第一种按插件的例子引入
<view class="qiun-columns">
<view class="qiun-bg-white qiun-title-bar qiun-common-mt" >
<view class="qiun-title-dot-light">基本折线图</view>
</view>
<view class="qiun-charts" >
<canvas canvas-id="canvasLineA" id="canvasLineA" class="charts" @touchstart="touchLineA"></canvas>
</view>
</view>
这种方式的缺点是如果体格页面需要多个图表 该页面重复代码非常多看起来比较恼火
第二种就是以组件的方式引入了
基本思路就是把ucharts要用到的统计图封装成组件 然后引到父组件中
demo
<view class="lineBroken">
<view class="flowPassenger">
<em></em><text>进店客流</text><text class="seeDetail" @click="intShopRanking">查看详情</text><view style="width: 46rpx;"><image src="../static/img/triangleArrow.svg" mode="aspectFit"></image></view>
</view>
<view class="lineChart">
<view class="histogram_chart">
<canvas
:canvasId="canvasId"
id="canvasId"
disable-scroll="true"
:style="{ width: cWidth + 'px', height: cHeight + 'px' }"
@touchstart="touchstart"
@touchmove="touchmove"
@touchend="touchend"
/>
<slot />
</view>
</view>
</view>
js内：
<script>
import uCharts from '../js_sdk/u-charts/u-charts/u-charts.js'; //可以优化放全局 uCharts ==>使用全局
const lineCharts = {},
optionAs = {};
export default {
name: 'LineChart',
props: {
dataAs: {
//数据
type: Object,
default: () => ({})
},
basicAs: {
////通用基础项设置
type: Object,
default: () => ({})
},
xAxisAs: {
//xAxis YAxis等轴线基础设置(圆环饼图无轴线无需设置)
type: Object,
default: () => ({})
},
yAxisAs: {
//xAxis YAxis等轴线基础设置(圆环饼图无轴线无需设置)
type: Object,
default: () => ({})
},
legendAs: {
//图例设置
type: Object,
default: () => ({})
},
extraAs: {
//详情请看 http://doc.ucharts.cn/1172130
type: Object,
default: () => ({})
},
width: {
//图标宽度
type: Number,
default: 750
},
height: {
//图标高度
type: Number,
default: 500
},
labelKey: {
type: String,
default: 'categories'
},
valueKey: {
type: String,
default: 'series'
},
canvasId: {
type: String,
default: `line_canvas_${Math.ceil(Math.random(5) * 10000)}`
}
},
data() {
return {};
},
computed: {
cWidth() {
return uni.upx2px(this.width);
},
cHeight() {
return uni.upx2px(this.height);
}
},
mounted() {
this.initData();
},
watch:{
dataAs(){
this.dataAs = this.dataAs
console.log(this.dataAs)
this.initData();
},
},
methods: {
/*父组件调用*/
lineStatistical:function(){
console.log(this.dataAs)
// this.initData();
},
initData:function(){
let defaultOption = {
//通用基础项设置 basicAs
$this: this, //this实例组件内使用图表，必须传入this实例
canvasId: this.canvasId, //页面组件canvas-id，支付宝中为id
type: 'line', //图表类型，可选值为pie、line、column、area、ring、radar、arcbar、gauge、candle、bar、mix、rose、word
animation: true, //是否动画展示
dataLabel: false, //是否在图表中显示数据标签内容值
dataPointShape: true,
duration: 1000, //动画展示时长单位毫秒
fontSize: 12, //全局默认字体大小（可选，单位为px，默认13px）高分屏不必乘像素比，自动根据pixelRatio计算
background: '#ffffff', //canvas背景颜色（如果页面背景颜色不是白色请设置为页面的背景颜色，默认#ffffff）无作用
pixelRatio: 1, //像素比，默认为1，仅支付宝小程序需要大于1，其他平台必须为1
width: this.cWidth, //canvas宽度，单位为px，支付宝高分屏需要乘像素比(pixelRatio)
height: this.cHeight, //canvas高度，单位为px，支付宝高分屏需要乘像素比
//数据列表配置项 dataAS
categories: this.dataAs[this.labelKey], //数据类别(饼图、圆环图不需要)
series: this.dataAs[this.valueKey], //数据列表
//坐标轴配置项 axisAs
xAxis: {
type:'grid',
gridColor:'#CCCCCC',
gridType:'dash',
dashLength:8,
rotateLabel:'true',
fontSize:2,
fontColor:'#FFFFFF',
},
