Swift String extension checking if String contains valid email address

String+isValidEmail.swift

import Foundation

extension String {
    var isValidEmail: Bool {
        let emailRegEx = "[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,64}"

        let emailTest = NSPredicate(format: "SELF MATCHES %@", emailRegEx)
        return emailTest.evaluate(with: self)
    }
}