CODEWITHSUNDEEP
iosswiftiboutletunrecognized-selector
user180914
user180914

Reputation: 1

Unrecognized Selector sent to Instance in UI Textfield even after checking IB Outlets

So I'm creating a social media app in Xcode and am trying to create the signup button page. However, I noticed every time I tap on the username, password or any of the other textfields, instead of the ios keyboard popping up I get this error:

unrecognized selector sent to instance

I've looked up how to solve the problem and it says to check your outlets. However, I've checked my outlets a million times and know they are correct. I've even broken and reconnected all of them just to be sure. I know the error pops up when I add the

showKeyboard and hideKeyboard functions. I don't know what to do to figure this out. Any ideas what I am doing wrong?

import UIKit

class sign_upVC: UIViewController {
    
    
    // Profile image
    @IBOutlet weak var AvaImg: UIImageView!
    
    
    // Text fields
    @IBOutlet weak var usernameTxt: UITextField!
    @IBOutlet weak var passwordTxt: UITextField!
    @IBOutlet weak var repeatPassword: UITextField!
    @IBOutlet weak var fullnameTxt: UITextField!
    @IBOutlet weak var bioTxt: UITextField!
    @IBOutlet weak var webTxt: UITextField!
    
    
    // buttons
    @IBOutlet weak var signUpBtn: UIButton!
    @IBOutlet weak var cancelBtn: UIButton!
    
    // scrollView
    @IBOutlet weak var scrollView: UIScrollView!
    
    // reset default size
    var scrollViewHeight : CGFloat = 0
    
    
    // keyboard frame size
    var keyBoard = CGRect()
    
    
    // default func
    override func viewDidLoad() {
        super.viewDidLoad()
        
        
        let scrollView = UIScrollView()
    
        
        // ScrollView frame sizes
        scrollView.frame = CGRect(x: 0,y: 0,width: self.view.frame.width,height: self.view.frame.height)
        scrollView.contentSize.height = self.view.frame.height
        scrollViewHeight = scrollView.frame.size.height
        
        // Check notification if keyboard is shown or not
        NotificationCenter.default.addObserver(self, selector: Selector(("showKeyboard:")), name: UIResponder.keyboardWillShowNotification, object: nil)
        NotificationCenter.default.addObserver(self, selector: Selector(("hideKeyboard:")), name: UIResponder.keyboardWillHideNotification, object: nil)
        
        // declare keyboard if tapped
        let hideTap = UITapGestureRecognizer(target: self, action: Selector(("hideKeyboardTap:")))
        hideTap.numberOfTapsRequired = 1
        self.view.isUserInteractionEnabled = true
        self.view.addGestureRecognizer(hideTap)
    }
    
    // hide keyboard if tapped
    func hideKeyboardTap(recognizer:UITapGestureRecognizer){
        self.view.endEditing(true)
        
    }
    
    // show keyboard
    func showKeyboard(notification:NSNotification){

        // Define keyboard size
        keyBoard = ((notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey]! as AnyObject).cgRectValue)!
        
        // move up UI
        UIView.animate(withDuration: 0.4, animations: { () -> Void in
            self.scrollView.frame.size.height = self.scrollViewHeight - self.keyBoard.height
        })
    
    }
    
    // hide keyboard
    func hideKeyboard(notification:NSNotification){
        
        // move down UI
        UIView.animate(withDuration: 0.4, animations: { () -> Void in
            self.scrollView.frame.size.height = self.view.frame.height
        })
    }
    
    // Tapped sign up
    @IBAction func signUpBtn_Tapped(_ sender: Any) {
        print("Sign up tapped")
    }
    
    
    // Tapped cancel
    @IBAction func cancelBtn_Tapped(_ sender: Any) {
        print("Cancel tapped")
        self.dismiss(animated: true, completion: nil)
    }

}

Upvotes: -1

Views: 675

Answers (1)

matt
matt

Reputation: 534885

Never say stuff like

Selector(("showKeyboard:"))

You don't know how to write the Objective C selector for these methods. Use Swift to help you! Write

#selector(showKeyboard)

And

@objc func showKeyboard(...

And so on.

Upvotes: 2

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