在支付宝小程序中使用ucharts
时间: 2023-12-15 21:06:21 浏览: 163
在支付宝小程序中使用ucharts可以通过`<canvas>`标签和`canvas`绘图的方式来实现。具体步骤如下:
1. 下载并引入uCharts库,可以将下载好的文件夹放在项目的`utils`文件夹下,然后在需要使用的页面对应的`js`文件中引入,并创建绘图对象,例如:
```javascript
import uCharts from '../../utils/u-charts/u-charts.min.js';
Page({
data: {
chartData: null,
pixelRatio: 1,
windowWidth: 320
},
onLoad() {
let windowWidth = 320;
try {
const res = wx.getSystemInfoSync();
windowWidth = res.windowWidth;
this.setData({
pixelRatio: res.pixelRatio,
windowWidth: windowWidth
});
} catch (e) {
console.error('获取系统信息失败:', e);
}
const chartData = {
categories: ['1月', '2月', '3月', '4月', '5月', '6月'],
series: [{
name: '成交量',
data: [10, 20, 30, 40, 50, 60]
}, {
name: '成交额',
data: [100, 200, 300, 400, 500, 600]
}]
};
this.setData({
chartData: chartData
});
const context = wx.createCanvasContext('chart');
const chart = new uCharts({
$this: this,
canvasId: 'chart',
type: 'column',
width: windowWidth,
height: 200,
pixelRatio: this.data.pixelRatio,
legend: {
show: true,
position: 'top',
fontSize: 14,
fontFamily: 'Arial',
fontWeight: 'bold',
fontColor: '#666',
lineHeight: 20
},
dataLabel: {
show: true,
formatter: (name, value) => {
return value;
},
fontSize: 12,
fontFamily: 'Arial',
fontWeight: 'normal',
fontColor: '#666',
lineHeight: 20,
margin: 10
},
xAxis: {
data: chartData.categories,
axisLine: {
show: true,
lineColor: '#ccc',
lineWidth: 1
},
axisTick: {
show: true,
lineColor: '#ccc',
lineWidth: 1,
length: 5,
spacing: 5
},
axisLabel: {
show: true,
fontSize: 12,
fontFamily: 'Arial',
fontWeight: 'normal',
fontColor: '#666',
rotate: 0
},
boundaryGap: true
},
yAxis: {
axisLine: {
show: true,
lineColor: '#ccc',
lineWidth: 1
},
axisTick: {
show: true,
lineColor: '#ccc',
lineWidth: 1,
length: 5,
spacing: 5
},
axisLabel: {
show: true,
fontSize: 12,
fontFamily: 'Arial',
fontWeight: 'normal',
fontColor: '#666',
rotate: 0
},
splitLine: {
show: true,
lineColor: '#ccc',
lineWidth: 1,
type: 'solid'
}
},
series: chartData.series,
animation: true,
animationDuration: 1000,
animationEasing: 'linear'
});
chart.draw();
}
});
```
2. 在小程序页面的`wxml`文件中添加`<canvas>`标签,例如:
```html
<canvas id="chart" style="width:{{windowWidth}}px;height:200px;"></canvas>
```
其中,`id`是`canvas`的唯一标识符,`style`属性用于设置`canvas`的宽度和高度。
3. 在小程序页面的`wxss`文件中设置`<canvas>`标签的样式,例如:
```css
canvas {
width: 100%;
height: 100%;
}
```
4. 在小程序页面的`js`文件中实现`canvas`的绘图逻辑,例如:
```javascript
const context = wx.createCanvasContext('chart');
context.beginPath();
context.setStrokeStyle('#000000');
context.setLineWidth(2);
context.moveTo(0, 0);
context.lineTo(100, 100);
context.stroke();
context.draw();
```
以上就是在支付宝小程序中使用uCharts绘制图表的基本流程,具体的图表样式和配置可以根据需求进行调整。
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