SOURCE

 function guess() {
        let num = parseInt(Math.random() * 6 + 1)
        return new Promise((resolve, reject) => {
            resolve()
            reject()
           /*  if (num > 3) {
                console.log('大');
                resolve('then中的大')
                console.log('大2');
            } else {
                console.log('小');
                reject('then中的小')
                console.log('小2'); 
            }
            console.log('开始啦1');
            setTimeout(() => {
                resolve(11111)
                console.log(123);
            }, 000);
            console.log('开始啦2');
            setTimeout(() => {
                console.log(66666666);
            }, 2000); */
        })
    }

var Main = {
  data() {
    return {
      tableData: [{
        name: 'test1',
        sex: '男',
        date: '2019-08',
        children: [
          {
            name: 'test2',
        		sex: '女',
        		date: '2019-08',
            children: [
              {
                name: 'test3',
                sex: '男',
                date: '2019-08',
              },
              {
                name: 'test11',
                sex: '男',
                date: '2019-08',
              }
            ]
          },
          {
            name: 'test7',
            sex: '女',
            date: '2019-08',
            children: [
              {
                name: 'test9',
                sex: '男',
                date: '2019-08',
              }
            ]
          }
        ]
      },
      {
        name: 'test4',
        sex: '男',
        date: '2019-08',
        children: [
          {
            name: 'test5',
        		sex: '女',
        		date: '2019-08',
          },
          {
            name: 'test15',
        		sex: '女',
        		date: '2019-08',
          }
        ]
      }],
      data1: [{
        name: 'test1',
        sex: '男',
        date: '2019-08',
        children: [
          {
            name: 'test2',
        		sex: '女',
        		date: '2019-08',
            children: [
              {
                name: 'test3',
                sex: '男',
                date: '2019-08',
              },
              {
                name: 'test11',
                sex: '男',
                date: '2019-08',
              }
            ]
          },
          {
            name: 'test7',
            sex: '女',
            date: '2019-08',
            children: [
              {
                name: 'test9',
                sex: '男',
                date: '2019-08',
              }
            ]
          }
        ]
      },
      {
        name: 'test4',
        sex: '男',
        date: '2019-08',
        children: [
          {
            name: 'test5',
        		sex: '女',
        		date: '2019-08',
          },
          {
            name: 'test15',
        		sex: '女',
        		date: '2019-08',
          }
        ]
      }],
      data2: [{
          name: 'A2_test1xx',
        sex: '男',
        date: '2019-08',
      },{
        name: 'A2_test1',
        sex: '男',
        date: '2019-08',
        children: [
          {
            name: 'A2_test2',
        		sex: '女',
        		date: '2019-08',
            children: [
              {
                name: 'A2_test3',
                sex: '男',
                date: '2019-08',
              },
              {
                name: 'A2_test11',
                sex: '男',
                date: '2019-08',
              }
            ]
          },
          {
            name: 'A2_test7',
            sex: '女',
            date: '2019-08',
            children: [
              {
                name: 'A2_test9',
                sex: '男',
                date: '2019-08',
              }
            ]
          }
        ]
      },
      {
        name: 'A2_test4',
        sex: '男',
        date: '2019-08',
        children: [
          {
            name: 'A2_test5',
        		sex: '女',
        		date: '2019-08',
          },
          {
            name: 'A2_test15',
        		sex: '女',
        		date: '2019-08',
          }
        ]
      }]
    }
  },
  methods: {
    async goPage(index) {
        if (index === 1) {
            this.tableData = this.data1
        } else {
            console.log('xxxx')
            const a=  await guess()
            console.log('124124', a)
            this.tableData = this.data2
        }
    },
    reset() {
        console.log(this.$refs.table.getCheckboxReserveRecords())
        this.tableData = []

        setTimeout(() => {
            this.tableData = this.data2
        }, 2000)
    },
    clearCheckbox() {
        this.$refs.table.clearCheckboxRow()
    },
    handleCheckboxReserveRow (row, checked) {
        // 源码 table内的方法
        const { checkboxReserveRowMap, checkboxOpts } = this
        if (checkboxOpts.reserve) {
        const rowid = getRowid(this, row)
        if (checked) {
            checkboxReserveRowMap[rowid] = row
        } else if (checkboxReserveRowMap[rowid]) {
            delete checkboxReserveRowMap[rowid]
        }
        }
    },
  }
};


var Ctor = Vue.extend(Main);
new Ctor().$mount('#app')

<script src="https://cdn.jsdelivr.net/npm/vue"></script>
<script src="https://cdn.jsdelivr.net/npm/xe-utils"></script>

<script src="https://cdn.jsdelivr.net/npm/vxe-table"></script>

<!-- <script src="https://unpkg.com/vxe-table@2.9.26/lib/index.umd.js"></script> -->
<!-- 使用 cdn 引用方式需要注意是否锁定版本，默认指向最新版本 -->
<!-- <link rel="stylesheet" href=" https://unpkg.com/vxe-table@2.9.26/lib/index.css"> -->

<div id="app">
  <template>
      <p>
          <vxe-button size="small" content="1"
            @click="goPage(1)"></vxe-button>
          <vxe-button size="small" content="2"
           @click="goPage(2)"></vxe-button>

        <vxe-button size="small" content="Reset"
           @click="reset"></vxe-button>
        <vxe-button size="small" content="clearCheckbox"
        @click="clearCheckbox"></vxe-button>
      </p>
    <div>
      <vxe-table
        ref="table"
        row-id="name"
        :data="tableData"
        :checkbox-config="{reserve: true}"
        :tree-config="{children: 'children', indent: 0, reserve: true, expandAll: true }">
        <vxe-table-column type="checkbox" width="60"></vxe-table-column>
        <vxe-table-column type="seq"></vxe-table-column>
        <vxe-table-column field="name" title="Name" tree-node></vxe-table-column>
        <vxe-table-column field="sex" title="Sex"></vxe-table-column>
        <vxe-table-column field="date" title="Date"></vxe-table-column>
      </vxe-table>
    </div>
  </template>
</div>

@import url("https://cdn.jsdelivr.net/npm/vxe-table/lib/style.css");