data () {
 return {
 tableData: [],
 multipleSelection: [],
 pagination: {
  currentPage: 1,
  size: 10,
  total: 1000
 }
 }
},
beforeMount () {
 this.fetchData()
},
methods: {
 fetchData () {
 this.tableData = []
 let start = (this.pagination.currentPage - 1) * this.pagination.size
 let end = this.pagination.currentPage * this.pagination.size
 setTimeout(_ => {
  for (let i = start; i < end; i++) {
  this.tableData.push({
   id: i,
   name: `王${i}兰`
  })
  }
 }
 },
 handleCurrentChange () {
 this.fetchData()
 },
 handleSelectionChange (val) {
 this.multipleSelection = val
 },
}

 已选：{{ allMultipleSelection }}

allMultipleSelection: [],

handleSelectionChange (val) {
 this.multipleSelection = val
 // @tip 实现分页复选
 console.log(val, 'selection')
 setTimeout(_ => {
 this.resolveAllSelection()
 }, 50)
},
resolveAllSelection () {
 let currentPageData = this.tableData.map(item => item[this.uniqueKey]) // 当前页所有数据
 let currentPageSelected = this.multipleSelection.map(item => item[this.uniqueKey]) // 当前页已选数据
 let currentPageNotSelected = currentPageData.filter(item => !currentPageSelected.includes(item)) // 当前页未选数据
 // 将当前页已选数据放入所有已选项
 currentPageSelected.forEach(item => {
 if (!this.allMultipleSelection.includes(item)) {
  this.allMultipleSelection.push(item)
 }
 })
 // 将所有已选项数据中当前页没选择的项移除
 currentPageNotSelected.forEach(item => {
 let idx = this.allMultipleSelection.indexOf(item)
 if (idx > -1) {
  this.allMultipleSelection.splice(idx, 1)
 }
 })
 console.log(this.allMultipleSelection, 'all')
},

fetchData () {
 // ...
 setTimeout(_ => {
 // ...
 // @tip 实现分页复选
 setTimeout(_ => {
  this.setSelectedRow()
 }, 50)
 }, 200)
},
setSelectedRow () {
 // 设置当前页已选项
 this.tableData.forEach(item => {
 if (this.allMultipleSelection.includes(item[this.uniqueKey])) {
  this.$refs.asTable.toggleRowSelection(item, true)
  console.log(item[this.uniqueKey], 'set')
 }
 })
},

git clone git@github.com:careteenL/lan-vue.git
npm install
npm run serve