Developer Forums

UITextField Gesture event argument has been changed on iOS 13.4?

UI Frameworks UIKit UIKit

mineyuki-onizuka OP

Created Mar ’20

Replies 5

Boosts 0

Views 2.6k

Participants 3

Hi.

UITextField Gesture event argument has been changed on iOS 13.4?

Usually, We writing this code when judge gesture type.

open override func gestureRecognizerShouldBegin(_ gestureRecognizer: UIGestureRecognizer) -> Bool {
  // is Tap
  if gestureRecognizer.isKind(of: UITapGestureRecognizer.self) {
      // code
  }
}

But gestureRecognizer.isKind method was return "false" when running on iOS 13.4.

iOS13.3 is "true".

Boost

Mar ’20

In which type of class do you implement this override ?

0

mineyuki-onizuka OP

Mar ’20

This override method is defined on Custome Class of UITextField.

Minimum code is follow.

import UIKit

class ViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
    }
}

class ExTextField : UITextField {
    open override func gestureRecognizerShouldBegin(_ gestureRecognizer: UIGestureRecognizer) -> Bool {

        if let ges = gestureRecognizer as? UITapGestureRecognizer {
            print ("true")
        } else {
            print ("false")
        }
        return true
    }
}

iOS13.4 iPhone Simulator and iOS13.4 iPad Pro(Gen2) is print("false").

iOS13.3 iPhone Simulator and iOS13.3 iPad Pro(Gen2) is print("true").

0

Apr ’20

Just confirming we're seeing this as well.

When receiving taps from a UITextField what was `UITapGestureRecognizer` is now `UITextMultiTapRecognizer`, which is undocumented.

1

Apr ’20

mineyuki, you could test what you get:

class ExTextField : UITextField {
    open override func gestureRecognizerShouldBegin(_ gestureRecognizer: UIGestureRecognizer) -> Bool {

        if let ges = gestureRecognizer as? UITapGestureRecognizer {
            print ("true")
        } else {
            print ("false. Gesture is a ", gestureRecognizer)
        }
        return true
    }
}

How did you define the gesture ? In code ? In IB ?

Just tested a tapGesture created by code:

        let tapLabelGesture = UITapGestureRecognizer(target: self, action: #selector(labelTapped(_:)))
        label.addGestureRecognizer(tapLabelGesture)

    @objc func labelTapped(_ sender: UITapGestureRecognizer) {
        aTextView.text = "Start labelTapped"
        aTextView.isHidden = false
    }

SingleTap tested

- XCode 11.4

- iOS 13.4 simulator

produces the expected result

0

Apr ’20

I tried this with an iOS 13.4 device:

override public func awakeFromNib() {
  let tapRecognizer = UITapGestureRecognizer(target: self, action: #selector(receivedTap))
  addGestureRecognizer(tapRecognizer)
}

@objc func receivedTap(_ gestureRecognizer: UIGestureRecognizer) {
}
 
override public func gestureRecognizerShouldBegin(_ gestureRecognizer: UIGestureRecognizer) -> Bool {  
  NSLog("gestureRecognizerShouldBegin")
}

If I break in gestureRecognizerShouldBegin in the debugger I first get

po gestureRecognizer
<UITextMultiTapRecognizer: 0x144925620 (UITextInteractionNameSingleTap); state = Possible; delaysTouchesEnded = NO; view = <GreyTextField 0x150650000>; target= <(action=onStateUpdate:, target=<UITextMultiTapRecognizer 0x144925620>)>>

Followed by the UITapGestureRecognizer we are expecting.
This a behaviour change. Prior to 13.4 we would get a UITapGestureRecognizer from built-in gesture recognizers in UITextField, in 13.4 we do not and need to define the gesture directly.

0

Q