) => {
@@ -35,7 +36,8 @@ export default class MyCoupon extends Component {
   };
 
   render() {
-    let {couponList} = this.state;
+    let {couponList, complete} = this.state;
+    if (!complete) return;
     return (
       <View className={couponList && couponList.length ? 'page bg' : 'page'}>
         <View className='title'>优惠券</View>