Long press delete key of a custom keyboard in swift

Question

I am making a custom keyboard. The delete key in the keyboard works fine for single tap. But it does not work for long press.I want to implement the long press on the delete key so that when the user holds down the delete button, the keyboard continuously deletes like in the standard ios keyboard. I referred to a couple of solutions on Stackoverflow, like- https://stackoverflow.com/a/26234876/6077720, https://stackoverflow.com/a/25633313/6077720, https://stackoverflow.com/a/30711421/6077720

But none of it worked for me. I also tried this code:

  override func viewDidLoad() {
    super.viewDidLoad()
    textDocument = self.textDocumentProxy

    var longPress = UILongPressGestureRecognizer(target: self, action: #selector(self.longPress))
    self.deleteKeyPressed.addGestureRecognizer(longPress)
}

func longPress(gesture: UILongPressGestureRecognizer) {
    if gesture.state == .Ended {
        print("Long Press")
        self.textDocumentProxy.deleteBackward()

    }
}

But after writing this code my keyboard does not appear only. Can anyone please help me?

@KetanParmar yes the keyboard does not display at all, after adding this code for delete button. Before that it worked properly — Khadija Daruwala, Aug 31 '16 at 11:17

aatalyk · Accepted Answer · 2016-08-31T12:25:43.023

13

Try this code below

var timer: NSTimer?

override func viewDidLoad() {
   super.viewDidLoad()
   textDocument = self.textDocumentProxy

   var longPressRecognizer = UILongPressGestureRecognizer(target: self, action: #selector(KeyboardViewController.longPressHandler(_:)))

   eraseButton.addGestureRecognizer(longPressRecognizer)
}

func longPressHandler(gesture: UILongPressGestureRecognizer) {
    if gesture.state == .Began {
        timer = NSTimer.scheduledTimerWithTimeInterval(0.1, target: self, selector: #selector(KeyboardViewController.handleTimer(_:)), userInfo: nil, repeats: true)
    } else if gesture.state == .Ended || gesture.state == .Cancelled {
        timer?.invalidate()
        timer = nil
    }
}

func handleTimer(timer: NSTimer) {
    self.deleteText()
}

edited Aug 31 '16 at 12:25

answered Aug 31 '16 at 12:21

aatalyk

391
4
15

what timer do i use? – Khadija Daruwala Aug 31 '16 at 12:24
Use timer for the purpose of deleting text faster – aatalyk Aug 31 '16 at 12:27
i tired as you said but the keyboard is still not loading – Khadija Daruwala Aug 31 '16 at 12:33
without the long press implementation it works fine with just one tap on the delete button – Khadija Daruwala Sep 01 '16 at 03:10

score 0 · Answer 2 · answered Feb 15 '17 at 17:24

0

 override func viewDidLoad() {
    super.viewDidLoad()
    let longPress = UILongPressGestureRecognizer(target: self, action: #selector(KBViewController.handleLongPress(_:)))
    longPress.minimumPressDuration = 0.5
    longPress.numberOfTouchesRequired = 1
    longPress.allowableMovement = 0.5
    row3B11.addGestureRecognizer(longPress)

}

    func handleLongPress(_ gestureRecognizer: UIGestureRecognizer) {
    textDocumentProxy.deleteBackward()
}

answered Feb 15 '17 at 17:24

Jeacovy Gayle

447
9
9

Some explanation what this code does and why it solves the problem would improve the answer quite a lot. – JJJ Feb 15 '17 at 17:44

score 0 · Answer 3 · answered Jul 27 '18 at 06:26

0

Your code is ok

please remove end gesture condition from your code, It will work fine

@objc func btnDeleteLongPress(gesture : UILongPressGestureRecognizer)
{
    self.textDocumentProxy.deleteBackward()
}

answered Jul 27 '18 at 06:26

Anjali jariwala

410
5
15

Long press delete key of a custom keyboard in swift

3 Answers3

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