How can I fix action button after update Xcode12?

How can I fix these functions?

Hard to say anything sure with the limited info.

The method and the property are both defined in the same class?
How your addButton is added to the view controller?

did not working gives no info about what's happening.

Have you put breakpoints? Or some print statements?

addButton on the custom tableview cell. It is all working before the update Xcode.

Add functions on same class but in custom cell view have button's properties.

addButton on the custom tableview cell.

Please show whole code of the custom tableview cell. I cannot make your code work even in older Xcode.

I'm sure the problem isn't caused by this but here my custom tableview cell whole code:

Code Block 
class customCell: UITableViewCell {
    
    
    let testdetails = testdetail()
    
    var count = 0
    
     let cellView: UIView = {
               let view = UIView()
               view.backgroundColor = .white
               return view
           }()
           
           let imageOrderForCell: UIImageView = {
               let iv = UIImageView()
               iv.contentMode = .scaleAspectFit
               iv.image = UIImage(named: "checked")
               return iv
           }()
           
           let sepetLabel: UILabel = {
               let label = UILabel()
               label.text = "sepetteki ürün"
               label.textColor = .darkGray
               label.font = UIFont(name:"Comfortaa-Bold", size: 15)
               label.translatesAutoresizingMaskIntoConstraints = false
               return label
           }()
           
           let countBasketLabel: UILabel = {
               let countLabel = UILabel()
               countLabel.text = "x0"
               countLabel.textColor = .orange
               countLabel.font = UIFont(name:"Comfortaa-Bold", size: 15)
               countLabel.translatesAutoresizingMaskIntoConstraints = false
               return countLabel
           }()
           
           let priceBasketLabel: UILabel = {
               let pricelabel = UILabel()
               pricelabel.textColor = .black
               pricelabel.font = UIFont(name:"Comfortaa-Bold", size: 15)
               return pricelabel
           }()
           
           let deleteButton: UIButton = {
               let button = UIButton(type: .system)
               button.setImage(UIImage(named: "delete"), for: .normal)
               button.tintColor = .black
               button.layer.cornerRadius = 5
               button.addTarget(self, action: #selector(testdetail.deleteAction(sender:)), for: .touchUpInside)
               return button
           }()
           lazy var addButton: UIButton = {
               let button = UIButton(type: .system)
               button.setImage(UIImage(named: "add"), for: .normal)
               button.tintColor = .black
               button.layer.cornerRadius = 5
               return button
           }()
           
           override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
               super.init(style: style, reuseIdentifier: reuseIdentifier)
               setup()
           }
           
           required init?(coder aDecoder: NSCoder) {
               fatalError("init(coder:) has not been implemented")
           }
           
           
           func setup() {
               backgroundColor = .clear
               addSubview(cellView)
               cellView.addSubview(sepetLabel)
               cellView.addSubview(priceBasketLabel)
               cellView.addSubview(countBasketLabel)
               cellView.addSubview(addButton)
               cellView.addSubview(deleteButton)
               
               cellView.anchor(top: topAnchor, left: leftAnchor, bottom: bottomAnchor, right: rightAnchor, paddingTop: 4, paddingLeft: 8, paddingBottom: 4, paddingRight: 8, width: 40, height: 40)
               
               sepetLabel.anchor(top: nil, left: cellView.leftAnchor, bottom: nil, right: rightAnchor, paddingTop: 0, paddingLeft: 6, paddingBottom: 0, paddingRight: 0, width: 25, height: 25)
               sepetLabel.centerYAnchor.constraint(equalTo: cellView.centerYAnchor).isActive = true
               
               
               priceBasketLabel.anchor(top: nil, left: nil, bottom: nil, right: deleteButton.leftAnchor, paddingTop: 0, paddingLeft: 10, paddingBottom: 0, paddingRight: 20, width: 0, height: 35)
               priceBasketLabel.centerYAnchor.constraint(equalTo: sepetLabel.centerYAnchor).isActive = true
               
               
               countBasketLabel.anchor(top: nil, left: nil, bottom: nil, right: addButton.leftAnchor, paddingTop: 0, paddingLeft: 1, paddingBottom: 0, paddingRight: 1, width: 30, height: 25)
               countBasketLabel.centerYAnchor.constraint(equalTo: sepetLabel.centerYAnchor).isActive = true
        
               
           
               addButton.anchor(top: nil, left: nil, bottom: nil, right: rightAnchor, paddingTop: 0, paddingLeft: 2, paddingBottom: 0, paddingRight: 8, width: 30, height: 30)
               addButton.centerYAnchor.constraint(equalTo: sepetLabel.centerYAnchor).isActive = true
               
               deleteButton.anchor(top: nil, left: nil, bottom: nil, right: countBasketLabel.leftAnchor, paddingTop: 0, paddingLeft: 2, paddingBottom: 0, paddingRight: 8, width: 30, height: 30)
               deleteButton.centerYAnchor.constraint(equalTo: sepetLabel.centerYAnchor).isActive = true
           }
}

here my custom tableview cell whole code: 

Your code lacks class header: class ClassName {

And the most important line:

Code Block 
			 button.addTarget(self, action: #selector(testdetail.addAction(sender:)), for: .touchUpInside)

This line does not exist in the whole code version of the addButton.

