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

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Answer 1

Here is a concise version of Joshuas answer in Swift 3, assuming that all validations must be fulfilled.

func validate(password: String) -> Bool {
    let capitalLetterRegEx  = ".*[A-Z]+.*"
    let texttest = NSPredicate(format:"SELF MATCHES %@", capitalLetterRegEx)
    guard texttest.evaluate(with: password) else { return false }

    let numberRegEx  = ".*[0-9]+.*"
    let texttest1 = NSPredicate(format:"SELF MATCHES %@", numberRegEx)
    guard texttest1.evaluate(with: password) else { return false }

    let specialCharacterRegEx  = ".*[!&^%$#@()/_*+-]+.*"
    let texttest2 = NSPredicate(format:"SELF MATCHES %@", specialCharacterRegEx)
    guard texttest2.evaluate(with: password) else { return false }

    return true
}