1、简介

在App开发中，涉及到用户登录时，我们经常需要检验用户输入的账户是否是我们指定的类型。例如判断用户的账号是不是正确的手机号、邮箱等。

2、实现

在Swift里我们可以通过如下代码轻松的实现字段串相关类型的判断

import Foundation

extension String {

    func isvalitemobile() -> Bool {
        let mobileRegex = "^((13[0-9])|(15[^4,\\D])|(18[0,0-9])|(17[0,0-9]))\\d{8}$"
        let mobileTest:NSPredicate = NSPredicate(format: "SELF MATCHES %@", mobileRegex)
        return mobileTest.evaluate(with: self)
    }
    
    func isvaliteemail() -> Bool {
        let emailRegex = "[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}"
        let emailTest:NSPredicate = NSPredicate(format: "SELF MATCHES %@", emailRegex)
        return emailTest.evaluate(with: self)
    }
    
    func isvaliteidnum() -> Bool {
        let idRegex = "^(\\d{14}|\\d{17})(\\d|[xX])$"
        let idTest:NSPredicate = NSPredicate(format: "SELF MATCHES %@", idRegex)
        return idTest.evaluate(with: self)
    }
    
}