iview 如何在表格中给操作图标添加Tooltip文字提示?

<template>
  <Table :columns="columns" :data="data"></Table>
</template>
<script>
export default {
  data () {
    return {
      columns: [
        {
          title: ‘Name‘,
          key: ‘name‘
        },
        {
          title: ‘Age‘,
          key: ‘age‘
        },
        {
          title: ‘Address‘,
          key: ‘address‘
        },
        {
          title: ‘操作‘,
          key: ‘action‘,
          render: (h, { row }) => {
            return h(‘div‘, [
              h(‘Tooltip‘, {
                props: {
                  placement: ‘top‘,
                  transfer: ‘true‘,
                  content: ‘提示文字内容‘
                }
              }, [
                  h(‘Icon‘, {
                    props: {
                      // custom: ‘icon-seewrap‘ //自定义图标
                      type: ‘md-add‘,
                      size: ‘28‘
                    },
                    on: {
                      click: () => {
                        // 添加
                        alert("添加")
                      }
                    }
                  })
                ])
            ])
          }
        }
      ],
      data: [
        {
          name: ‘John Brown‘,
          age: 18,
          address: ‘New York No. 1 Lake Park‘,
          date: ‘2016-10-03‘
        },
        {
          name: ‘Jim Green‘,
          age: 24,
          address: ‘London No. 1 Lake Park‘,
          date: ‘2016-10-01‘
        }
      ]
    }
  }
}
</script>