目錄

• 一、序言
• 1、業(yè)務(wù)需求
• 2、目標(biāo)效果
• 二、原理
• 三、全部代碼

一、序言

1、業(yè)務(wù)需求

表單項(xiàng)填寫(xiě)了，進(jìn)度條就增加相應(yīng)的比例，表單項(xiàng)未填寫(xiě)，進(jìn)度條就 減少相應(yīng)的比例

2、目標(biāo)效果

二、原理

1、如何監(jiān)測(cè)表單項(xiàng)是否有值，可以專(zhuān)門(mén)用對(duì)象存儲(chǔ)進(jìn)度條增幅比例。如果表單項(xiàng)有值則存儲(chǔ)，沒(méi)有值則賦值為0，然后表單項(xiàng)使用@change事件監(jiān)聽(tīng)表單項(xiàng)是否變化，然后調(diào)用一個(gè)公共的計(jì)算進(jìn)度條的方法，這個(gè)方法去遍歷calculateIntegrityForm對(duì)象的key對(duì)應(yīng)的value值，然后累加這個(gè)value值，最后賦值給進(jìn)度條

form: {    // 存儲(chǔ)表單項(xiàng)的表單    name: "",    region: "",    type: [],    resource: "",},calculateIntegrityForm: {    // 存儲(chǔ)進(jìn)度條比例的表單    name: 0,    region: 0,    type: 0,    resource: 0,}

    // 監(jiān)聽(tīng)特殊資源變化    resourceChangeFn(val) {      this.form.resource = val;      this.updateProgress("resource", 25);    },    // 監(jiān)聽(tīng)活動(dòng)性質(zhì)變化    typeChangeFn(val) {      this.form.type = val;      this.updateProgress("type", 25);    },    // 監(jiān)聽(tīng)活動(dòng)區(qū)域變化    regionChangeFn(val) {      this.form.region = val;      this.updateProgress("region", 25);    },    // 監(jiān)聽(tīng)活動(dòng)名稱(chēng)變化    nameChangeFn(val) {      this.form.name = val;      this.updateProgress("name", 25);    },    // 監(jiān)聽(tīng)進(jìn)度條變化    updateProgress(key, num) {      let sum = 0;      if (this.isEmpty(this.form[key])) {// 監(jiān)聽(tīng)的元素為空this.calculateIntegrityForm[key] = 0;      } else {// 監(jiān)聽(tīng)的元素不為空this.calculateIntegrityForm[key] = num;      }      for (let i in this.calculateIntegrityForm) {sum += this.calculateIntegrityForm[i];      }      this.percentage = sum;    },

2、如何判斷對(duì)象、數(shù)組、字符串為空

    // 判斷變量字符串、數(shù)組、對(duì)象是否為空的公共方法    isEmpty(str) {      let thisType = typeof str;      if (str === "" || str === null || str === undefined) {// null、undefined// 這里之所以用全等于，因?yàn)椋?/ 1.JS里，‘" == 0 == [],會(huì)被判斷成相同，而下方針對(duì)數(shù)字0和空數(shù)組做出單獨(dú)處理，故此處只需要單獨(dú)判斷‘"http:// 2.JS里，typeof null == object,為簡(jiǎn)化下方object處判斷邏輯，故此處需要用全等判斷nullreturn true;      } else if (thisType == "string" && str.replace(/(^\s*)|(\s*$)/g, "").length == 0) {//stringreturn true;      } else if (thisType == "number" && isNaN(str) || str == 0) {//numberreturn true;      } else if (thisType == "object") {if (str instanceof Array) {// 數(shù)組為空判斷  return str.length == 0;} else { // 對(duì)象為空判斷  return JSON.stringify(str) == "{}";}      }      return false;// 傳入str不為空    }

