fix: 修改同步人群选择

src/components/app/my-customer/sync-crowd-dialog.vue

@@ -4,7 +4,7 @@
  * @Author: 无尘
  * @Date: 2020-08-28 10:31:09
  * @LastEditors: 无尘
- * @LastEditTime: 2020-09-15 16:51:59
+ * @LastEditTime: 2020-09-15 16:59:59
 -->
 <!--
   <sync-crowd-dialog :brand-id="brandId" :select-ids="selectIds" :total-num="totalNum" @refreshData="refreshData"></sync-crowd-dialog>
@@ -173,15 +173,15 @@ export default {
     handleSelectionChange(val) {
       const that = this;
       // 1.选择的数量>可选数量
-      if (val && val.length > 20 - that.totalNum) {
-        val.splice(val.length - 1, 1);
-        const ids = val.map(ele => ele.sceneCrowdId);
+      const selNum = 20 - that.totalNum;
+      if (val && val.length > selNum) {
+        that.multipleSelection = val.slice(0, selNum);
+        const ids = that.multipleSelection.map(ele => ele.sceneCrowdId);
         that.tableData.forEach(row => {
           if (ids.includes(row.sceneCrowdId)) {
             that.$refs.multipleTable.toggleRowSelection(row);
           }
         });
-        that.multipleSelection = val;
         return false;
       }
       that.multipleSelection = val;