ucharts双指缩放图表

关键属性

ontouch：是否监听@touchstart@touchmove@touchend事件;

onzoom：是否开启图表双指缩放功能，仅针对直角坐标系图表，并且开启了ontouch及opts.enableScroll滚动条才可用;

enableScroll：开启滚动条，X轴配置里需要配置itemCount单屏幕数据点数量;

canvas2d：canvas2d模式，用于解决小程序层级过高及拖拽卡顿问题;

canvasId：开启canvas2d模式，必须指定canvasId，否则会出现偶尔获取不到dom节点的问题;

<template>
	<view>
		<qiun-data-charts type="line" :opts="opts"
		  :chartData="chartData"
		  :ontouch="true"
		  canvas2d
          canvasId="canvasId"
		  :disableScroll="true"
		  :onzoom="true"/>
	</view>
</template>

<script>
	export default {
		data() {
			return {
                //图表数据
				chartData: {categories:[],series:[]},
				opts: {
					padding: [15,10,0,15],
					enableScroll: true,
					legend: {},
					xAxis: {
					  disableGrid: true,
					  scrollShow: true,
					  itemCount: 6
					},
					yAxis: {
					  gridType: "dash",
					  dashLength: 2
					},
					extra: {
					  line: {
						type: "straight",
						width: 2,
						activeType: "hollow"
					  }
					}
				 },
			};
		},
    }
</script>