yAxis: {
//如果是多坐标系则传数组型对象[{disabled:true},{disabled:false}]
disabled: false, //不绘制Y轴
position: 'left', //Y轴位置，可选值左侧left右侧right(未起效果)
format: val => {
let defaultSetting = { type: 'number', fixed: 0, name: '人' };
let { type, fixed, name } = this.yAxisAs && this.yAxisAs.formatter ? Object.assign(defaultSetting, this.yAxisAs.formatter) : defaultSetting;
if (type == 'number') {
return val.toFixed(fixed) + name;
} else if (type == 'percent') {
let newName = name || '%';
return (val * 100).toFixed(fixed) + newName;
} else {
return val.toFixed(0) + '人';
}
}
// title:'Y轴标题',//Y轴标题
// titleFontSize:basic.fontSize titleFontColor==>#666666 fontColor==>666666 Y轴数据点颜色 fontSizeY轴数据标签字体大小 等详见http://doc.ucharts.cn/1172128
},
//图列配置 legendAs
legend: {
show: true, //是否显示各类别的图例标识
},
//扩展配置 extraAs 详情请看 http://doc.ucharts.cn/1172130
extra: {
line: {
type: 'straight'
}
}
};
optionAs[this.canvasId] = Object.assign(defaultOption, this.basicAs, this.xAxisAS, this.yAxisAS, this.legendAs, this.extraAs);
lineCharts[this.canvasId] = new uCharts(optionAs[this.canvasId]);
},
touchstart(e) {
let that = this;
lineCharts[this.canvasId].touchLegend(e, { animation: false });
lineCharts[this.canvasId].scrollStart(e);
lineCharts[this.canvasId].showToolTip(e, {
//修改点击事弹出文字
format: function(item, category) {
let defaultSetting = { type: 'number', fixed: 0, name: '' };
let newName;
let { type, fixed, name } = that.yAxisAs && that.yAxisAs.formatter ? Object.assign(defaultSetting, that.yAxisAs.formatter) : defaultSetting;
if (typeof item.data === 'object') {
if (type == 'number') {
return `${category} ${item.name}:${item.data.value.toFixed(fixed)}${name}`;
} else if (type == 'percent') {
newName = name || '%';
return `${category} ${item.name}:${(item.data.value * 100).toFixed(fixed)}${newName}`;
} else {
return `${category} ${item.name}:${item.data.value}`;
}
} else {
if (type == 'number') {
return `${category} ${item.name}:${item.data.toFixed(fixed)}${name}`;
} else if (type == 'percent') {
newName = name || '%';
return `${category} ${item.name}:${(item.data * 100).toFixed(fixed)}${newName}`;
} else {
return `${category} ${item.name}:${item.data}`;
}
}
}
});
},
touchmove(e) {
lineCharts[this.canvasId].scroll(e);
},
touchend(e) {
lineCharts[this.canvasId].scrollEnd(e);
},
intShop(){
uni.navigateTo({url: '/pages/intShopDetail/intShopDetail'});
},
}
};
</script>
css内：
<style>
.lineBroken{
width: 100%;
margin-top: 98rpx;
display: flex;
flex-wrap: wrap;
margin-bottom: 182rpx;
}
.flowPassenger{
width: 100%;
height: 42rpx;
display: flex;
font-size: 32rpx;
}
.flowPassenger em{
width: 12rpx;
height: 34rpx;
/* border: 1rpx solid rgb(0,82,254); */
background: rgb(0,82,254);
border-radius: 6rpx;
margin: 4rpx 0 0 30rpx;
}
.flowPassenger text{
width: 36%;
height: 42rpx;
color: rgb(0,82,254);
margin: 0 0 0 20rpx;
}
.flowPassenger>.seeDetail{
width: 18%;
height: 42rpx;
color: rgb(0,82,254);
margin-left: 28%;
}
.flowPassenger image{
width: 100%;
height: 46rpx;
margin-top: 3rpx;
}
.lineChart{
margin-top: 70rpx;
/* width: 750rpx; */
height: 500rpx;
display: flex;
background-color: #FFFFFF;
}
</style>