/Swift/Swift uitextfield only numbers keyboard lock programmatically

Swift uitextfield only numbers keyboard lock programmatically

class ViewController: UIViewController, UITextFieldDelegate {

    @IBOutlet weak var textField: UITextField!

    override func viewDidLoad() {
        super.viewDidLoad()

        // you can set the following two properties for the text field in Interface Builder, if you'd prefer

        textField.delegate = self
        textField.keyboardType = .numberPad
    }

    func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
        let invalidCharacters = CharacterSet(charactersIn: "0123456789").inverted
        return string.rangeOfCharacter(from: invalidCharacters) == nil
    }

    // or, alternatively:
    //
    // func textField(textField: UITextField, shouldChangeCharactersInRange range: NSRange, replacementString string: String) -> Bool {
    //     return string.range(of: "^\\d*$", options: .regularExpression) != nil
    // }

}

Source: stackoverflow.com

Similar codes

0 vote141 views1 answer
How to load Google map styling from json file for ios swift?
Swift
0 vote156 views1 answer
How to set the spacing of a collection view swift
Swift
1 vote119 views1 answer
Swift play video in uiview
Swift
0 vote167 views1 answer
Xcode how to know which textfield is selected
Swift
0 vote151 views2 answers
Get keyboard height swift
Swift
5 votes187 views2 answers
Disable dark mode swift
Swift
0 vote148 views1 answer
Set time programmatically swift
Swift
0 vote184 views1 answer
Swiftui datepicker text color
Swift
0 vote151 views1 answer
Ios make http request
Swift
0 vote172 views1 answer
Caseiterable swift
Swift