仅做学习使用，不做任何用途

enum Validate {
    /** 邮箱 */
    case email(_: String)
    /** 手机号码 */
    case phoneNum(_: String)
    /** 车牌号码 */
    case carNum(_: String)
    /** 用户名 */
    case username(_: String)
    /** 密码 */
    case password(_: String)
    /** 昵称 */
    case nickname(_: String)
    /** 网址 */
    case URL(_: String)
    /** IP地址 */
    case IP(_: String)

    /** 是否正确 */
    var isRight: Bool {
        var predicateStr:String!
        var currObject:String!
        switch self {
        case let .email(str):
            predicateStr = "^([a-z0-9_\\.-]+)@([\\da-z\\.-]+)\\.([a-z\\.]{2,6})$"
            currObject = str
        case let .phoneNum(str):
            predicateStr = "^((13[0-9])|(15[^4,\\D]) |(17[0,0-9])|(18[0,0-9]))\\d{8}$"
            currObject = str
        case let .carNum(str):
            predicateStr = "^[A-Za-z]{1}[A-Za-z_0-9]{5}$"
            currObject = str
        case let .username(str):
            predicateStr = "^[A-Za-z0-9]{6,20}+$"
            currObject = str
        case let .password(str):
            predicateStr = "^[a-zA-Z0-9]{6,20}+$"
            currObject = str
        case let .nickname(str):
            predicateStr = "^[\\u4e00-\\u9fa5]{4,8}$"
            currObject = str
        case let .URL(str):
            predicateStr = "^(https?:\\/\\/)?([\\da-z\\.-]+)\\.([a-z\\.]{2,6})([\\/\\w \\.-]*)*\\/?$"
            currObject = str
        case let .IP(str):
            predicateStr = "^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$"
            currObject = str
        }

        let predicate =  NSPredicate(format: "SELF MATCHES %@" ,predicateStr)
        return predicate.evaluateWithObject(currObject)
    }
}

调用

let email = Validate.email("dd_dada23@@163.com").isRight
print(email) // flase

let url = Validate.URL("https://www.baidu.com").isRight
print(url) // true

let ip = Validate.IP("11.11.11.11").isRight 
print(ip) //true