Which is the right code you are testing?

I replaced that because I try to solve it but in original version is my first post. The problem continues.

Also I have class header of course.

When you post code, you should Paste and Match style to avoid all the extra blank lines.
What is test detail ? Is it a func ?

cellView has no frame defined.
UIView doc states:

init(frame:) - It is recommended that you implement this method. You can also implement custom initialization methods in addition to, or instead of, this method.

So you should change line 8 in something like

Code Block 
        let view = UIView(frame: CGRect(x: 0, y: 0, width: 100, height: 40))

Code Block 
class customCell: UITableViewCell {
    
    let testdetails = testdetail()
    
    var count = 0
    
    let cellView: UIView = {
        let view = UIView()
        view.backgroundColor = .white
        return view
    }()
    
    let imageOrderForCell: UIImageView = {
        let iv = UIImageView()
        iv.contentMode = .scaleAspectFit
        iv.image = UIImage(named: "checked")
        return iv
    }()
    
    let sepetLabel: UILabel = {
        let label = UILabel()
        label.text = "sepetteki ürün"
        label.textColor = .darkGray
        label.font = UIFont(name:"Comfortaa-Bold", size: 15)
        label.translatesAutoresizingMaskIntoConstraints = false
        return label
    }()
    
    let countBasketLabel: UILabel = {
        let countLabel = UILabel()
        countLabel.text = "x0"
        countLabel.textColor = .orange
        countLabel.font = UIFont(name:"Comfortaa-Bold", size: 15)
        countLabel.translatesAutoresizingMaskIntoConstraints = false
        return countLabel
    }()
    
    let priceBasketLabel: UILabel = {
        let pricelabel = UILabel()
        pricelabel.textColor = .black
        pricelabel.font = UIFont(name:"Comfortaa-Bold", size: 15)
        return pricelabel
    }()
    
    let deleteButton: UIButton = {
        let button = UIButton(type: .system)
        button.setImage(UIImage(named: "delete"), for: .normal)
        button.tintColor = .black
        button.layer.cornerRadius = 5
        button.addTarget(self, action: #selector(testdetail.deleteAction(sender:)), for: .touchUpInside)
        return button
    }()
    lazy var addButton: UIButton = {
        let button = UIButton(type: .system)
        button.setImage(UIImage(named: "add"), for: .normal)
        button.tintColor = .black
        button.layer.cornerRadius = 5
        return button
    }()
    
    override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
        super.init(style: style, reuseIdentifier: reuseIdentifier)
        setup()
    }
    
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    
    func setup() {
        backgroundColor = .clear
        addSubview(cellView)
        cellView.addSubview(sepetLabel)
        cellView.addSubview(priceBasketLabel)
        cellView.addSubview(countBasketLabel)
        cellView.addSubview(addButton)
        cellView.addSubview(deleteButton)
        
        cellView.anchor(top: topAnchor, left: leftAnchor, bottom: bottomAnchor, right: rightAnchor, paddingTop: 4, paddingLeft: 8, paddingBottom: 4, paddingRight: 8, width: 40, height: 40)
        
        sepetLabel.anchor(top: nil, left: cellView.leftAnchor, bottom: nil, right: rightAnchor, paddingTop: 0, paddingLeft: 6, paddingBottom: 0, paddingRight: 0, width: 25, height: 25)
        sepetLabel.centerYAnchor.constraint(equalTo: cellView.centerYAnchor).isActive = true
        
        priceBasketLabel.anchor(top: nil, left: nil, bottom: nil, right: deleteButton.leftAnchor, paddingTop: 0, paddingLeft: 10, paddingBottom: 0, paddingRight: 20, width: 0, height: 35)
        priceBasketLabel.centerYAnchor.constraint(equalTo: sepetLabel.centerYAnchor).isActive = true
        
        countBasketLabel.anchor(top: nil, left: nil, bottom: nil, right: addButton.leftAnchor, paddingTop: 0, paddingLeft: 1, paddingBottom: 0, paddingRight: 1, width: 30, height: 25)
        countBasketLabel.centerYAnchor.constraint(equalTo: sepetLabel.centerYAnchor).isActive = true
        
        addButton.anchor(top: nil, left: nil, bottom: nil, right: rightAnchor, paddingTop: 0, paddingLeft: 2, paddingBottom: 0, paddingRight: 8, width: 30, height: 30)
        addButton.centerYAnchor.constraint(equalTo: sepetLabel.centerYAnchor).isActive = true
        
        deleteButton.anchor(top: nil, left: nil, bottom: nil, right: countBasketLabel.leftAnchor, paddingTop: 0, paddingLeft: 2, paddingBottom: 0, paddingRight: 8, width: 30, height: 30)
        deleteButton.centerYAnchor.constraint(equalTo: sepetLabel.centerYAnchor).isActive = true
    }
}

but in original version is my first post.

