swift - 不适用于 swift 4 的 Float

Question

这个问题已经有答案了:

Rounding a double value to x number of decimal places in swift (35 个回答)

已关闭 5 年前。

let value:Float = 5.678434let roundedValue = round(value * 100) / 100

roundedValue 浮点 5.6784339

如何获得 5.67 或 5.68？

Answer 1

extension Float {
    func rounded(toPlaces places:Int) -> Float {
        let divisor = pow(10.0, Float(places))
        return (self * divisor).rounded() / divisor
    }
}

let floatNumber:Float = 3.67565676

print(floatNumber.rounded(toPlaces: 2)) 

//prints 3.68