设置canvas的尺寸为2倍大小,然后缩小到50%,建议都进行这样的设置,图表本身绘制时是按照高清显示配置的,不然整体效果会偏大
/* 例如设计图尺寸为320 x 300 */
.canvas {
width: 640px;
height: 600px;
transform: scale(0.5)
}
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.type String required 图表类型,可选值为pie, line, column, area
opts.categories Array required (饼图不需要) 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.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.title String Y轴title
opts.series Array required 数据列表
dataItem Object
dataItem.data Array required (饼图为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
var Charts = require('charts.js');
new Charts({
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,
}, {
name: '成交量4',
data: 63,
}],
width: 640,
height: 400,
dataLabel: false
});
new Charts({
canvasId: 'lineCanvas',
type: 'line',
categories: ['2012', '2013', '2014', '2015', '2016', '2017'],
series: [{
name: '成交量1',
data: [0.15, 0.2, 0.45, 0.37, 0.4, 0.8],
format: function (val) {
return val.toFixed(2) + '万';
}
}, {
name: '成交量2',
data: [0.30, 0.37, 0.65, 0.78, 0.69, 0.94],
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
},
width: 640,
height: 400
});
new Charts({
canvasId: 'columnCanvas',
type: 'column',
categories: ['2016-08', '2016-09', '2016-10', '2016-11', '2016-12', '2017'],
series: [{
name: '成交量1',
data: [15, 20, 45, 37, 4, 80]
}, {
name: '成交量2',
data: [70, 40, 65, 100, 34, 18]
}, {
name: '成交量3',
data: [70, 40, 65, 100, 34, 18]
}, {
name: '成交量4',
data: [70, 40, 65, 100, 34, 18]
}],
yAxis: {
format: function (val) {
return val + '万';
}
},
width: 640,
height: 400,
dataLabel: false
});
new Charts({
canvasId: 'areaCanvas',
type: 'area',
categories: ['2016-08', '2016-09', '2016-10', '2016-11', '2016-12', '2017'],
series: [{
name: '成交量1',
data: [70, 40, 65, 100, 34, 18],
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: {
format: function (val) {
return val + '万';
}
},
width: 640,
height: 400
});
原文地址:http://www.51xuediannao.com/xiaochengxu/wx-charts.html