fix

src/modules/question/components/PropertyTreeSelect.vue

@@ -200,10 +200,10 @@ export default {
       this.emitChange();
     },
     handleCheck(nodeObj, tree) {
-      let checkedCount = tree.getCheckedNodes(true, true).length;
-      if (checkedCount >= 3) {
+      let checkedCount = tree.checkedNodes.length;
+      if (checkedCount > 3) {
         // 如果超出限制，则取消最后一次勾选
-        tree.setChecked(nodeObj.id, false);
+        this.$refs.PropertyTree.setChecked(nodeObj.id, false);
         this.$message.warning("最多只能选择3个");
       }
     },