vue2结合echarts实现数据排名列表——前端柱状进度条排行榜

写在前面，博主是个在北京打拼的码农，工作多年做过各类项目，最近心血来潮在这儿写点东西，欢迎大家多多指教。

数据排名列表——图表开发，动态柱状图表，排名图

直接搜到类似在线代码（数据列表--bar - category-work,grid直角坐标,legend,series-bar柱状图,toolbox工具栏,tooltip提示框 - makeapie echarts社区图表可视化案例），准备在此基础上向UI靠拢

全部代码：

 enableChart() {
      let that = this;
      // 启用表格----重组数据格式

      this.tableData = JSON.parse(JSON.stringify(this.chartData));
      if (this.tableData && this.tableData.length) {
        // this.tableData.push(this.allNumObj);
        this.tableData = [...this.tableData, this.benjiObj, this.allNumObj];
      }

      this.$nextTick(function() {
        const elPart = document.querySelectorAll("tr");
        elPart.forEach(a => {
          a.children[2].style.color = "#fd5702";
        });
      });

      this.$forceUpdate();
      //       if (["舆情办结率"].includes(this.typeName)) {
      // return;
      // // 舆情办结率没图表所以不刷新
      //             }
      //  if (["舆情办结率", "转办时效"].includes(this.typeName)) {
      //         this.titleStr = "均值";
      //       }else{
      //         this.titleStr = "合计";

      //       }
      // color: #fd5702;
      var myChart = echarts.init(document.getElementById("chartPart1"));
      var colorList = ["#FC0033", "#FD5702", "#FEB507", "#BBBBBB"];
      var datas = this.chartData.map(a => {
        return { value: a.nowInfoNum, name: a.addressName };
      });
      let junZhi = (
        this.chartData[0].nowInfoAllNum /
        (this.addressOption.length - 2)
      ).toFixed(2);
      if (this.loginUl.orgParentId != 0) {
        junZhi = (
          this.chartData[0].nowInfoAllNum /
          (this.addressOption.length - 1)
        ).toFixed(2);
      }
      if (this.loginUl.orgParentId != 7) {
        junZhi = (
          this.chartData[0].nowInfoAllNum / this.addressOption.length
        ).toFixed(2);
      }
      let maxArr = new Array(datas.length).fill(
        this.chartData[0] ? this.chartData[0].nowInfoAllNum : "暂无"
      );
      //合计值字段;

      let option = {
        tooltip: {
          trigger: "axis",
          axisPointer: {
            type: "none"
          },
          formatter: function(params, index) {
            return (
              params[0].name +
              "，位列第" +
              (params[0].dataIndex + 1) +
              "，" +
              params[0].seriesName +
              params[0].value +
              "<br>均值：" +
              junZhi
            );
          }
        },
        legend: {
          show: false
        },
        grid: {
          top: 30, //图表距离容器下面多少距离

          containLabel: true
        },

        xAxis: {
          show: false,
          type: "value"
        },
        yAxis: [
          {
            type: "category",

            inverse: true,
            axisLine: {
              show: false
            },
            axisTick: {
              show: false
            },
            axisPointer: {
              label: {
                show: false,
                margin: 20
              }
            },
            // itemGap: 10,
            data: datas.map(item => item.name),
            axisLabel: {
              // width:2000,    //网格宽度
              // height:'auto',   //网格高度
              margin: 140,
              fontSize: 16,
              align: "left",
              color: "#333",
              // offset: 100,  // 调整标签与刻度值的距离
              rich: {
                a1: {
                  color: "#fff",
                  backgroundColor: colorList[0],
                  width: 30,
                  height: 30,
                  align: "center",
                  borderRadius: 2
                },
                a2: {
                  color: "#fff",
                  backgroundColor: colorList[1],
                  width: 30,
                  height: 30,
                  align: "center",
                  borderRadius: 2
                },
                a3: {
                  color: "#fff",
                  backgroundColor: colorList[2],
                  width: 30,
                  height: 30,
                  align: "center",
                  borderRadius: 2
                },
                b: {
                  color: "#fff",
                  backgroundColor: colorList[3],
                  width: 30,
                  height: 30,
                  align: "center",
                  borderRadius: 2
                }
              },
              formatter: function(params) {
                var index = datas.map(item => item.name).indexOf(params);

                index = index + 1;

