echarts 饼状图 扇面上显示 文字和百分比

app.title = '饼图';option = {tooltip: {trigger: 'item',formatter: "{a}
{b}: {c} ({d}%)"},legend: {orient: 'vertical',x: 'left',data:['直达','营销广告','搜索引擎','邮件营销','联盟广告','视频广告','百度','谷歌','必应','其他']},series: [{name:'访问来源',type:'pie',selectedMode: 'single',radius: [0, '80%'], label: {normal: {position: 'inner',formatter: "{b}: {c} ({d}%)"}},labelLine: {normal: {show: false}},data:[{value:335, name:'直达', selected:true},{value:679, name:'营销广告'},{value:1548, name:'搜索引擎'}]},]};