element框架table索引问题

Table-column的type属性可以设置表格显示索引，
el-table-column属性解析：

1、正常一页默认效果

//第一列设置type="index"
<template>
  <el-table
    ref="singleTable"
    :data="tableData"
    highlight-current-row
    style="width: 100%">
    <el-table-column
      type="index"
      width="50">
    </el-table-column>
    <el-table-column property="date" label="日期" width="120"></el-table-column>
    <el-table-column property="name" label="姓名" width="120"></el-table-column>
    <el-table-column property="address" label="地址"></el-table-column>
  </el-table>
</template>

<script>
  export default {
    data() {
      return {
        tableData: [{
          date: '2016-05-02',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1518 弄'
        }, {
          date: '2016-05-04',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1517 弄'
        }, {
          date: '2016-05-01',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1519 弄'
        }, {
          date: '2016-05-03',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1516 弄'
        }],
        currentRow: null
      }
    },

    methods: {
    }
  }
</script>

2、一页自定义索引

如果不想按照123这样的默认顺序，可自定义索引，使用index属性；如果设置固定值，则显示固定值，如果绑定一个函数，则根据函数返回值自定义索引

<template>
  <el-table
    ref="singleTable"
    :data="tableData"
    style="width: 100%">
    <el-table-column
      type="index"
      :index="indexMethod">
    </el-table-column>
    <el-table-column property="date" label="日期"></el-table-column>
    <el-table-column property="name" label="姓名"></el-table-column>   
  </el-table>
</template>

<script>
  export default {
    data() {
      return {
        tableData: [{
          date: '2016-05-02',
          name: '王小虎'
        }, {
          date: '2016-05-04',
          name: '王小虎'
        }, {
          date: '2016-05-01',
          name: '王小虎'
        }, {
          date: '2016-05-03',
          name: '王小虎'
        }],//表格数据
        currentRow: null
      }
    },

    methods: {
      //自定义索引
      indexMethod(index) {
        return index * 2;  //默认index为0,1，2,3，4,5，*2，自定义索引变为：0,2，4,6，8,10
      },
    }
  }
</script>

3、带分页时，解决分页每次从1开始的问题

<template>
  <el-table
    ref="singleTable"
    :data="tableData"
    style="width: 100%">
    <el-table-column
      type="index"
      :index="indexMethod">
    </el-table-column>
    <el-table-column property="date" label="日期"></el-table-column>
    <el-table-column property="name" label="姓名"></el-table-column>   
  </el-table>
  <el-pagination
		background
		hide-on-single-page
		layout="total,prev, pager, next, sizes, jumper"
		:current-page="currentPage"
		:page-size="pageSize"
		@size-change="otherSizeChange"
		@current-change="otherCurrentChange"
		:page-sizes="[10, 20, 30, 40]"
		:total="ListTotal">
</el-pagination>
</template>

<script>
  export default {
    data() {
      return {
        tableData: [{
          date: '2016-05-02',
          name: '王小虎'
        }, {
          date: '2016-05-04',
          name: '王小虎'
        }, {
          date: '2016-05-01',
          name: '王小虎'
        }, {
          date: '2016-05-03',
          name: '王小虎'
        }],//表格数据
        currentPage: 1,//默认第一页
        pageSize:10, //每页显示10条数据，根据接口调取第一页的10条数组给tableData
        ListTotal: 100,
      }
    },

    methods: {
	      //自定义索引
	      indexMethod(index) {
	        if( this.openType==3 ){
				return index + (this.currentPage- 1) * this.pageSize + 1; //currentPage当前页，pageSize每页显示数量
			}
	      },
        /** 每页显示条数调整 **/
		otherSizeChange(num){
		   this.currentPage = 1;
		   this.pageSize = num;
		   this.getList();//调取接口
		},
		/** 页码改变 **/
		otherCurrentChange(page){
			this.currentPage = page;
			this.getList(); //调取接口
		},
    }
  }
</script>