uniapp中使用echarts并且支持pc端的拖动、拖拽和其他交互事件

bash 复制代码

npm install echarts -D

// "echarts": "^5.3.2", [推荐版本]
// "zrender": "^5.3.2"  [如果报错的话就安装这个]

javascript 复制代码

<template>
  <view class="container">
    <view id="myChart" class="chart"></view>
  </view>
</template>

<script>
import * as echarts from 'echarts/dist/echarts.min.js';

// 开启触摸事件支持，用于适配移动端触摸屏设备。
echarts.env.touchEventsSupported = true;

// 明确关闭微信小程序适配模式，因为当前是浏览器环境
echarts.env.wxa = false;

// 同时启用SVG和Canvas两种渲染模式，ECharts会根据浏览器能力自动选择：
// Canvas更适合大数据量场景
// SVG更适合交互操作和动画
echarts.env.svgSupported = true;
echarts.env.canvasSupported = true;

// 启用DOM操作支持，这是浏览器环境下图表渲染的基础能力
echarts.env.domSupported = true;

export default {
  data() {
    return {
      chart: null
    }
  },

  methods: {
    initChart() {
      let base = +new Date(1968, 9, 3);
      let oneDay = 24 * 3600 * 1000;
      let date = [];
      let data = [Math.random() * 300];
      for (let i = 1; i < 20000; i++) {
        var now = new Date((base += oneDay));
        date.push([now.getFullYear(), now.getMonth() + 1, now.getDate()].join('/'));
        data.push(Math.round((Math.random() - 0.5) * 20 + data[i - 1]));
      }

      const option = {
        tooltip: {
          trigger: 'axis',
          position: function (pt) {
            return [pt[0], '10%'];
          }
        },
        title: {
          left: 'center',
          text: 'Large Area Chart'
        },
        toolbox: {
          feature: {
            dataZoom: {
              yAxisIndex: 'none'
            },
            restore: {},
            saveAsImage: {}
          }
        },
        xAxis: {
          type: 'category',
          boundaryGap: false,
          data: date
        },
        yAxis: {
          type: 'value',
          boundaryGap: [0, '100%']
        },
        dataZoom: [
          {
            type: 'inside',
            start: 0,
            end: 10
          },
          {
            type: 'slider',
            start: 0,
            end: 10,
            height: 20,
            bottom: 10,
            handleSize: '100%'
          }
        ],
        series: [
          {
            name: 'Fake Data',
            type: 'line',
            symbol: 'none',
            sampling: 'lttb',
            itemStyle: {
              color: 'rgb(255, 70, 131)'
            },
            areaStyle: {
              color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [
                {
                  offset: 0,
                  color: 'rgb(255, 158, 68)'
                },
                {
                  offset: 1,
                  color: 'rgb(255, 70, 131)'
                }
              ])
            },
            data: data
          }
        ]
      };

      // 确保 DOM 渲染完成后再初始化图表
      this.$nextTick(() => {
        const chartDom = document.getElementById('myChart');
        if (chartDom) {
          this.chart = echarts.init(chartDom);
          this.chart.setOption(option);


          // 手动绑定触摸事件
          this.bindTouchEvents(chartDom);
        }
      });
    },

    bindTouchEvents(element) {
      let startX = 0;
      let startY = 0;

      element.addEventListener('touchstart', (e) => {
        if (e.touches.length === 1) {
          startX = e.touches[0].clientX;
          startY = e.touches[0].clientY;
        }
      }, {passive: false});

      element.addEventListener('touchmove', (e) => {
        // 阻止默认滚动行为
        e.preventDefault();
      }, {passive: false});
    },

    handleResize() {
      if (this.chart) {
        this.chart.resize();
      }
    }
  },

  mounted() {
    // 延迟初始化确保 DOM 完全加载
    this.initChart();

    window.addEventListener('resize', this.handleResize);
  },

  beforeDestroy() {
    if (this.chart) {
      this.chart.dispose();
    }
    window.removeEventListener('resize', this.handleResize);
  }
}
</script>

<style scoped>
.container {
  width: 100%;
  height: 100%;
}

.chart {
  width: 100vw;
  height: 400px;
  touch-action: none; /* 关键：禁用浏览器默认的触摸行为 */
}
</style>