如何屏蔽 Swift 4 中的文本字段？

Question

我想在 textfield.text 中屏蔽电子邮件，但我只得到中间的值。我想从中间获取值到@ gmail.com，如下例所示。

例如：

设 var = 12345678@gmail.com

输出= ****5678@gmail.com

设 var = 123456789@gmail.com

输出= ****56789@gmail.com

    let email = "123456789@gmail.com"

    let components = email.components(separatedBy: "@")

    let result = hideMidChars(components.first!) + "@" + components.last!

    print(result)

输出我得到：****5****@gmail.com

我的期望：****56789@gmail.com

Answer 1

尝试扩展字符串协议并声明一个变量，其中 returns 一个 .init(repeating: ,count):

extension StringProtocol {
    var masked: String {
        return String(repeating: "•", count: Swift.max(0, count - count/2)) + suffix(count/2)
    }
}

用法如下：

let email = "123456789@gmail.com"

print(email.masked)   //"••••••••••gmail.com"

如果您想要显示电子邮件的一部分，只需按如下方式操作后缀（计数 - 3）：

return String(repeating: "•", count: Swift.max(0, count - count/2)) + suffix(count/2)

Answer 2

func hide(email: String) -> String {

    let parts = email.split(separator: "@")
    if parts.count < 2 {
        return email
    }
    let name = parts[0]
    let appendix = parts[1]
    let lenght = name.count
    if lenght == 1 {
        return "*@\(appendix)"
    }
    let semiLenght = lenght / 2

    var suffixSemiLenght = semiLenght
    if (lenght % 2 == 1) {
        suffixSemiLenght += 1
    }

    let prefix = String(repeating: "*", count: semiLenght)
    let lastPart = String(name.suffix(suffixSemiLenght))

    let result = "\(prefix)\(lastPart)@\(appendix)"
    return result
}
let email = "123456789@gmail.com"
let result = hide(email: email)
print(result)

如何屏蔽 Swift 4 中的文本字段？

How to masking textfield in Swift 4?

masking

textfield

swift