Check if a string contains at least a upperCase letter, a digit, or a special character in Swift?

Question

I am trying to create a method that finds whether a string contains a number , Upper case letter and a special character using regular expression as below

 func         


        

Answer 1

At least 1 Uppercase, 1 Lowercase, 1 Special Characters, 1 Number, and Total 8 Characters.

To support all special characters listed in https://www.owasp.org/index.php/Password_special_characters

!"#$%&'()*+,-./:;<=>?@[]^_`{|}~

extension String {
    func isValidPassword() -> Bool {
        //let passwordRegex = "^(?=.*[a-z])(?=.*[A-Z])(?=.*\\d)(?=.*[ !\"\\\\#$%&'()*+,-./:;<=>?@\\[\\]^_`{|}~])[A-Za-z\\d !\"\\\\#$%&'()*+,-./:;<=>?@\\[\\]^_`{|}~]{8,}"
        //safe to escape all regex chars
        let passwordRegex = "^(?=.*[a-z])(?=.*[A-Z])(?=.*\\d)(?=.*[ !\"\\\\#$%&'\\(\\)\\*+,\\-\\./:;<=>?@\\[\\]^_`\\{|\\}~])[A-Za-z\\d !\"\\\\#$%&'\\(\\)\\*+,\\-\\./:;<=>?@\\[\\]^_`\\{|\\}~]{8,}"
        return NSPredicate(format: "SELF MATCHES %@", passwordRegex).evaluate(with: self)
    }
}