Max length UITextField

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When I've tried How to you set the maximum number of characters that can be entered into a UITextField using swift?, I saw that if I use all 10 characters, I can't erase the character too.

The only thing I can do is to cancel the operation (delete all the characters together).

Does anyone know how to not block the keyboard (so that I can't add other letters/symbols/numbers, but I can use the backspace)?

Set the maximum character length of a UITextField in Swift, Your view controller should conform to UITextFieldDelegate , like below: class MyViewController: UIViewController, UITextFieldDelegate { }. Set the delegate of​  How to limit the number of characters in a UITextField? I need to to display max 10 characters. func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool { guard let textFieldCadena = textField.text, let range = Range(range, in: textFieldCadena) else { return false } let nuevaCadena = textFieldCadena.replacingCharacters(in

I do it like this:

func checkMaxLength(textField: UITextField!, maxLength: Int) {
    if (countElements(textField.text!) > maxLength) {
        textField.deleteBackward()
    }
}

The code works for me. But I work with storyboard. In Storyboard I add an action for the text field in the view controller on editing changed.

How to limit the number of characters in a UITextField or UITextView , If you have a UITextField or UITextView and want to stop users typing in I've specified 16 as the maximum number of characters, but just  Questions: How can I set the maximum amount of characters in a UITextField on the iPhone SDK when I load up a UIView? Answers: While the UITextField class has no max length property, it’s relatively simple to get this functionality by setting the text field’s delegate and implementing the following delegate method: Objective-C - (BOOL)textField:(UITextField

Update for Swift 4

 func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
     guard let text = textField.text else { return true }
     let newLength = text.count + string.count - range.length
     return newLength <= 10
}

Apply max length to UITextField in swift · GitHub, Hi, if the maximum length I want to give it only to 2 textfields out of 5? you need to check which textField is in the guard statement: func textField(_ textField:  extension UITextField { /// Runtime key private struct AssociatedKeys { /// max lenght key static var maxlength: UInt8 = 0 /// temp string key static var tempString: UInt8 = 0 } /// Limit the maximum input length of the textfiled @IBInspectable var maxLength: Int { get { return objc_getAssociatedObject(self, &AssociatedKeys.maxlength) as?

Add More detail from @Martin answer

// linked your button here
@IBAction func mobileTFChanged(sender: AnyObject) {
    checkMaxLength(sender as! UITextField, maxLength: 10)
}

// linked your button here
@IBAction func citizenTFChanged(sender: AnyObject) {
    checkMaxLength(sender as! UITextField, maxLength: 13)
}

func checkMaxLength(textField: UITextField!, maxLength: Int) {
    // swift 1.0
    //if (count(textField.text!) > maxLength) {
    //    textField.deleteBackward()
    //}
    // swift 2.0
    if (textField.text!.characters.count > maxLength) {
        textField.deleteBackward()
    }
}

Max character limit of UITextField and allowed characters Swift, Set maximum character limit to UITextField in just one line of code. Restrict allowed characters UITextField using enum in just one line. Now we are going set max characters limit to 10. In our viewDidLoad function just write one line of code as below. override func viewDidLoad() { super.viewDidLoad() // Do any additional setup after loading the view, typically from a nib. self.textField.delegate = self self.textField.maxLength = 10 } Now run the code

In Swift 4

10 Characters limit for text field and allow to delete(backspace)

func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
        if textField ==  userNameFTF{
            let char = string.cString(using: String.Encoding.utf8)
            let isBackSpace = strcmp(char, "\\b")
            if isBackSpace == -92 {
                return true
            }
            return textField.text!.count <= 9
        }
        return true
    }

How to find String length in Swift using count() function? Examples, How do I restrict UITextField to take only numbers in Swift? ios - single - xcode swift uitextview max length Max length UITextField (11) When I've tried How to you set the maximum number of characters that can be entered into a UITextField using swift?

Set maximum length of textfield fo…, How do I find the length of a string in Swift? If you have a UITextField or UITextView and want to stop users typing in more than a certain number of letters, you need to set yourself as the delegate for the control then implement either shouldChangeCharactersIn (for text fields) or shouldChangeTextIn (for text views).

Best Way to Limit Number of Characters in a Text , Note: Each textfield will have a different maximum length. So far I have tried: func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange,  Maximum number of rows to display when multiline option is set to true. select: bool: false: Render a Select element while passing the Input element to Select as input parameter. If this option is set you must pass the options of the select as children. SelectProps: object: Props applied to the Select element. size 'medium' | 'small' The size

How to limit the number of characters in a UITextField, class ViewController: UIViewController, UITextFieldDelegate { @IBOutlet weak var textField: UITextField! override func viewDidLoad() { super.viewDidLoad() self​. Apply max length to UITextField in swift. GitHub Gist: instantly share code, notes, and snippets.

Comments
  • Do you just put this code in your view controller class? Or do I have to make connections?
  • If someone needs to put some condition..you can do like this.. . if (textField .isEqual(mobileNumberTextfield)) { guard let text = textField.text else { return true } let newLength = text.characters.count + string.characters.count - range.length return newLength <= limitLength; } return true;
  • For Swift 4, text.characters.count is deprecated use text.count
  • countElements has been changed to count in Swift 2, but changing that works for me!
  • Thanks, you can use now textField.text?.characters.count since countElements has been changed.
  • Tks, it worked great with this change: countElements(textField.text!) in Swift 2 is: textField.text?.characters.count
  • count(textField.text!) gives an error. You must use textField.text!.characters.count
  • Thanks @RegisSt-Gelais , It's already an old answer, I updated it now
  • Nice, clean code. But for some reason this causes weird editing behavior when you use emojis. The cursor skips to the end of the line every time you try to edit.
  • If you want to support emoji and such use: if (range.length + range.location > count(textField.text.utf16)){ return false; }
  • I like the Toast UIView extension :)
  • Your code is wrong. 1. You have to declare your constant or variable with let or var in Swift (not NSUInteger). 2. textField.text and string are of type String. Length is not a property/method of String in Swift.