zTree中父节点禁用，子节点可以用

axios.get(‘/base/unit/unittree‘)
              .then((response) => {
                let { meta, data } = response.data;
                if (meta.success) {
                  if (data && data.unitList) {
                    // 部门树数据配置
                    let unitList = data.unitList;
                    self.unitList = data.unitList;
                    let zNodes = unitList;
                    zNodes[0].open = true;

                    // 初始化部门树
                    $.fn.zTree.init($("#unitTree"), self.unitTreeSetting, zNodes);
                    var treeObj = $.fn.zTree.getZTreeObj("unitTree");
                    treeObj.expandAll(true);
                    //父节点不能选择
                    var nodes = treeObj.transformToArray(treeObj.getNodes());
                    for (var i=0, l=nodes.length; i < l; i++) {
                      if (nodes[i].isParent){
                          treeObj.setChkDisabled(nodes[i], true);
                      }
                    }

                    self.assignedUnit=[];
                  }
                }
              });