Vue?echarts實例項目地區(qū)銷量趨勢堆疊折線圖實現(xiàn)詳解

更新時間：2022年09月26日 08:45:19 作者：benlalagang

Echarts，它是一個與框架無關(guān)的 JS 圖表庫，但是它基于Js，這樣很多框架都能使用它，例如Vue，估計IONIC也能用，因為我的習(xí)慣，每次新嘗試做一個功能的時候，總要新創(chuàng)建個小項目，做做Demo

最終效果如圖

組件結(jié)構(gòu)設(shè)計

外部 Trendpage.vue

<!--針對于/trendpage 這條路徑顯示 測試顯示組件-->
<template>
  <div class="comP1">
    <Trend></Trend>
  </div>
</template>
<script>
  import Trend from "@/components/Trend";
  export default {
    name: "TrendPage",
    components:{Trend}
  }
</script>
<style scoped>
</style>

內(nèi)部Trend.vue

<!-- 顯示地區(qū)銷量趨勢的折線圖表 -->
<template>
<div class="comP2" ref="trend_1"></div>
</template>
<script>
export default {
data () {
return {}
},
methods: {}
}
</script>
<style lang="less" scoped>
</style>

初始化圖表+數(shù)據(jù)的獲取+更新圖表

設(shè)置好這些函數(shù) 在mounted生命周期內(nèi)調(diào)用

    mounted() {
      // 渲染DOM元素之后 初始化圖表實例 請求數(shù)據(jù) 監(jiān)聽頁面尺寸變化
      this.initChart()
       this.getData()  // 請求數(shù)據(jù)
      // 監(jiān)聽圖表尺寸發(fā)生變化時的 處理函數(shù)   自適應(yīng)尺寸
      window.addEventListener('resize',this.screenAdapter)
      this.screenAdapter()
    },

找到盒子初始化圖表、這里只是簡單設(shè)置的直角坐標(biāo)系

      initChart(){
        this.chartInstance = this.$echarts.init(this.$refs.trend_1,this.theme)
        const initOption = {
          grid:{
            left:'3%',
            top:'35%',
            right:'4%',
            bottom:'1%',
            containLabel:true
          },
          tooltip:{ // 鼠標(biāo)懸浮時的提示框
            trigger:'axis'
          },
          legend:{
            left: 20,
            top: '15%',
            icon:'circle'
          },
          xAxis: {
            type:'category',
            boundaryGap:false // 緊貼兩側(cè)邊緣
          },
          yAxis:{
            type:'value'
          }
        }
        this.chartInstance.setOption(initOption)
      },

發(fā)送請求、獲取數(shù)據(jù)

      getData(){ 
        const {data:res} = await this.$http.get('trend')
        this.allData = res
        this.updateChart()
      },

