Vue中的echarts图表怎么实现loading效果

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echarts图表实现loading效果

main.js 中配置Vue属性ecahrts

// 引入echarts
import echarts from 'echarts'
Vue.prototype.$echarts = echarts

• data() 初始化数据调用数据

• mounted() 周期函数内获取画布节点,并且调用加载loading和图表渲染

• computed计算属性内定义echarts渲染内容以及数据请求

当服务器返回数据 hideLoading()

注意：loading方法要定义在计算属性的get方法中,set可以不做任何定义。这样图表于loading样式在画布上不会冲突

    <template>
        <div>
            <div class="echarts-wrap">
                <div id="dev-echarts"></div>
            </div>
        </div>
    </template>

    <script>
        export default {
            name: "echarts",
            data() {
                return {
                    one: [],
                    two: [],
                    three: [],
                    four: []
                }
            },
            mounted() {
                this.echartsG = this.$echarts.init(document.getElementById('dev-echarts'), 'dark');
                this.loading
                this.initDrawDevEchart
            },
            computed: {
                initDrawDevEchart() {
                    this.$axios.get("getEchartsUrl", {
                        params: {
                            id: 1
                        }
                    }).then((response) => {
                        this.one= response.data.one
                        this.two= response.data.two
                        this.three= response.data.three
                        this.xAxis= response.data.xaxis
    
                        this.echartsG.hideLoading()
                        let optionG = {
                            backgroundColor: 'rgba(128, 128, 128, 0)',
                            title: {
                                text: 'loading效果演示',
                            },
                            dataZoom: {},
                            tooltip: {
                                trigger: 'axis'
                            },
                            legend: {
                                data: ['一', '二', '三']
                            },
                            xAxis: {
                                type: 'category',
                                // 调整柱状图位置
                                boundaryGap: true,
                                data: this.xAxis
                            },
                            yAxis: {
                                type: 'value',
                                axisLabel: {
                                    formatter: '{value}'
                                }
                            },
                            series: [
                                {
                                    name: '一',
                                    type: 'bar',
                                    data: this.one,
                                },
                                {
                                    name: '二',
                                    type: 'bar',
                                    data: this.two
                                },
                                {
                                    name: '三',
                                    type: 'bar',
                                    data: this.three
                                }
                            ]
                        };
                        this.echartsG.setOption(optionG);
                    }).catch((err => {
                        console.log(err)
                    }))
    
                },
                loading: {
                    get: function () {
                        this.echartsG.setOption({
                            backgroundColor: 'rgba(128, 128, 128, 0)',
                            legend: {
                                data: ['一', '二', '三']
                            },
                            xAxis: {
                                type: 'category',
                                boundaryGap: true,
                                data: []
                            },
                            yAxis: {
                                type: 'value',
                                axisLabel: {
                                    formatter: '{value}'
                                }
                            },
                            series: [
                                {
                                    name: '一',
                                    type: 'bar',
                                    data: []
                                },
                                {
                                    name: '二',
                                    type: 'bar',
                                    data: []
                                },
    
                                {
                                    name: '三',
                                    type: 'bar',
                                    data: []
                                }
                            ]
    
                        });
                        this.echartsG.showLoading({
                            text: '统计中，请稍候...'
                            , maskColor: 'rgba(3,3,8,0.5)',
                            textColor: '#fff600'
                        });
                    },
                    set(e) {
                    }
                }
            }
        }
</script>

Vue使用echarts图表总结

今天在写后台项目的时候，使用echarts来绘制图表。下面来说说怎么使用echarts。

echarts地址：https://echarts.apache.org/zh/index.html

效果：

代码：

在vue项目中使用echarts图表的步骤：

安装echarts依赖

npm install echarts -S

或者使用淘宝的镜像

npm install -g cnpm --registry=https://registry.npm.taobao.org
cnpm install echarts -S

创建图表

一、全局引入

在main.js中

// 引入echarts
import echarts from 'echarts'
Vue.prototype.$echarts = echarts

二、局部引入（在需要的页面中引入）

import echarts from "echarts";

在页面中的使用（在这里我用的局部引入）

完整的代码：

<template>
  <div>
    <!-- 面包屑 -->
    <BreadCrumb level1="数据统计" level2="数据报表"></BreadCrumb>
    <!-- 内容 -->
    <el-card >
      <!-- 为Echarts准备一个Dom -->
      <div id="main" ></div>
    </el-card>
  </div>
</template>

<script>
import { getReports } from "../../http/api";
import echarts from "echarts";
import _ from "lodash";
export default {
  data() {
    return {
      // 需要合并的数据
      options: {
        title: {
          text: "用户来源"
        },
        tooltip: {
          trigger: "axis",
          axisPointer: {
            type: "cross",
            label: {
              backgroundColor: "#E9EEF3"
            }
          }
        },
        grid: {
          left: "3%",
          right: "4%",
          bottom: "3%",
          containLabel: true
        },
        xAxis: [
          {
            boundaryGap: false
          }
        ],
        yAxis: [
          {
            type: "value"
          }
        ]
      }
    };
  },
  mounted() {
    this.reports();
  },
  methods: {
    async reports() {
      var myChart = echarts.init(document.getElementById("main"));
      const res = await getReports();
      console.log(res);
      const resultJieg = _.merge(res.result, this.options);
      //   展示数据
      myChart.setOption(resultJieg);
    }
  }
};
</script>
<style></style>

解释：

1、需要在页面上给一个挂载点

		<!-- 为Echarts准备一个Dom -->
      <div id="main" ></div>

2、在data里面定义一下

// 需要合并的数据
      options: {
        title: {
          text: "用户来源"
        },
        tooltip: {
          trigger: "axis",
          axisPointer: {
            type: "cross",
            label: {
              backgroundColor: "#E9EEF3"
            }
          }
        },
        grid: {
          left: "3%",
          right: "4%",
          bottom: "3%",
          containLabel: true
        },
        xAxis: [
          {
            boundaryGap: false
          }
        ],
        yAxis: [
          {
            type: "value"
          }
        ]
      }

3、初始化数据

  mounted() {
    this.reports();
  },
  methods: {
    async reports() {
    //获取在页面中挂载的数据
      var myChart = echarts.init(document.getElementById("main"));
      //调用接口（即后台返回的数据）
      const res = await getReports();
      console.log(res);
      //使用lodash来合并数据
      const resultJieg = _.merge(res.result, this.options);
      //   展示数据
      myChart.setOption(resultJieg);
    }
  }

总结一下：

在vue中使用echarts图表，分为二步：

1.在页面中给图表一个挂载的元素。

2.在mounted的函数里初始化数据。

• 通过echarts.init来拿到页面中挂载的节点。

• 调用数据

• 最后通过setOption来展示数据。

感谢各位的阅读，以上就是“Vue中的echarts图表怎么实现loading效果”的内容了，经过本文的学习后，相信大家对Vue中的echarts图表怎么实现loading效果这一问题有了更深刻的体会，具体使用情况还需要大家实践验证。这里是亿速云，小编将为大家推送更多相关知识点的文章，欢迎关注！