// 获取树形数据的最大深度值
getMaxFloor(treeData) {
  let deep = 0
  let deepEach = (data, floor) => {
    data.map(item => {
      item.floor = floor
      if (floor > deep) {
        deep = floor
      }
      if (item.subOrdinate && item.subOrdinate.length > 0) {
        deepEach(item.subOrdinate, floor + 1)
      }
    })
  }
  deepEach(treeData, 1)
  return deep
}

// 根据深度值查找该深度下的所有节点
getChildByIndex(treeData, deep) {
  let max = 0
  let arr = []
  let deepEach = (data, floor) => {
    data.map(item => {
      item.floor = floor
      if (item.floor === deep) {
        arr.push(item.value)
      }
      if (floor > max) {
        max = floor
      }
      if (item.children && item.children.length > 0) {
        deepEach(item.children, floor + 1)
      }
    })
  }
  deepEach(treeData, 1)
  return arr
}

selectMulti(val) {
  const treeData = this.employeeOptions
  let selectedEmployee = []
  val.sort().forEach((el, index) => {
    let level = this.getChildByIndex(treeData, el)
    selectedEmployee = selectedEmployee.concat(level)
  })
  this.defaultExpandKeys = this.getChildByIndex(treeData, val[val.length - 1] - 1)
  this.$refs.employeeTree.setCheckedKeys(selectedEmployee)
  this.employeeAccounts = Array.from(new Set(selectedEmployee))
  this.getEmployeeDocuments()
}