3、for in用于對(duì)象的遍歷，form[key]用于對(duì)象賦值

三、全部代碼

本項(xiàng)目只是一個(gè)demo，我全部寫(xiě)在App.vue中，只安裝了一個(gè)elementui插件

<template>  <div id="app">    <el-form :model="form" ref="form" label-width="100px">      <el-form-item label="活動(dòng)名稱(chēng)"><el-input v-model="form.name" @change="nameChangeFn" clearable></el-input>      </el-form-item>      <el-form-item label="活動(dòng)區(qū)域"><el-select v-model="form.region" placeholder="請(qǐng)選擇活動(dòng)區(qū)域" @change="regionChangeFn" clearable>  <el-option label="區(qū)域一" value="shanghai"></el-option>  <el-option label="區(qū)域二" value="beijing"></el-option></el-select>      </el-form-item>      <el-form-item label="活動(dòng)性質(zhì)"><el-checkbox-group v-model="form.type" @change="typeChangeFn">  <el-checkbox label="美食/餐廳線上活動(dòng)" name="type"></el-checkbox>  <el-checkbox label="地推活動(dòng)" name="type"></el-checkbox>  <el-checkbox label="線下主題活動(dòng)" name="type"></el-checkbox>  <el-checkbox label="單純品牌曝光" name="type"></el-checkbox></el-checkbox-group>      </el-form-item>      <el-form-item label="特殊資源"><el-radio-group v-model="form.resource" @change="resourceChangeFn">  <el-radio label="線上品牌商贊助"></el-radio>  <el-radio label="線下場(chǎng)地免費(fèi)"></el-radio></el-radio-group>      </el-form-item>      <el-form-item label="進(jìn)度條"><el-progress :text-inside="true" :stroke-width="26" :percentage="percentage"></el-progress>      </el-form-item>    </el-form>  </div></template><script>export default {  name: "App",  data() {    return {      percentage: 0, // 百分比      form: {name: "",region: "",type: [],resource: "",      },      calculateIntegrityForm: {name: 0,region: 0,type: 0,resource: 0,      }    }  },  methods: {    // 監(jiān)聽(tīng)特殊資源變化    resourceChangeFn(val) {      this.form.resource = val;      this.updateProgress("resource", 25);    },    // 監(jiān)聽(tīng)活動(dòng)性質(zhì)變化    typeChangeFn(val) {      this.form.type = val;      this.updateProgress("type", 25);    },    // 監(jiān)聽(tīng)活動(dòng)區(qū)域變化    regionChangeFn(val) {      this.form.region = val;      this.updateProgress("region", 25);    },    // 監(jiān)聽(tīng)活動(dòng)名稱(chēng)變化    nameChangeFn(val) {      this.form.name = val;      this.updateProgress("name", 25);    },    // 監(jiān)聽(tīng)進(jìn)度條變化    updateProgress(key, num) {      let sum = 0;      if (this.isEmpty(this.form[key])) {// 監(jiān)聽(tīng)的元素為空this.calculateIntegrityForm[key] = 0;      } else {// 監(jiān)聽(tīng)的元素不為空this.calculateIntegrityForm[key] = num;      }      for (let i in this.calculateIntegrityForm) {sum += this.calculateIntegrityForm[i];      }      this.percentage = sum;    },    // 判斷變量字符串、數(shù)組、對(duì)象是否為空的公共方法    isEmpty(str) {      let thisType = typeof str;      if (str === "" || str === null || str === undefined) {// null、undefined// 這里之所以用全等于，因?yàn)椋?/ 1.JS里，‘" == 0 == [],會(huì)被判斷成相同，而下方針對(duì)數(shù)字0和空數(shù)組做出單獨(dú)處理，故此處只需要單獨(dú)判斷‘"http:// 2.JS里，typeof null == object,為簡(jiǎn)化下方object處判斷邏輯，故此處需要用全等判斷nullreturn true;      } else if (thisType == "string" && str.replace(/(^\s*)|(\s*$)/g, "").length == 0) {//stringreturn true;      } else if (thisType == "number" && isNaN(str) || str == 0) {//numberreturn true;      } else if (thisType == "object") {if (str instanceof Array) {// 數(shù)組為空判斷  return str.length == 0;} else { // 對(duì)象為空判斷  return JSON.stringify(str) == "{}";}      }      return false;// 傳入str不為空    }  },}</script><style>.el-form {  position: absolute;  top: 50%;  left: 50%;  transform: translate(-50%, -50%);}#app {  height: 100%;}</style>

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