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uni-app之图表的实现

uni-app之图表的实现

作者: 瑟闻风倾 | 来源:发表于2019-07-16 15:01 被阅读13次

    备注：使用插件uCharts高性能跨全端图表，
    (1)下载插件源码，并将u-charts.js所在文件夹导入项目的components文件下。
    (2)页面使用该插件实现折线图

    <template>
    <view>
        <view class="qiun-bg-white qiun-title-bar qiun-common-mt">
            <view class="qiun-title-dot-light">班组7天产量折线图</view>
            <!-- 使用图表拖拽功能时，建议给canvas增加disable-scroll=true属性，在拖拽时禁止屏幕滚动 -->
        </view>
        <view class="qiun-charts">
            <!--#ifdef MP-ALIPAY -->
            <canvas canvas-id="canvasLineA" id="canvasLineA" class="charts" :style="{'width':cWidth*pixelRatio+'px','height':cHeight*pixelRatio+'px', 'transform': 'scale('+(1/pixelRatio)+')','margin-left':-cWidth*(pixelRatio-1)/2+'px','margin-top':-cHeight*(pixelRatio-1)/2+'px'}"
             disable-scroll=true @touchstart="touchLineA" @touchmove="moveLineA" @touchend="touchEndLineA"></canvas>
            <!-- 使用图表拖拽功能时，建议给canvas增加disable-scroll=true属性，在拖拽时禁止屏幕滚动 -->
            <!--#endif-->
            <!--#ifndef MP-ALIPAY -->
            <canvas canvas-id="canvasLineA" id="canvasLineA" class="charts" disable-scroll=true @touchstart="touchLineA"
             @touchmove="moveLineA" @touchend="touchEndLineA"></canvas>
            <!-- 使用图表拖拽功能时，建议给canvas增加disable-scroll=true属性，在拖拽时禁止屏幕滚动 -->
            <!--#endif-->
        </view>

    </view>
</template>

<script>
var _self,ct_id;
import uCharts from '../../components/u-charts/u-charts.js';
var canvaLineA = null;

export default {
    data() {
        return {
            cWidth: '',
            cHeight: '',
            pixelRatio: 1,
            outputArr : [],
            dateArr :[],
        
        }
    },
    methods: {
        initData:function () {
            this.sendRequest({
                url : "CompanyTeam/teamInfo",
                data : {ct_id : ct_id},
                method : "POST",
                success:function (res) {
                    var date = [], output = [];
                    res.data.list.map(function(item){
                        date.push(item.time);
                        output.push(item.total);
                    });
                    _self.dateArr = date;
                    _self.outputArr = output;
                    console.log("dateArr:" + _self.dateArr +";outputArr:" + _self.outputArr + "");
                    
                    let LineA = {
                        categories: [],
                        series: [{
                            "name": "产量",
                            "data": []
                        }]
                    };
                    LineA.categories = _self.dateArr;
                    LineA.series[0].data = _self.outputArr;
                    _self.showLineA("canvasLineA", LineA);
                }
            },"/pages/machineGroupOutput/machineGroupOutput","1")
        },
        showLineA:function(canvasId, chartData) {
            canvaLineA = new uCharts({
                $this: _self,
                canvasId: canvasId,
                type: 'line',
                fontSize: 11,
                legend: true,
                dataLabel: false,
                dataPointShape: false,
                background: '#FFFFFF',
                pixelRatio: _self.pixelRatio,
                categories: chartData.categories,
                series: chartData.series,
                animation: false,
                enableScroll: true, //开启图表拖拽功能
                xAxis: {
                    disableGrid: false,
                    type: 'grid',
                    gridType: 'dash',
                    itemCount: 4, //可不填写，配合enableScroll图表拖拽功能使用，x轴单屏显示数据的数量，默认为5个
                    scrollShow: true, //新增是否显示滚动条，默认false
                    scrollAlign: 'left',
                    //scrollBackgroundColor:'#F7F7FF',//可不填写，配合enableScroll图表拖拽功能使用，X轴滚动条背景颜色,默认为 #EFEBEF
                    //scrollColor:'#DEE7F7',//可不填写，配合enableScroll图表拖拽功能使用，X轴滚动条颜色,默认为 #A6A6A6
                },
                yAxis: {
                    //disabled:true
                    gridType: 'dash',
                    splitNumber: 8,
                    min: 10,
                    max: 180,
                    format: (val) => {
                        return val.toFixed(0) + '件'
                    } //如不写此方法，Y轴刻度默认保留两位小数
                },
                width: _self.cWidth * _self.pixelRatio,
                height: _self.cHeight * _self.pixelRatio,
                dataLabel: true,
                dataPointShape: true,
                extra: {
                    lineStyle: 'straight'
                },
            });
        
        },
        touchLineA(e) {
            canvaLineA.scrollStart(e);
        },
        moveLineA(e) {
            canvaLineA.scroll(e);
        },
        touchEndLineA(e) {
            canvaLineA.scrollEnd(e);
            //下面是toolTip事件，如果滚动后不需要显示，可不填写
            canvaLineA.showToolTip(e, {
                format: function(item, category) {
                    return category + ' ' + item.name + ':' + item.data
                }
            });
        },
        
    },
    onLoad:function(options){
        _self = this;
        this.cWidth = uni.upx2px(750);
        this.cHeight = uni.upx2px(500);
        
        ct_id =  options.ct_id;
        
