在uniapp中可以引入echarts创建数据可视化图表。
1. 安装Echarts
使用npm安装echarts插件,命令如下:
npm install echarts --save
2. 引入Eharts
在需要使用Echarts的页面引入:
import *as echarts from 'echarts'
3. 创建实例
创建画布元素:
<view id="chart" style="width: 100%;height: 300px;"></view>
配置图表:
<script>
import * as echarts from 'echarts';
export default {
data() {
return {
};
},
onReady() {
this.initChart();
},
methods: {
initChart() {
let chartDom = document.getElementById("chart");
let myChart = echarts.init(chartDom);
const option = this.getChartOption();
option && myChart.setOption(option);
},
getChartOption() {
const dataList = [{
name: '周一',
value: '120'
},
{
name: '周二',
value: '200'
},
{
name: '周三',
value: '150'
},
{
name: '周四',
value: '80'
},
{
name: '周五',
value: '70'
},
{
name: '周六',
value: '110'
},
{
name: '周天',
value: '130'
}
]
const option = {
xAxis: {
type: 'category',
data: dataList.map(item => item.name),
axisLabel: {
margin: 20
}
},
yAxis: {
type: 'value'
},
series: [{
// /数据图
data: dataList.map(item => item.value),
type: 'bar',
barWidth: 20,
itemStyle: {
color: new echarts.graphic.LinearGradient(0, 1, 0, 0, [{
offset: 0,
color: '#3C7AB9'
},
{
offset: 1,
color: '#3398BC'
}
])
},
z: 1,
},
{
// /数据图
data: dataList.map(item => item.value),
type: 'bar',
barGap: 0,
barWidth: 20,
itemStyle: {
color: new echarts.graphic.LinearGradient(0, 1, 0, 0, [{
offset: 0,
color: '#4DACFF'
},
{
offset: 1,
color: '#44D9FC'
}
])
},
z: 1,
},
{
// 最上面菱形
data: dataList.map(item => item.value),
type: 'pictorialBar',
symbol: 'diamond',
symbolSize: ['40', '30'],
symbolPosition: 'end',
symbolOffset: ['', '-50%'],
itemStyle: {
color: '#44D5FC'
},
z: 2
},
{
// 最下面菱形
data: dataList.map(item => item.value),
type: 'pictorialBar',
symbol: 'diamond',
symbolSize: ['40', '30'],
symbolPosition: 'start',
symbolOffset: ['', '50%'],
itemStyle: {
color: new echarts.graphic.LinearGradient(0, 0, 1, 0, [{
offset: 0,
color: '#3C7AB9'
},
{
offset: 0.5,
color: '#3C7AB9'
},
{
offset: 0.51,
color: '#4DACFF'
},
{
offset: 1,
color: '#4DACFF'
}
])
},
z: 1
},
]
};
return option;
}
}
}
</script>
总结
我们可以单页面引入Echarts,也可以全局注册使用Echarts,在main.js中引入:
import * as echarts from 'echarts'
Vue.prototype.echarts = echarts;