Swift-从双精度字尾删除零

在Swift 4中，您可以这样做：

extension Double {    func removeZerosFromEnd() -> String {        let formatter = NumberFormatter()        let number = NSNumber(value: self)        formatter.minimumFractionDigits = 0        formatter.maximumFractionDigits = 16 //maximum digits in Double after dot (maximum precision)        return String(formatter.string(from: number) ?? "")    }}

使用示例：

print (Double("128834.567891000").removeZerosFromEnd())

您还可以计算字符串中有多少个十进制数字：

import Foundationextension Double {    func removeZerosFromEnd() -> String {        let formatter = NumberFormatter()        let number = NSNumber(value: self)        formatter.minimumFractionDigits = 0        formatter.maximumFractionDigits = (self.components(separatedBy: ".").last)!.count        return String(formatter.string(from: number) ?? "")    }}