    },
    onShow:function(){
        _self.initData();
    }
}
</script>

<style>
.qiun-bg-white {
    background: #FFFFFF;
}
.qiun-title-bar {
    /* width: 96%; */
    padding: 10upx 2%;
    flex-wrap: nowrap;
}
.qiun-common-mt {
        margin-top: 10upx;
    }
.qiun-title-dot-light {
    border-left: 10upx solid #0ea391;
    padding-left: 10upx;
    font-size: 32upx;
    color: #000000
}
/* 通用样式 */
.qiun-charts {
    width: 750upx;
    height: 500upx;
    background-color: #FFFFFF;
}

.charts {
    width: 750upx;
    height: 500upx;
    background-color: #FFFFFF;
}
</style>

    折线图效果展示:

    折线图效果展示.png
    (3)页面使用该插件实现饼状图 
    <template>
    <view>
        <view v-if="total>0">
            <view class="qiun-bg-white qiun-title-bar qiun-common-mt">
                <view class="qiun-title-dot-light">各设备消费占比</view>
            </view>
            <view class="qiun-charts">
                <!--#ifdef MP-ALIPAY -->
                <canvas canvas-id="canvasPie" id="canvasPie" class="charts" :style="{'width':cWidth*pixelRatio+'px','height':cHeight*pixelRatio+'px', 'transform': 'scale('+(1/pixelRatio)+')','margin-left':-cWidth*(pixelRatio-1)/2+'px','margin-top':-cHeight*(pixelRatio-1)/2+'px'}"></canvas>
                <!--#endif-->
                <!--#ifndef MP-ALIPAY -->
                <canvas canvas-id="canvasPie" id="canvasPie" class="charts"></canvas>
                <!--#endif-->
            </view>
        </view> 

        <view class='item-list'>
            <view class='item' v-for="(item,index) in orderList.name" :key="item">
                <view :style="{'background-color': orderList.color[index]}" class='color'></view>
                <view class='item-name'>
                    <view class='machine-name'>{{item}}</view>
                    <view class='machine-sn'>{{orderList.sn[index]}}</view>
                </view>
                <view class='item-num'>￥{{orderList.data[index]}}</view>
            </view>
        </view>

    </view>
</template>

<script>
var _self;  
var util = require("../../commons/util.js");
// import uCharts from '../../components/u-charts/u-charts.js';
var uCharts = require("../../components/u-charts/u-charts.js");//也可通过import的方式导入
export default {
    data() {
        return {
            cWidth: '',
            cHeight: '',
            pixelRatio: 1,
            total : 0.00,
            orderList : {
                name: [],
                data : [],
                sn: [],
                color: []
            }
        }
    },
    methods: {
        initData:function () {
            var time = _self.getSelectedData();
            this.sendRequest({
                url : "account/index",
                data: {},
                success : function(res){
                    _self.total = res.data.total;
                    _self.orderList = res.data.orderList;
                    if(_self.orderList!=[] && _self.orderList.name && _self.orderList.name.length>0){
                        let Pie = {
                            series: []
                        };
                        //获取图例颜色并设置颜色
                        var colorArr = [];
                        for(var i=0;i<_self.orderList.name.length;i++){
                            colorArr[i] = uCharts.prototype.getColor(i);
                        }
                        _self.orderList.color = colorArr;
                        //获取图标数据并绘制
                        for(var i=0;i<_self.orderList.name.length;i++){
                            Pie.series.push({
                                name:_self.orderList.name[i],
                                data:_self.orderList.data[i]
                            })
                        }
                        
                        _self.showPie("canvasPie", Pie);
                    }
                    
                }
            },'../account/account','1')
        },
        showPie:function(canvasId, chartData) {
            new uCharts({
                $this: _self,
                canvasId: canvasId,
                type: 'pie',
                fontSize: 11,
                legend: true,
                background: '#FFFFFF',
                pixelRatio: _self.pixelRatio,
                series: chartData.series,
                animation: false,
                width: _self.cWidth * _self.pixelRatio,
                height: _self.cHeight * _self.pixelRatio,
                dataLabel: true,
                extra: {
                    pie: {
                        lableWidth: 15
                    }
                },
            });
        },
    },
    onLoad:function(){
        _self = this;
        this.cWidth = uni.upx2px(750);
        this.cHeight = uni.upx2px(500);
    },
    onShow:function(){
        _self.initData();
    }
}
</script>

<style>
page {
  text-align: center;
  background-color: #f8f8f8;
}
.qiun-bg-white {
    background: #FFFFFF;
}
.qiun-title-bar {
    /* width: 96%; */
    padding: 10upx 2%;
    flex-wrap: nowrap;
}
.qiun-common-mt {
        margin-top: 10upx;
    }
.qiun-title-dot-light {
    border-left: 10upx solid #0ea391;
    padding-left: 10upx;
    font-size: 32upx;
    color: #000000
}
/* 通用样式 */
.qiun-charts {
    width: 750upx;
    height: 500upx;
    background-color: #FFFFFF;
}

.charts {
    width: 750upx;
    height: 500upx;
    background-color: #FFFFFF;
}
</style>

    u-charts.js添加如下代码：

    //自定义获取并设置颜色
Charts.prototype.getColor = function(i){
    var index = i % config.colors.length;
    return config.colors[index];
};

    饼状图及对应列表效果展示:

    饼状图效果展示.png

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