請求過來的數(shù)據(jù)：

{
    "map": {
        "title": "地區(qū)銷量趨勢",
        "base": 310,
        "unit": "萬",
        "data": [{
            "name": "上海",
            "data": ["155.13","154.65","171.46","164.38","237.23","300.65","240.29","232.07","193.31","136.70","48.64","90.20"]
        }, {
            "name": "北京",
            "data": ["86.25","33.80","145.58","21.79","176.09","132.41","291.05","191.89","151.54","94.25","141.75","157.14"]
        }, {
            "name": "深圳",
            "data": ["143.94","186.29","183.64","251.48","195.48","152.16","52.47","184.12","203.79","39.16","56.37","161.64"]
        }, {
            "name": "廣州",
            "data": ["57.60","77.61","307.24","165.05","175.41","276.88","269.04","296.11","105.31","283.39","134.08","265.38"]
        }, {
            "name": "重慶",
            "data": ["200.82","215.56","249.80","222.67","216.98","60.12","309.68","273.35","150.99","251.97","26.15","186.99"]
        }]
    },
    "seller": {
        "title": "商家銷量趨勢",
        "base": 120,
        "unit": "萬",
        "data": [{
            "name": "商家1",
            "data": ["33.00","86.07","28.77","34.29","102.45","0.30","50.50","21.70","25.41","25.71","66.90","63.29"]
        }, {
            "name": "商家2",
            "data": ["12.83","102.42","37.37","95.55","45.45","112.72","113.53","106.41","75.67","113.91", "37.32", "28.04"]
        }, {
            "name": "商家3",
            "data": ["73.54","40.92","89.81","113.41","76.34","107.15","55.61","0.33","106.29","78.30","98.05","38.67"]
        }, {
            "name": "商家4",
            "data": ["47.19","73.57","44.60","84.03","62.82","15.65","64.72","88.98","29.25","5.41","79.11","118.46"]
        }, {
            "name": "商家5",
            "data": ["74.84","116.45","107.69","11.03","17.31","42.22","97.60","108.64","43.87","110.65","5.96","38.41"]
        }]
    },
    "commodity": {
        "title": "商品銷量趨勢",
        "base": 50,
        "unit": "萬",
        "data": [{
            "name": "女裝",
            "data": ["47.71","13.34","19.30","7.93","41.93","23.01","22.63","26.91","0.62","39.23","48.74","29.48"]
        }, {
            "name": "手機數(shù)碼",
            "data": ["46.66","46.52","23.65","1.73","44.26","47.07","17.86","40.20","3.78","31.46","28.01","8.63"]
        }, {
            "name": "男裝",
            "data": ["26.98","30.71","42.59","29.50","26.86","17.65","30.15","15.85","9.28","30.20","32.35","34.46"]
        }, {
            "name": "大家電",
            "data": ["20.26","46.23","43.84","46.75","28.29","32.36","45.30","16.73","40.40","45.07","29.86","41.92"]
        }, {
            "name": "美妝護(hù)膚",
            "data": ["7.58","23.66","39.78","30.20","25.72","36.20","47.55","35.39","27.85","37.56","16.91", "3.91"]
        }]
    },
    "common": {
        "month": ["一月", "二月", "三月", "四月", "五月", "六月", "七月", "八月", "九月", "十月", "十一月", "十二月"]
    },
    "type": [{
        "key": "map",
        "text": "地區(qū)銷量趨勢"
    }, {
        "key": "seller",
        "text": "商家銷量趨勢"
    }, {
        "key": "commodity",
        "text": "商品銷量趨勢"
    }]
}

數(shù)據(jù)請求過來后在進(jìn)行相應(yīng)處理渲染圖表

data中預(yù)留的變量：

data(){
  return{
    chartInstance:null,// 預(yù)留初始化實例對象
    allData:null, // 服務(wù)器請求過來的數(shù)據(jù)
    showChoice:false, // 是否顯示可選項
    choiceType:'map', // 顯示的數(shù)據(jù)類型
    titleFontSize:0 // 指明標(biāo)題的字體
  }
},

1.準(zhǔn)備好兩個數(shù)組顏色透明度 0.5 ->0.1

2.抽取時間軸的數(shù)據(jù)

3.抽取組合 series 系列的數(shù)組

4.抽取 legend 分類提示

5.重新生成 option 調(diào)用 setOption 渲染圖表

      updateChart(){
        // 數(shù)據(jù)更新時 重新渲染
        // 預(yù)設(shè)半透明顏色的值
        const colorArr1 = [
          'rgba(11,168,44,0.5)',
          'rgba(44,110,255,0.5)',
          'rgba(22,242,217,0.5)',
          'rgba(254,33,30,0.5)',
          'rgba(250,105,0,0.5)'
        ]
        // 預(yù)設(shè)全透明顏色的值
        const colorArr2 = [
          'rgba(11,168,44,0.1)',
          'rgba(44,110,255,0.1)',
          'rgba(22,242,217,0.1)',
          'rgba(254,33,30,0.1)',
          'rgba(250,105,0,0.1)'
        ]
        // 處理請求過來的 this.allData 數(shù)據(jù) 直接用變量 導(dǎo)進(jìn)設(shè)置中
        const timeArr = this.allData.common.month // 類目軸的月份
        const valueArr = this.allData[this.choiceType].data // 數(shù)值軸的數(shù)據(jù)
        const seriesArr = valueArr.map((item,index) => {
          return {
            type:'line', // 類型是折線圖
            data:item.data, // 數(shù)據(jù)是每一項的data
            stack:this.choiceType, // 設(shè)置成堆疊圖一樣的字符串就可以
            name:item.name, // 每一項的提示 name
            // 每一項面積顏色的設(shè)置 運用到 上面定義的兩個數(shù)組
            areaStyle:{
              color:new this.$echarts.graphic.LinearGradient(0,0,0,1,[
                {
                  offset:0,
                  color:colorArr1[index]
                },
                {
                  offset:1,
                  color:colorArr2[index]
                }
              ])
            }
          }
        })
        const legendArr = valueArr.map(item => {
          return item.name
        })
        const dataOption = {
          xAxis: {
            data:timeArr
          },
          legend:{
            data:legendArr
          },
          series:seriesArr
        }
        this.chartInstance.setOption(dataOption)
      },

