修改

src/components/common/choiceFenlei.vue

 <template>
     <div>
-        <el-table ref="multipleTable" :data="dataList" tooltip-effect="dark" style="width: 100%"
+        <el-table ref="multipleTable" :data="dataList" tooltip-effect="dark" height="450" style="width: 100%"
         @selection-change="handleSelectionChange">
             <el-table-column type="selection" width="55">
             </el-table-column>

src/components/common/choiceGood.vue

@@ -34,6 +34,7 @@
 </template>
 <script>
   export default {
+    props:['ckGoods'],
     data() {
       return {
         dataList: [],
@@ -60,6 +61,10 @@
         })
       },
       handleSelectionChange(val) {
+        if(val.length>this.ckGoods){
+          this.Info('超过了');
+          val=val.slice(0,this.ckGoods);
+        }
         this.selectRow = JSON.parse(JSON.stringify(val));
       },
       handleCurrentChange(val) {

src/components/sallCenter/plugin/goods.vue

@@ -420,7 +420,7 @@
                       </div>
                     </draggable>
                     <div class="goods-add">
-                      <el-button @click="showGoodsDialog(catIndex)" icon="el-icon-plus"></el-button>
+                      <el-button @click="showGoodsDialog(catIndex),ckGoods=cat.goodsNum" icon="el-icon-plus"></el-button>
                     </div>
                   </div>
                 </div>
@@ -542,7 +542,7 @@
     </el-dialog>
     <!-- 选择商品 -->
     <el-dialog title="选择商品" :visible.sync="isShowGoods" custom-class="goodsDialog">
-      <choiceGood ref="choiceGood"></choiceGood>
+      <choiceGood ref="choiceGood" :ckGoods="ckGoods"></choiceGood>
       <span slot="footer" class="dialog-footer">
         <el-button size="small" @click="quxiaoGoods()">取 消</el-button>
         <el-button size="small" type="danger" @click="getGoodsChoice()">确 定</el-button>
@@ -567,6 +567,8 @@
     },
     data() {
       return {
+        //可以选择的商品数
+        ckGoods:0,
         data: this.goodData.data,
         position: 'center center',
         repeat: 'no-repeat',