                let disposeText = params.length > 6 ? params + "..." : params;
                if (index - 1 < 3) {
                  return [
                    "{a" + index + "|" + index + "}" + "  " + disposeText
                  ].join("\n");
                } else {
                  return ["{b|" + index + "}" + "  " + disposeText].join("\n");
                }
              }
            }
          },
          {
            type: "category",
            inverse: true,
            axisTick: "none",
            axisLine: "none",
            show: true,
            data: datas.map(item => item.value),
            axisLabel: {
              show: false, //右侧百分比
              fontSize: 14,
              color: "#333",
              formatter: "{value}%"
            }
          }
        ],
        series: [
          {
            //   left: 100,
            // right: 0,
            // top:0,
            // bottom:0,
            z: 2,
            name: this.typeName,
            type: "bar",
            barWidth: 20,
            zlevel: 1,
            data: datas.map((item, i) => {
              let colorStr = "";
              if (that.checkName === item.name) {
                colorStr = "#009b63";
              } else {
                if (i > 3) {
                  colorStr = colorList[3];
                } else {
                  colorStr = colorList[i];
                }
              }
              let itemStyle = {
                color: colorStr,
                barBorderRadius: 30
              };
              //设置选中的柱子颜色
              return {
                value: item.value,
                itemStyle: itemStyle
              };
            }),
            label: {
              show: false,
              position: "right",
              color: "#333333",
              fontSize: 14,
              offset: [10, 0]
            }
          },
          {
            name: "合计",
            type: "bar",
            barWidth: 20,
            barGap: "-100%",
            itemStyle: {
              normal: {
                color: "#EEEEEE",
                barBorderRadius: 30
              },
              emphasis: {
                // 高亮状态下的样式
                color: "#EEEEEE"
              }
            },
            data: maxArr
          }
        ]
      };

      var worldMapContainer = document.getElementById("chartPart1");
      //用于使chart自适应高度和宽度,通过外部元素高宽计算容器高宽 - 50
      worldMapContainer.style.width =
        document.getElementsByClassName("left")[0].clientWidth + 100 + "px";
      let H = 400;
      if (60 * this.chartData.length > 400) {
        H = 60 * this.chartData.length;
      }
      document.getElementsByClassName("left")[0].style.height = H + "px";
      worldMapContainer.style.height = H + "px";
      //设置容器高宽
      myChart.setOption(option);
      myChart.resize();
      this.$forceUpdate();
    },

调整echarts图的缩放大小

echarts如何改变图形的大小

echarts 放大与缩放的功能

echarts图表的大小调整的解决方案

echarts如何改变图形的大小

echarts的图表撑满整个容器 echarts图大小设置

那么怎么真真正正的解决上述几个问题呢

当我们直接拿别人二次开发过的echarts图，发现有点无从下手，搜索后也没发现有啥好属性，某处边距就是很宽看着难受

我的解决方法是

父元素相对定位，子元素绝对定位，直接调整子元素Echarts图的宽高来缩放图表，通过定位，让框与框的间距消失

改动前：

改动后：



  .left {
   
    position: relative;
.chartPartEl {
  position: absolute !important;
  top: 0;
  left: -90px;
}
  }



 <div class="left" v-show="isUnfold">
          <template
            v-if="chartData && chartData.length && chartData[0].nowInfoAllNum"
          >
            <p><button class="green" @click="handleOk()">下载图片</button></p>
            <div
              class="chartPartEl"
              id="chartPart1"
              ref="chartPart1"
              style="width: 500px;height: 500px;"
            ></div>
          </template>
          <p v-else class="notData">暂无数据</p>
        </div>

最终效果：

本次开发中碰到的有意思的文章：

1.ECharts 高度宽度自适应（转载） - hao_1234_1234 - 博客园

  var worldMapContainer = document.getElementById("chartPart1");

      //用于使chart自适应高度和宽度,通过外部元素高宽计算容器高宽
      var resizeWorldMapContainer = function() {
        worldMapContainer.style.width =
          document.getElementsByClassName("left")[0].clientWidth - 100 + "px";
        worldMapContainer.style.height =
          document.getElementsByClassName("content")[0].clientWidth + "px";
      }; //设置容器高宽
      resizeWorldMapContainer();
      myChart.setOption(option);
      myChart.resize();

3.javaScript实用方法第三篇（.fill .filter .find）_js .fill-CSDN博客

4.Error in callback for watcher “options“: “TypeError:Cannot read properties of null (reading ‘level‘)_error in callback for watcher "options": "typeerro-CSDN博客

5. 解决前代码：根据父元素可视高度实现


      //用于使chart自适应高度和宽度,通过外部元素高宽计算容器高宽
      var resizeWorldMapContainer = function() {
        worldMapContainer.style.width =
          document.getElementsByClassName("left")[0].clientWidth - 100 + "px";
        worldMapContainer.style.height =
          document.getElementsByClassName("content")[0].clientWidth + "px";
      }; //设置容器高宽
      resizeWorldMapContainer();

解决后代码：根据数据数量多少决定

  var worldMapContainer = document.getElementById("chartPart1");
      //用于使chart自适应高度和宽度,通过外部元素高宽计算容器高宽
      // var resizeWorldMapContainer = function() {
        worldMapContainer.style.width =
          document.getElementsByClassName("left")[0].clientWidth - 100 + "px";
          let H=400;
          if(60*this.chartData.length>400){
H=60*this.chartData.length;
          }
        worldMapContainer.style.height =H+'px';
          // document.getElementsByClassName("left")[0].clientHeight + "px";
      // }; //设置容器高宽
      // resizeWorldMapContainer();