【vue2绘制echarts环状图】vue2使用echarts绘制环状图

效果图：

鼠标悬浮的效果图：

---

1：安装echarts

yarn add echarts@5.3.2
或
npm install echarts@5.3.2 --save
1
2
3

2.局部引入使用

在vue页面引入

<template>
  <div>
    <div
      ref="myChart"
      style="
         {
          width: 400px;
          height: 350px;
        }
      "
    ></div>
  </div>
</template>

<script>
import * as echarts from "echarts";

export default {
  name: "Home",
  data() {
    return {
      // 总数
      countCharData: 0,
      // 存放echarts组装的数据
      echartsData: [],
      // 模拟的数据
      data: [
        {
          rankNo: 1,
          companyCode: "1",
          companyName: "test1",
          companyNickName: "test1",
          count: 7921,
          percentage: 63.79,
        },
        {
          rankNo: 2,
          companyCode: "142",
          companyName: "test12",
          companyNickName: "test12",
          count: 1759,
          percentage: 14.16,
        },
        {
          rankNo: 3,
          companyCode: "24",
          companyName: "test13",
          companyNickName: "test13",
          count: 1106,
          percentage: 8.91,
        },
        {
          rankNo: 4,
          companyCode: "8",
          companyName: "test14",
          companyNickName: "test14",
          count: 899,
          percentage: 7.24,
        },
        {
          rankNo: 5,
          companyCode: "21",
          companyName: "test15",
          companyNickName: "test15",
          count: 422,
          percentage: 3.4,
        },
        {
          rankNo: 6,
          companyCode: "other",
          companyName: "其他",
          companyNickName: "其他",
          count: 311,
          percentage: 2.5,
        },
      ],
    }
  },
  created() {
    this.init_load();
  },
  // 销毁实例
  disposeChart() {
    echarts.dispose(this.$refs.myChart);
  },
  methods: {
    // 初始化
    async init_load() {
      // 这里this.data原本是请求接口的数据，现在写dom我直接把data数据写死
      this.data.forEach((item, i) => {
        this.countCharData += item.count;
        this.echartsData.push({
          value: item.count,
          name: item.companyNickName,
          itemStyle: {
            color: this.handChartColor(i),
          },
        });
      });
      await this.drawChart();
    },
    drawChart() {
      // 基于准备好的dom，初始化echarts实例  这个和上面的main对应
      echarts.init(this.$refs.myChart).setOption({
        title: {
          text: this.formatNumber(this.countCharData), //环状图中间显示数量的主标题
          subtext: "资源总数", //副标题
          left: "38%",
          top: "28%",
          textAlign: "center",
          // 主标题的颜色
          textStyle: { 
            color: "#000",
            fontSize: 22,
            align: "center",
          },
          // 副标题的颜色
          subtextStyle: {
            color: "#86909C",
            fontSize: 16,
            align: "center",
          },
        },
        tooltip: {
          trigger: "item",
        },

        series: [
          {
            name: "资源数",
            type: "pie",
            radius: ["45%", "55%"],// 环状的环粗细
            center: ["40%", "35%"],
            data: this.echartsData, //数据
            // 这里是不显示环状图外面的线
            label: {
              show: false,
              position: "center",
            },
            labelLine: {
              length: 5,
              length2: 0,
              maxSurfaceAngle: 80,
            },
          },
        ],
      });
    },
    //数字每三位加逗号的方法
    formatNumber(num) {
      return Number(num).toLocaleString();
    },
    // 我这里只展示前六条数据，所有只给六个颜色
    handChartColor(i) {
      let color = "";
      switch (i) {
        case 0:
          color = "#B4ADF3";
          break;
        case 1:
          color = "#FFA58A";
          break;
        case 2:
          color = "#D91A45";
          break;
        case 3:
          color = "#FE59A5";
          break;
        case 4:
          color = "#FEB028";
          break;
        default:
          color = "#737CCB";
          break;
      }
      return color;
    },
  },
};
</script>

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181

3.注意点

1.注意安装的echarts的版本，我这里安装的是5.3.2

2.echarts官网地址(如果打不开，请使用科学上网)：https://echarts.apache.org/handbook/zh/get-started/

3.需要更改echarts的大小样式，只能在div里加style，如果使用class会无效果