onLoad() { //向上取整数(小数舍去,正数部分+1) cc.log(Math.ceil(1.111));//=2 cc.log(Math.ceil(1.6666));//=2 //向下取整数(小数直接舍去) cc.log(Math.floor(1.111));//=1 cc.log(Math.floor(1.666));//=1 //四舍五入 cc.log(Math.round(1.111));//1 cc.log(Math.round(1.666));//2 //保留小数 cc.log(1.1111.toFixed());//1 cc.log(1.1111.toFixed(2));//1.11 cc.log(1.1111.toFixed(3));//1.111 }