选择交互优化

@@ -2,11 +2,16 @@ Component({
   properties: {
     show: {
       type: Boolean,
-      value: false
+      value: false,
+      observer: '_show'
     },
     coupons: {
       type: Array,
       value: []
+    },
+    selectedCode: {
+      type: String,
+      value: ''
     }
   },
   data: {
@@ -47,6 +52,26 @@ Component({
         [`coupons[${idx}].isChosen`]: false
       });
       this.data.chosenIdx = '';
+    },
+    _show: function (show) {
+      if (show) {
+        if (this.data.selectedCode) {
+          this.data.coupons.forEach((item, index) => {
+            if (item.coupon_code === this.data.selectedCode) {
+              this.setData({
+                [`coupons[${index}].isChosen`]: true
+              });
+              this.data.chosenIdx = index;
+            } else {
+              this.setData({
+                [`coupons[${index}].isChosen`]: false
+              });
+            }
+          });
+        } else {
+          this.data.chosenIdx = '';
+        }
+      }
     }
   }
 });

@@ -36,6 +36,6 @@
     </view>
   </view>
 </view>
-<couponSelect bindconfirmselect="confirmSelectCoupon" show="{{selectingCoupon}}"
+<couponSelect bindconfirmselect="confirmSelectCoupon" show="{{selectingCoupon}}" selected-code="{{selectCouponCode}}"
               bindcancel="cancelSelectCoupon" coupons="{{coupons}}"></couponSelect>
 <checkstore id="check" storeId="{{storeId}}" productId="{{product_id}}"></checkstore>