本文实例讲述了微信小程序图表插件wx-charts用法。分享给大家供大家参考,具体如下:
微信小程序图表插件(wx-charts)基于canvas绘制,体积小巧,支持图表类型饼图、线图、柱状图 、区域图等图表图形绘制,目前wx-charts是微信小程序图表插件中比较强大好使的一个
支持图标类型
- 饼图 pie
- 圆环图 ring
- 线图 line
- 柱状图 column
- 区域图 area
- 雷达图 radar
如何使用?
1. 直接引用编译好的文件 dist/charts.js(js下载地址)
.wxml中定义
<canvas canvas-id="lineCanvas" disable-scroll="true" class="canvas"></canvas>
canvas-id与new wxCharts({canvasId:”})中canvasId一致
2. 命令行
git clone github.com/xiaolin3303/wx-charts.gitnpm install rollup -gnpm installrollup -c #或者 rollup --config rollup.config.prod.js
参数说明
opts | Object | |
opts.canvasId | String required | 微信小程序canvas-id |
opts.width | Number required | canvas宽度,单位为px |
opts.height | Number required | canvas高度,单位为px |
opts.title | Object | (only for ring chart) |
opts.title.name | String | 标题内容 |
opts.title.fontSize | Number | 标题字体大小(可选,单位为px) |
opts.title.color | String | 标题颜色(可选) |
opts.subtitle | Object | (only for ring chart) |
opts.subtitle.name | String | 副标题内容 |
opts.subtitle.fontSize | Number | 副标题字体大小(可选,单位为px) |
opts.subtitle.color | String | 副标题颜色(可选) |
opts.animation | Boolean default true | 是否动画展示 |
opts.legend | Boolen default true | 是否显示图表下方各类别的标识 |
opts.type | String required | 图表类型,可选值为pie, line, column, area…… |
opts.categories | Array required | (饼图、圆环图不需要) 数据类别分类 |
opts.dataLabel | Boolean default true | 是否在图表中显示数据内容值 |
opts.dataPointShape | Boolean default true | 是否在图表中显示数据点图形标识 |
opts.xAxis | Object | X轴配置 |
opts.xAxis.disableGrid | Boolean default false | 不绘制X轴网格 |
opts.yAxis | Object | Y轴配置 |
opts.yAxis.format | Function | 自定义Y轴文案显示 |
opts.yAxis.min | Number | Y轴起始值 |
opts.yAxis.max | Number | Y轴终止值 |
opts.yAxis.title | String | Y轴title |
opts.yAxis.disabled | Boolean default false | 不绘制Y轴 |
opts.series | Array required | 数据列表 |
数据列表每项结构定义
dataItem | Object |
dataItem.data | Array required (饼图、圆环图为Number) 数据 |
dataItem.color | String 例如#7cb5ec 不传入则使用系统默认配色方案 |
dataItem.name | String 数据名称 |
dateItem.format | Function 自定义显示数据内容 |
详见demo(具体demo git地址)
1.pie
new wxCharts({ animation: true, //是否有动画 canvasId: 'pieCanvas', type: 'pie', series: [{ name: '成交量1', data: 15, }, { name: '成交量2', data: 35, }, { name: '成交量3', data: 78, }], width: windowWidth, height: 300, dataLabel: true, });}
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2. ring
new wxCharts({ animation: true, canvasId: 'ringCanvas', type: 'ring', extra: { ringWidth: 25, pie: { offsetAngle: -45 } }, title: { name: '70%', color: '#7cb5ec', fontSize: 25 }, subtitle: { name: '收益率', color: '#666666', fontSize: 15 }, series: [{ name: '成交量1', data: 15, stroke: false }, { name: '成交量2', data: 35, stroke: false }, { name: '成交量3', data: 78, stroke: false }, { name: '成交量4', data: 63, stroke: false }], disablePieStroke: true, width: windowWidth, height: 200, dataLabel: false, legend: false, padding: 0});
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3. line
new wxCharts({ canvasId: 'lineCanvas', type: 'line', categories: simulationData.categories, animation: true, background: '#f5f5f5', series: [{ name: '成交量1', data: simulationData.data, format: function (val, name) { return val.toFixed(2) + '万'; } }, { name: '成交量2', data: [2, 0, 0, 3, null, 4, 0, 0, 2, 0], format: function (val, name) { return val.toFixed(2) + '万'; } }], xAxis: { disableGrid: true }, yAxis: { title: '成交金额 (万元)', format: function (val) { return val.toFixed(2); }, min: 0 }, width: windowWidth, height: 200, dataLabel: false, dataPointShape: true, extra: { lineStyle: 'curve' }});
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4. column
new wxCharts({ canvasId: 'columnCanvas', type: 'column', animation: true, categories: chartData.main.categories, series: [{ name: '成交量', data: chartData.main.data, format: function (val, name) { return val.toFixed(2) + '万'; } }], yAxis: { format: function (val) { return val + '万'; }, title: 'hello', min: 0 }, xAxis: { disableGrid: false, type: 'calibration' }, extra: { column: { width: 15 } }, width: windowWidth, height: 200,});
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5. area
new wxCharts({ canvasId: 'areaCanvas', type: 'area', categories: ['1', '2', '3', '4', '5', '6'], animation: true, series: [{ name: '成交量1', data: [32, 45, 0, 56, 33, 34], format: function (val) { return val.toFixed(2) + '万'; } }, { name: '成交量2', data: [15, 20, 45, 37, 4, 80], format: function (val) { return val.toFixed(2) + '万'; }, }], yAxis: { title: '成交金额 (万元)', format: function (val) { return val.toFixed(2); }, min: 0, fontColor: '#8085e9', gridColor: '#8085e9', titleFontColor: '#f7a35c' }, xAxis: { fontColor: '#7cb5ec', gridColor: '#7cb5ec' }, extra: { legendTextColor: '#cb2431' }, width: windowWidth, height: 200});
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6.radar
new wxCharts({ canvasId: 'radarCanvas', type: 'radar', categories: ['1', '2', '3', '4', '5', '6'], series: [{ name: '成交量1', data: [90, 110, 125, 95, 87, 122] }], width: windowWidth, height: 200, extra: { radar: { max: 150 } }});
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