## **图表示例** :-: ![](https://box.kancloud.cn/af4fb86f40538d85da3e8def8669b87d_468x342.gif) ## **标准数据格式** ``` "chartData": { "categories": ["2012", "2013", "2014", "2015", "2016", "2017"], "series": [{ "name": "成交量1", "data": [15, {"value": 20,"color": "#f04864"}, 45, 37, 43, 34] }, { "name": "成交量2", "data": [30, {"value": 40,"color": "#facc14"}, 25, 14, 34, 18] }] } ``` ## **调用方法** ``` canvaColumn=new uCharts({ $this:this, canvasId: canvasId, type: 'column', legend:{show:true}, fontSize:11, background:'#FFFFFF', pixelRatio:1, animation: true, categories: chartData.categories, series: chartData.series, xAxis: { disableGrid:true, }, yAxis: { //disabled:true }, dataLabel: true, width: this.cWidth, height: this.cHeight, extra: { column: { type:'group', width: 20 } } }); ``` ## **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">基本柱状图</view> </view> <view class="qiun-charts" > <canvas canvas-id="canvasColumn" id="canvasColumn" class="charts" @touchstart="touchColumn"></canvas> </view> </view> </template> <script> import uCharts from '@/components/u-charts/u-charts.js'; var _self; var canvaColumn=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) //下面这个根据需要保存后台数据,我是为了模拟更新柱状图,所以存下来了 _self.serverData=res.data.data; let Column={categories:[],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 Column.categories=res.data.data.Column.categories; Column.series=res.data.data.Column.series; _self.showColumn("canvasColumn",Column); }, fail: () => { _self.tips="网络错误,小程序端请检查合法域名"; }, }); }, showColumn(canvasId,chartData){ canvaColumn=new uCharts({ $this:_self, canvasId: canvasId, type: 'column', legend:{show:true}, fontSize:11, background:'#FFFFFF', pixelRatio:_self.pixelRatio, animation: true, categories: chartData.categories, series: chartData.series, xAxis: { disableGrid:true, }, yAxis: { //disabled:true }, dataLabel: true, width: _self.cWidth*_self.pixelRatio, height: _self.cHeight*_self.pixelRatio, extra: { column: { type:'group', width: _self.cWidth*_self.pixelRatio*0.45/chartData.categories.length } } }); }, touchColumn(e){ canvaColumn.showToolTip(e, { format: function (item, category) { if(typeof item.data === 'object'){ return category + ' ' + item.name + ':' + item.data.value }else{ return category + ' ' + 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> ```