百度柱状图系列——扩展图表

当前图表需要通过百度柱状图做一些扩展，把数据的百分比显示在头部，如缩略图。

option = {
    backgroundColor: '#040c33',
    grid: {
        top: '25%',
        right: '10%',
        left: '10%',
        bottom: '12%'
    },
    xAxis: [{
        type: 'category',
        color: '#59588D',
        data: ['学员续费率', '试听课转换率', '课程消费率', '课后评分率', '作业完成率', '班级满班率', '排课上课率', '体验课转化率'],
        axisPointer: {
            type: 'line'
        },
        axisLine: {
            lineStyle: {
                color: '#272456'
            }
        },
        axisLabel: {
            margin: 20,
            color: '#59588D',
            textStyle: {
                fontSize: 12
            },
        },
    }],
    yAxis: [{
        min: 0,
        max: 100,
        axisLabel: {
            formatter: '{value}%',
            color: '#59588D',
        },
        axisLine: {
            show: false
        },
        splitLine: {
            lineStyle: {
                color: '#272456'
            }
        }
    }],
    series: [{
        type: 'bar',
        data: [100, 90, 10, 90, 70, 20, 56, 89],
        barWidth: '20px',
        itemStyle: {
            normal: {
                color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [{
                    offset: 0,
                    color: '#41E1D4' // 0% 处的颜色
                }, {
                    offset: 1,
                    color: '#10A7DB' // 100% 处的颜色
                }], false),
                barBorderRadius: [30, 30, 0, 0],
                shadowColor: 'rgba(0,255,225,1)',
                shadowBlur: 4,
            }
        },
        label: {
            normal: {
                show: true,
                lineHeight: 30,
                height: 30,
                backgroundColor: '#252453',
                borderRadius: 200,
                position: ['-8', '-60'],
                distance: 1,
                formatter: [
                    '    {d|●}',
                    ' {a|{b}：{c}%}     \n',
                    '    {b|}'
                ].join(''),
                rich: {
                    d: {
                        color: '#3CDDCF',
                    },
                    a: {
                        color: '#fff',
                        align: 'center',
                    },
                    b: {
                        width: 1,
                        height: 30,
                        borderWidth: 1,
                        borderColor: '#234e6c',
                        align: 'left'
                    },
                }
            }
        }
    }]
};