vue 中使用echarts

前言：在vue2.0中使用百度echarts有三种解决方案。

一、原始方法直接使用

这样每次都要获取图表dom元素 然后通过setOption渲染数据，最后在mounted中初始化。很麻烦。

>
  
class="page">
    >
      
      class="chart3" :options="barOptions" />
      
      class="chart4" type="flex" justify="space-between">
        :span="8" class="chart">
          class="chart4_1" :options="piesOptions" />
        >
        :span="8" class="chart">
          class="chart4_1" :options="piesOptions" />
        >
        :span="8" class="chart">
          class="chart4_1" :options="piesOptions" />
        >
      >
    >
  >
>

<script>
export default {
  data() {
    return {
      barOptions: {
        color: ["#5094FF", "#64DAAC", "#FAC84A"],
        grid: {
          top: "15%",
          bottom: "20%",
          right: "5%",
          left: "5%"
        },
        tooltip: {},
        legend: {
          data: ["合格数", "超标数", "合格率", "超标率"],
          top: "0"
        },
        xAxis: {
          type: "category",
          data: ["04-13", "04-14", "04-15", "04-16", "04-17", "04-18", "04-19"]
        },
        yAxis: {
          // name: '合格率(%)',
          // nameLocation: 'middle',
          type: "value"
          // nameTextStyle: {
          //   fontSize: '0.072917rem',
          //   color: '#999999'
          // }
        },
        series: [
          {
            name: "合格数",
            type: "bar",
            barWidth: "15%",
            barGap: "5%",
            data: [20, 232, 441, 654, 770, 530, 410]
          },
          {
            name: "超标数",
            type: "bar",
            barWidth: "15%",
            data: [120, 482, 791, 834, 590, 930, 710]
          },
          {
            name: "合格率",
            type: "line",
            data: [420, 332, 291, 654, 590, 330, 810]
          },
          {
            name: "超标率",
            type: "line",
            data: [120, 232, 391, 854, 590, 730, 410]
          }
        ]
      },
      piesOptions: {
        color: ["#5094FF", "#64DAAC", "#FAC84A"],
        title: {
          text: "汽油柴油分布",
          top: "5%",
          left: "5%",
          textStyle: {
            fontSize: "0.072917rem",
            color: "#333333",
            fontStyle: "normal"
          }
        },
        grid: {
          top: "15%",
          bottom: "15%",
          right: "15%",
          left: "15%"
        },
        tooltip: {
          trigger: "item",
          formatter: "{a} 
{b} : {c} ({d}%)"
        },
        series: [
          {
            name: "气体值",
            type: "pie",
            radius: "80%",
            center: ["50%", "50%"],
            data: [
              { value: 50, name: "NOx超标" },
              { value: 30, name: "PM2.5超标" },
              { value: 20, name: "超标污染物" }
            ],
            label: {
              position: "inside",
              formatter: "{b} \n {c}({d}%)"
            },
            emphasis: {
              itemStyle: {
                shadowBlur: 10,
                shadowOffsetX: 0,
                shadowColor: "rgba(0, 0, 0, 0.5)"
              }
            }
          }
        ]
      }
    };
  }
};
>

三、使用v-charts

v-charts 是基于vue2二次封装的图表组件库，功能没有echarts多 但也够用了，官网很详细，这里用一个官网例子说明问题。

>
  :data="chartData" :settings="chartSettings">>
>

<script>
  export default {
    data () {
      this.chartSettings = {
        showLine: ['下单用户']
      }
      return {
        chartData: {
          columns: ['日期', '访问用户', '下单用户', '下单率'],
          rows: [
            { '日期': '1/1', '访问用户': 1393, '下单用户': 1093, '下单率': 0.32 },
            { '日期': '1/2', '访问用户': 3530, '下单用户': 3230, '下单率': 0.26 },
            { '日期': '1/3', '访问用户': 2923, '下单用户': 2623, '下单率': 0.76 },
            { '日期': '1/4', '访问用户': 1723, '下单用户': 1423, '下单率': 0.49 },
            { '日期': '1/5', '访问用户': 3792, '下单用户': 3492, '下单率': 0.323 },
            { '日期': '1/6', '访问用户': 4593, '下单用户': 4293, '下单率': 0.78 }
          ]
        }
      }
    }
  }
>

以上，可跟据需求选用，如果需求简单可直接用v-charts