解决iview 'You may have an infinite update loop in watcher with expression "columns"'

解决方案

单表头是可以动态变化不需要增添什么东西

多表头目前iview尚不能动态变化，会报错You may have an infinite update loop in watcher with expression "columns"解决方法是github大神提供的：需要修改iview.js源码

将iview.js中

columns: { handler: function handler() { var colsWithId = this.makeColumnsId(this.columns); his.allColumns = (0, _util.getAllColumns)(colsWithId); this.cloneColumns = this.makeColumns(colsWithId); this.columnRows = this.makeColumnRows(false, colsWithId); this.leftFixedColumnRows = this.makeColumnRows('left', colsWithId); this.rightFixedColumnRows = this.makeColumnRows('right', colsWithId); this.rebuildData = this.makeDataWithSortAndFilter(); this.handleResize(); }, deep: true },

修改为

columns: { handler: function handler() { //[Fix Bug]You may have an infinite update loop in watcher with expression "columns" var tempClonedColumns = (0, _assist.deepCopy)(this.columns); var colsWithId = this.makeColumnsId(tempClonedColumns); //[Fix Bug End] this.allColumns = (0, _util.getAllColumns)(colsWithId); this.cloneColumns = this.makeColumns(colsWithId); this.columnRows = this.makeColumnRows(false, colsWithId); this.leftFixedColumnRows = this.makeColumnRows('left', colsWithId); this.rightFixedColumnRows = this.makeColumnRows('right', colsWithId); this.rebuildData = this.makeDataWithSortAndFilter(); this.handleResize(); }, deep: true },

demo

<template> <div> 单表头： <Table :columns="columns1" @on-row-click="onRowClick" :data="data1"></Table> 多表头： <Table :columns="columns12" @on-row-click="onRowClick2" :data="data1" border height="500"></Table> </div></template><script> export default { data() { return { columns1: [ { title: 'Name', key: 'name' }, { title: 'Age', key: 'age' }, { title: 'Address', key: 'address' } ], data1: [ { 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' }, { name: 'Joe Black', age: 30, address: 'Sydney No. 1 Lake Park', date: '2016-10-02' }, { name: 'Jon Snow', age: 26, address: 'Ottawa No. 2 Lake Park', date: '2016-10-04' } ], columns12: [{ title: 'Name', align:'center', children: [{ title: 'nickName', key: 'name', }, { title: 'realName', key: 'name' } ] }, { title: 'Age', key: 'age' }, { title: 'Address', key: 'address' } ], } }, methods: { onRowClick() { if('City'!==this.columns1[this.columns1.length-1].title) { this.columns1.splice(this.columns1.length, 0, { title: 'City', key: 'address' }) } }, onRowClick2() { if('City'!==this.columns12[this.columns12.length-1].title) { this.columns12.splice(this.columns12.length, 0, { title: 'City', key: 'address' }) } } }, }</script>

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