尺寸變化的適配-第三篇文章已經(jīng)詳細(xì)講過

      screenAdapter(){
        // 頁面分辨率發(fā)生改變時 重新渲染
        this.titleFontSize = this.$refs.trend_1.offsetWidth / 100 * 3.6
        const adapterOption = {
          // legend 是提示類目的文字 可以總的設(shè)置 也可以在單獨的 series 里設(shè)置
          legend: {
            itemWidth: this.titleFontSize,
            itemHeight: this.titleFontSize,
            itemGap: this.titleFontSize,
            textStyle: {
              fontSize: this.titleFontSize / 2
            }
          }
        }
        this.chartInstance.setOption(adapterOption)
        this.chartInstance.resize()
      },

標(biāo)題顯示以及對于數(shù)據(jù)的切換操作

請求過來的數(shù)據(jù)當(dāng)中有三種類型 map seller commodity 默認(rèn)是 map

在template 當(dāng)中添加標(biāo)題選擇模塊附加一定的樣式使得標(biāo)題顯示在對應(yīng)的位置

整體的位置由title 樣式?jīng)Q定動態(tài)樣式 comStyle 會隨著窗口變化和主題切換而改動
showTitle 根據(jù)this.choiceType 動態(tài)決定標(biāo)題
icon-font 字體圖標(biāo) 小箭頭點擊切換下拉標(biāo)題的選擇
v-for 渲染下拉標(biāo)題過濾掉當(dāng)前選擇的標(biāo)題
為每一小項添加點擊事件傳入對應(yīng)的key 更新this.choiceType 后重新渲染圖標(biāo) 并隱藏下拉

<template>
  <div class="comP3">
    <div class="title" :style="comStyle">
      <span>{{'▎ ' + showTitle}}</span>
      <span class="iconfont title-icon" :style="comStyle" @click="showChoice = !showChoice">&#xe6eb;</span>
      <div class="select-con"
           :style="theme === 'chalk' ? 'background-color: #222733;' : 'background-color: #ffffff;'"
           v-show="showChoice">
        <div class="select-item" :style="marginStyle" v-for="item in selectTypes" :key="item.key" @click="handleSelect(item.key)">
          {{item.text}}
        </div>
      </div>
    </div>
    <div class="comP2" ref="trend_1"></div>
  </div>
</template>
<style scoped lang="less">
  .title {
    position: absolute;
    left: 20px;
    top: 20px;
    z-index: 10;
    cursor: pointer;
    user-select: none;
    color: white;
  .title-icon {
    margin-left: 10px;
  }
  .select-con {
    /*background-color: #222733;*/
  }
  }
</style>

與之對應(yīng)的計算屬性和方法：

    computed:{
      ...mapState(['theme']),
      // 準(zhǔn)備遍歷選項的 元數(shù)據(jù)
      selectTypes(){
        if (!this.allData){
          return []
        }else {
          return this.allData.type.filter(item =>{
            return item.key !== this.choiceType
          })
        }
      },
      // 顯示當(dāng)前選中的標(biāo)題
      showTitle(){
        if(!this.allData){
          return ''
        }else {
          return this.allData[this.choiceType].title
        }
      },
      // 設(shè)置給標(biāo)題的樣式
      comStyle(){
        return `font-size:${this.titleFontSize}px;color:${getThemeValue(this.theme).titleColor}`
      },
      marginStyle(){
        return `padding-left:${this.titleFontSize}px`
      },
    },
methods:{
      handleSelect(currentType){
        this.choiceType = currentType
        this.updateChart()
        this.showChoice = false
      }
}

到此這篇關(guān)于Vue echarts實例項目地區(qū)銷量趨勢堆疊折線圖實現(xiàn)詳解的文章就介紹到這了,更多相關(guān)Vue echarts堆疊折線圖內(nèi)容請搜索腳本之家以前的文章或繼續(xù)瀏覽下面的相關(guān)文章希望大家以后多多支持腳本之家！

您可能感興趣的文章: