CODEWITHSUNDEEP
swifttextfield
J56
J56

Reputation: 37

I want to only accept the A to Z in my textfield . And do not accept the numbers in swift 5

i created a username textfield and i want my textfield do not accept the numbers in swift 5

i tried this bud didnt work 

func OnlyCharacter(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
 let allowedcharacters = CharacterSet.decimalDigits
 let characterset = CharacterSet(charactersIn: string)
 return allowedcharacters.isSuperset(of: characterset)

 }

Upvotes: 0

Views: 125

Answers (3)

Uma Madhavi
Uma Madhavi

Reputation: 4917

 func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
      let characterSet = CharacterSet.letters //accept letters only here
      if string.rangeOfCharacter(from:characterSet.inverted) != nil {
      return false
    }
    return true
 }

Upvotes: 0

iOSer
iOSer

Reputation: 2336

func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool { 
    let non_digits = NSCharacterSet.letters.inverted
    let range = string.rangeOfCharacter(from: non_digits)
    if range != nil { // found an invalid
        return false
    }
    return true
}

Upvotes: 0

Jogendar Choudhary
Jogendar Choudhary

Reputation: 3494

You have to change only CharacterSet.decimalDigits to NSCharacterSet.letterCharacterSet()

func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
    if string.rangeOfCharacter(from: .letters) != nil {
        return true
    } else {
        return false
    }
}

Upvotes: 1

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