
微信小程序 引入echart 必须给ec-canvas标签外部定义一个box并且设置宽度和高度,不然图表不显示 直接设置给ec-canvas标签高度和宽度也不行
下载
下载ec-cavas地址:https://github.com/ecomfe/echarts-for-weixin
wxml
<div id="main" style="">
<ec-canvas id="mychart-dom-bar" canvas-id="mychart-bar" ec="{{ ec }}"></ec-canvas>
</div>
json
{
"usingComponents": {
"ec-canvas": "../../ec-canvas/ec-canvas"
}
}
import * as echarts from '../../ec-canvas/echarts';
let chart = null;
function initChart(canvas, width, height, dpr) {
chart = echarts.init(canvas, null, {
width: width,
height: height,
devicePixelRatio: dpr // new
});
canvas.setChart(chart);
var option = {
grid:{
y:"100rpx"
},
legend: {
width:"5",
left:"50",
//itemHeight: 18,
//itemWidth: 18,
icon:"rect",
padding:[0,0,0,0],
//itemGap:"30rpx",
textStyle:{
fontSize:"20rpx",
color:"#999999"
}
},
tooltip: {},
dataset: {
source: [
['product', '收房次数', '出房次数'],
['05-01', 8, 6],
['05-02', 8, 6],
['05-03', 8, 6],
['05-04', 8, 6],
['05-05', 8, 6],
['05-06', 8, 6],
['05-07', 8, 6]
]
},
xAxis: {type: 'category',axisLine:{
lineStyle:{
color:'#999999'
}
},
axisLabel:{
textStyle:{
fontSize:'20rpx'
}
}
},
yAxis: {
axisLabel:{
formatter:'{value}次',
textStyle:{
fontSize:"20rpx"
}
},
axisLine:{
lineStyle:{
color:'#999999'
}
}
},
// Declare several bar series, each will be mapped
// to a column of dataset.source by default.
series: [
{type: 'bar',itemStyle:{
normal:{
color:'#5acc83'
}
},barWidth : 20},
{type: 'bar',itemStyle:{
normal:{
color:'#50a8f9'
}
},barWidth : 20}
],
};
chart.setOption(option);
return chart;
}
Page({
onShareAppMessage: function (res) {
return {
title: 'ECharts 可以在微信小程序中使用啦!',
path: '/pages/index/index',
success: function () { },
fail: function () { }
}
},
data: {
ec: {
onInit: initChart
}
},
onReady() {
setTimeout(function () {
// 获取 chart 实例的方式
// console.log(chart)
}, 2000);
}
});
#main{
position: relative; z-index: 9;
width: 750rpx;height:405rpx;
}
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