## **图表示例** :-: ![](https://box.kancloud.cn/a3c42919a45fbf93db028fe9a0975adc_468x345.gif) ## **标准数据格式** ``` "chartData": { "series": [{ "name": "一班", "data": 50 }, { "name": "二班", "data": 30 }, { "name": "三班", "data": 20 }, { "name": "四班", "data": 18 }, { "name": "五班", "data": 8 }] } ``` ## **调用方法** ``` new uCharts({ $this:this, canvasId: canvasId, type: 'ring', fontSize:11, legend:true, title: { name: '70%', color: '#7cb5ec', fontSize: 25, offsetY:-20, }, subtitle: { name: '收益率', color: '#666666', fontSize: 15, offsetY:30, }, extra: { pie: { offsetAngle: -45, ringWidth: 40, labelWidth:15 } }, background:'#FFFFFF', pixelRatio:1, series: chartData.series, animation: true, width: this.cWidth, height: this.cHeight, disablePieStroke: true, dataLabel: true, }); ``` >[danger] `lableWidth:15`为必填参数,否则报错 ## **完整代码示例** ``` <template> <view class="qiun-columns"> <view class="qiun-bg-white qiun-title-bar qiun-common-mt" > <view class="qiun-title-dot-light">环形图</view> </view> <view class="qiun-charts" > <canvas canvas-id="canvasRing" id="canvasRing" class="charts" @touchstart="touchRing"></canvas> </view> </view> </template> <script> import uCharts from '@/components/u-charts/u-charts.js'; var _self; var canvaRing=null; export default { data() { return { cWidth:'', cHeight:'', pixelRatio:1, serverData:'', } }, onLoad() { _self = this; this.cWidth=uni.upx2px(750); this.cHeight=uni.upx2px(500); this.getServerData(); }, methods: { getServerData(){ uni.request({ url: 'https://www.ucharts.cn/data.json', data:{ }, success: function(res) { console.log(res.data.data) let Ring={series:[]}; //这里我后台返回的是数组,所以用等于,如果您后台返回的是单条数据,需要push进去 Ring.series=res.data.data.Ring.series; _self.showRing("canvasRing",Ring); }, fail: () => { _self.tips="网络错误,小程序端请检查合法域名"; }, }); }, showRing(canvasId,chartData){ canvaRing=new uCharts({ $this:_self, canvasId: canvasId, type: 'ring', fontSize:11, legend:true, title: { name: '70%', color: '#7cb5ec', fontSize: 25*_self.pixelRatio, offsetY:-20*_self.pixelRatio, }, subtitle: { name: '收益率', color: '#666666', fontSize: 15*_self.pixelRatio, offsetY:30*_self.pixelRatio, }, extra: { pie: { offsetAngle: -45, ringWidth: 40*_self.pixelRatio, labelWidth:15 } }, background:'#FFFFFF', pixelRatio:_self.pixelRatio, series: chartData.series, animation: true, width: _self.cWidth*_self.pixelRatio, height: _self.cHeight*_self.pixelRatio, disablePieStroke: true, dataLabel: true, }); }, touchRing(e){ canvaRing.showToolTip(e, { format: function (item) { return item.name + ':' + item.data } }); }, } } </script> <style> page{background:#F2F2F2;width: 750upx;overflow-x: hidden;} .qiun-padding{padding:2%; width:96%;} .qiun-wrap{display:flex; flex-wrap:wrap;} .qiun-rows{display:flex; flex-direction:row !important;} .qiun-columns{display:flex; flex-direction:column !important;} .qiun-common-mt{margin-top:10upx;} .qiun-bg-white{background:#FFFFFF;} .qiun-title-bar{width:96%; padding:10upx 2%; flex-wrap:nowrap;} .qiun-title-dot-light{border-left: 10upx solid #0ea391; padding-left: 10upx; font-size: 32upx;color: #000000} .qiun-charts{width: 750upx; height:500upx;background-color: #FFFFFF;} .charts{width: 750upx; height:500upx;background-color: #FFFFFF;} </style> ```