1.中间显示数字

title: {text: '88',x: 'center',y: 'center',textStyle: {color: '#333',fontWeight: 'bolder',fontSize: 64,}
}

2.提示信息

tooltip: {trigger: 'item', // 当鼠标悬浮在某个数据项上时触发},

3.修改中间颜色

默认：

    splitArea: {areaStyle: {color: ['rgba(255, 255, 255, 0.2)','rgba(255, 255, 255, 0.4)','rgba(255, 255, 255, 0.6)','rgba(255, 255, 255, 0.8)','rgba(255, 255, 255, 1)',],},},