有的时候我们可能会遇到这种需求,用户点击某个按钮就可以增加一个同样的表单出来,点击一次增加一次。然后要用到深拷贝,Vue.js+ElementUI等等。效果大概如下,就是一个表单有下拉框和两个输入框,现在点击”添加表单”按钮之后就会多一个表单出来,点击”提交表单”后就同时提交两个表单的value值。
代码如下:
<template> <div> <div style="margin: 10px 0"> <el-button type="primary" @click="addForm">添加表单</el-button> <el-button type="primary" @click="submit">提交表单</el-button> </div> <div v-for="(item, index) in List" :key="index"> <el-form ref="form" label-width="80px"> <el-form-item label="直播平台"> <el-select v-model="item.platform" :key="index" placeholder="请选择直播平台" > <el-option :label="item2.platformName" v-for="(item2, index2) in platformNameList" :key="index2" :value="item2.platformValue" > </el-option> </el-select> </el-form-item> <el-form-item label="粉丝量"> <el-input v-model="item.fanMount" :key="index"></el-input> </el-form-item> <el-form-item label="平台ID"> <el-input v-model="item.platformId" :key="index"></el-input> </el-form-item> </el-form> </div> </div> </template> <script> export default { data() { return { title: "巡查内容页", personObj: { platform: "", fanMount: "", platformId: "", }, platformNameList: [ { platformName: "快手", platformValue: "1", }, { platformName: "抖音", platformValue: "2", }, { platformName: "淘宝", platformValue: "3", }, ], List: [ { platform: "", fanMount: "", platformId: "", }, ], }; }, methods: { //深拷贝 cloneObj(obj) { let ret; if (Array.isArray(obj)) { //创建一个空数组 ret = []; for (let i = 0; i < obj.length; i++) { ret[i] = this.cloneObj(obj[i]); } return ret; } else if (Object.prototype.toString.call(obj) === "[object Object]") { ret = {}; for (let i in obj) { ret[i] = this.cloneObj(obj[i]); } return ret; } else { return obj; } }, //添加表单 addForm() { let arr = this.cloneObj(this.personObj); console.log("arr", arr); this.List.push(arr); }, //提交表单 submit() { console.log("this.List", this.List); }, }, }; </script>
代码分析:
这里封装了一个深拷贝函数,每次点击添加表单时就会拷贝一份我们定义好的对象,注意这个对象是由我们初始表单的value值组合起来的,我们在最外层用v-for遍历数组List然后每次点击”添加表单”就往数组里push一个对象,最后点击”提交表单”按钮,打印this.List就能看到整个的数组对象了,我们来试一下,选择输入以下值:
控制台打印看下效果:
现在假如说有个需求是,指定添加几项表单,而不是点一次加一次表单,效果如下,有三个按钮,最开始显示一个表单
当我点击”3个”按钮的时候,界面总共有三个表单,如下图:
代码如下:
<template> <div> <div style="margin: 10px 0"> <el-button type="primary" @click="add(3)">3个</el-button> <el-button type="primary" @click="addForm">添加表单</el-button> <el-button type="primary" @click="submit">提交表单</el-button> </div> <div v-for="(item, index) in List" :key="index"> <el-form ref="form" label-width="80px"> <el-form-item label="直播平台"> <el-select v-model="item.platform" :key="index" placeholder="请选择直播平台" > <el-option :label="item2.platformName" v-for="(item2, index2) in platformNameList" :key="index2" :value="item2.platformValue" > </el-option> </el-select> </el-form-item> <el-form-item label="粉丝量"> <el-input v-model="item.fanMount" :key="index"></el-input> </el-form-item> <el-form-item label="平台ID"> <el-input v-model="item.platformId" :key="index"></el-input> </el-form-item> </el-form> </div> </div> </template> <script> export default { data() { return { title: "巡查内容页", personObj: { platform: "", fanMount: "", platformId: "", }, platformNameList: [ { platformName: "快手", platformValue: "1", }, { platformName: "抖音", platformValue: "2", }, { platformName: "淘宝", platformValue: "3", }, ], List: [ { platform: "", fanMount: "", platformId: "", }, ], }; }, methods: { cloneObj(obj) { let ret; if (Array.isArray(obj)) { //创建一个空数组 ret = []; for (let i = 0; i < obj.length; i++) { ret[i] = this.cloneObj(obj[i]); } return ret; } else if (Object.prototype.toString.call(obj) === "[object Object]") { ret = {}; for (let i in obj) { ret[i] = this.cloneObj(obj[i]); } return ret; } else { return obj; } }, add(a) { this.addForm(a); }, addForm(a) { let arr = this.cloneObj(this.personObj); console.log("arr", arr); this.List.push(arr); a--; if (a > 0) { this.addForm(a - 1); } }, submit() { console.log("this.list", this.List); }, }, }; </script> <style> </style>
代码分析如下:
点击按钮的add方法的时候传入总共的表单个数,然后在添加表单的方法addForm里用了自减和判断、递归来实现连续点击时的拷贝等。然后我们试一下效果
控制台打印看一下
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