/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

2 votes264 views1 answer
Swift change status bar color
Swift
3 votes256 views1 answer
Show back button in navbar swift
Swift
0 vote263 views1 answer
Stack view swift 5 add spacing
Swift
0 vote270 views1 answer
Swift rounded tab bar
Swift
1 vote246 views1 answer
How to dismiss keyboard swiftui
Swift
0 vote272 views1 answer
Filter text list swiftui
Swift
1 vote247 views1 answer
Remove padding hstack swiftui
Swift
1 vote287 views1 answer
Pop last element array swift
Swift
0 vote218 views2 answers
Let values = [3.0,6.0,9.0,1.0] let squares = values.map {$0 * $0} print(squares)
Swift
5 votes254 views1 answer
Use timer swift
Swift