vue项目 echarts图表多屏显示（分页动画的实现）

具体效果如下

soogif (2).gif

具体代码如下

<template>
  <div class="container">
    <div class="echarts" ref="echarts"></div>
  </div>
</template>

<script>
import echarts from "echarts";
export default {
  name: "safe",
  data() {
    return {
      chartInstance: null,
      allData: null, //服务器返回的数据
      currentPage: 1, //当前显示页数
      totalPage: 0, // 共有多少页
      timerId: null, // 定时器标识
    };
  },
  mounted() {
    this.initChart();
    this.getData();
    window.addEventListener("resize", this.screenAdapter);
    // 在页面加载完成的时候, 主动进行屏幕的适配
    this.screenAdapter();
  },
  destroyed() {
    clearInterval(this.timerId);
    // 在组件销毁的时候, 需要将监听器取消掉
    window.removeEventListener("resize", this.screenAdapter);
  },
  methods: {
    // 初始化echartInstance对象
    initChart() {
      this.chartInstance = echarts.init(this.$refs.echarts);
      // 对图表初始化配置的控制
      var initOption = {
        backgroundColor: "#000E1A",
        title: {
          text: "▎商家销售统计",
          left: 20,
          top: 20,
        },
        grid: {
          top: "20%",
          left: "3%",
          right: "6%",
          bottom: "3%",
          containLabel: true, // 距离是包含坐标轴上的文字
        },
        xAxis: {
          type: "value",
        },
        yAxis: {
          type: "category",
        },
        tooltip: {
          trigger: "axis",
          axisPointer: {
            type: "line",
            z: 0,
            lineStyle: {
              width: 66,
              color: "#2D3443",
            },
          },
        },

        series: [
          {
            type: "bar",

            label: {
              show: true,
              position: "right",
              textStyle: {
                color: "white",
              },
            },
            barWidth: 33,
            itemStyle: {
              barBorderRadius: [0, 33, 33, 0],
              // 指明颜色渐变的方向
              // 指明不同百分比之下颜色的值
              color: new echarts.graphic.LinearGradient(0, 0, 1, 0, [
                // 百分之0状态之下的颜色值
                {
                  offset: 0,
                  color: "#5052EE",
                },
                // 百分之100状态之下的颜色值
                {
                  offset: 1,
                  color: "#AB6EE5",
                },
              ]),
            },
          },
        ],
      };
      this.chartInstance.setOption(initOption);
      // 对图标鼠标事件监听
      this.chartInstance.on("mouseover", () => {
        clearInterval(this.timerId);
      });
      this.chartInstance.on("mouseout", () => {
        this.startInterval();
      });
    },
    // 获取服务器的数据
    async getData() {
      const { data: res } = await this.$http.get("seller");
      // console.log(res);
      this.allData = res;
      // 对数据排序
      this.allData.sort((a, b) => {
        return b.value - a.value;
      });
      // 每五个元素显示一页
      // console.log(this.allData.length);
      this.totalPage =
        this.allData.length % 5 === 0
          ? this.allData.length / 5
          : this.allData.length / 5 + 1;
      this.updateChart();
      // 启动定时器
      this.startInterval();
    },
    // 更新图表
    updateChart() {
      const start = (this.currentPage - 1) * 5;
      const end = this.currentPage * 5;
      const showData = this.allData.slice(start, end);
      const sellerName = showData.map((item) => {
        return item.name;
      });
      const sellerValue = showData.map((item) => {
        return item.value;
      });
      // console.log(res);
      var dataOption = {
        yAxis: {
          data: sellerName,
        },

        series: [
          {
            data: sellerValue,
          },
        ],
      };
      this.chartInstance.setOption(dataOption);
    },
    startInterval() {
      if (this.timerId) {
        clearInterval(this.timerId);
      }
      this.timerId = setInterval(() => {
        this.currentPage++;
        if (this.currentPage > this.totalPage) {
          this.currentPage = 1;
        }
        this.updateChart();
      }, 3000);
    },
    // 当浏览器的大小发生变化的时候, 会调用的方法, 来完成屏幕的适配
    screenAdapter() {
      const titleFontSize = (this.$refs.echarts.offsetWidth / 100) * 3.6;
      // 和分辨率大小相关的配置项
      const adapterOption = {
        title: {
          textStyle: {
            fontSize: titleFontSize,
          },
        },
        tooltip: {
          axisPointer: {
            lineStyle: {
              width: titleFontSize,
            },
          },
        },
        series: [
          {
            barWidth: titleFontSize,
            itemStyle: {
              barBorderRadius: [0, titleFontSize / 2, titleFontSize / 2, 0],
            },
          },
        ],
      };
      this.chartInstance.setOption(adapterOption);
      // 手动的调用图表对象的resize 才能产生效果
      this.chartInstance.resize();
    },
  },
};
</script>

<style scoped lang="less">
.container {
  width: 100%;
  height: 100%;
  .echarts {
    width: 100%;
    height: 100%;
  }
}
</style>