Then I can assure you that the code in your first post never works even in Xcode 11.
Your issue is not the problem of Xcode 12, but the modification you have done to the once-worked code.

Also I have class header of course.

You should have included it.

I replaced that because I try to solve

I guess you have replaced too much from the code which once worked.

The line that I have shown as the most important would never work neither in Xcode 11 nor in Xcode 12.

Code Block 
       button.addTarget(self, action: #selector(testdetail.deleteAction(sender:)), for: .touchUpInside)

Code Block 
			 button.addTarget(self, action: #selector(testdetail.addAction(sender:)), for: .touchUpInside)

Inside the instance method of CustomCell, self represents an instace of CustomCell.
It does not have a method named deleteAction(sender:) nor addAction(sender:). So, these lines just cause runtime error (even in Xcode 11).
(I have renamed customCell to CustomCell, as type identifiers of Swift should start with Capital letter.)

I have the same issue. It seems that buttons in a UItableViewCell behave differently between iOS 13 and iOS 14. I guess the touch events are not properly received by the buttons. Probably the UITableView is intercepting them?

How do you present the view with the UITableView ?

If presentation mode is Automatic (allowing to dismiss the view with a swipe down), then it may cause problem for some gestures.

Could it be the case here ?

Could you check presentation mode and try to replace by Full screen, just to confirm ?

I am having the same issue. Here is my boiler plate code to recreate it.

This is the ViewController Class:

Code Block swift
import UIKit
class SecondScreen: UITableViewController {
    
    private let anotherButtonIdentifier = "AnotherButtonCell"
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        tableView.register(AnotherCustomCell.self, forCellReuseIdentifier: anotherButtonIdentifier)
    }
    
    override func numberOfSections(in tableView: UITableView) -> Int {
        return 1
    }
    
    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return 1
    }
    
    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        
        let cell = tableView.dequeueReusableCell(withIdentifier: anotherButtonIdentifier, for: indexPath) as! AnotherCustomCell
                    
        return cell
    }
}

Here is the custom Cell code:

Code Block swift
import UIKit
class AnotherCustomCell: UITableViewCell {
    
    override func awakeFromNib() {
        super.awakeFromNib()
    }
    
    override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
        super.init(style: style, reuseIdentifier: reuseIdentifier)
        
        self.backgroundColor = .red
        
        let button:UIButton = UIButton(frame: CGRect(x: 0, y: 0, width: 100, height: 50))
        button.backgroundColor = .black
        button.setTitle("Button", for: .normal)
        button.addTarget(self, action:#selector(self.handleButtonClick(sender:)), for: .touchUpInside)
        self.addSubview(button)
        
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    @objc private func handleButtonClick(sender: UIButton) {
        print("Button click")
    }
}

I used two simulators. The first one 13.5 works as expected and the console puts out the output. The second simulator with 14.0 doesnt allow me to click the button. Nothing happens. Seems that the button is in the background or something. Any ideas?

I have this issue as well, but only have the problem when building with Xcode 12 on iOS 14. Building the same code from Xcode 11.5 or running on 13.5 works as expected.

@klo

 Here is my boiler plate code to recreate it.

Thanks for showing the working code. It runs fine when built with Xcode 11.7 (in simulator 13.7 and 14.0), and the button does not respond when built with Xcode 12.
Now, I can examine what's going on.

@klo

Seems that the button is in the background or something. Any ideas?

As far as I tried, adding this line to init(style:reuseIdentifier:) made the button respond to tap.

Code Block 
        self.contentView.isUserInteractionEnabled = true

Please try with your actual project.

@OOPer

As far as I tried, adding this line to init(style:reuseIdentifier:) made the button respond to tap.
Code Block

Code Block 
 self.contentView.isUserInteractionEnabled = true

AWESOME! That fixed the issue for me. In my opinion this seems to be a bug. I tried your code and then looked if they changed the default behavior. Apparently it is already enough to call:

Code Block swift
print("Userinteraction: \(self.contentView.isUserInteractionEnabled)")

By printing out the value, without changing it, already allows me to use the buttons again. Seems like a bug to me, what do you think @OOper?