标签：swift
代码如下，输入要保留的小数个数
extension Double {
/// Rounds the double to decimal places value
func roundTo(places:Int) -> Double {
let divisor = pow(10.0, Double(places))
return (self * divisor).rounded() / divisor
}
}
标签：swift
原文地址：http://12942149.blog.51cto.com/12932149/1928937
