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Sunday, May 19, 2024

ios – Protocol delegate from customized UI button has undesirable impact


I’ve been attempting to create a protocol and delegate between customized UI button and parent-child view controller. Briefly, I’ve a guardian view controller, a toddler view controller, and a customized UI button. Customized UI button and baby VC are beneath guardian VC. I created a protocol delegate for customized UI button and conformed it by guardian VC. I need to change baby VC’s view body origin with a faucet on customized UI button. I additionally need to change the picture of customized UI button once I tapped. Nonetheless, when I attempt to change the picture of customized UI button and likewise name delegate operate, baby VC view has some undesirable impact. Right here is the pattern code:

Father or mother View Controller

class ParentViewController: UIViewController {
    
    let childVC: ChildViewController = {
        let childVC = ChildViewController()
        childVC.view.translatesAutoresizingMaskIntoConstraints = false
        return childVC
    }()
    
    let customButton: CustomUIButton = {
        let button = CustomUIButton(body: .zero)
        button.translatesAutoresizingMaskIntoConstraints = false
        return button
    }()
    
    override func viewDidLoad() {
        tremendous.viewDidLoad()
        view.backgroundColor = .white
        
        setupCustomButton()
        setupChildVC()
    }
    
    override func viewDidLayoutSubviews() {
        tremendous.viewDidLayoutSubviews()
        applyConstraints()
    }
    
    personal func setupCustomButton() {
        view.addSubview(customButton)
        customButton.delegate = self
    }
    
    personal func setupChildVC() {
        addChild(childVC)
        view.addSubview(childVC.view)
        childVC.didMove(toParent: self)
    }
    
    personal func applyConstraints() {
        
        let childVCConstraints = [
            childVC.view.leadingAnchor.constraint(equalTo: view.leadingAnchor),
            childVC.view.trailingAnchor.constraint(equalTo: view.trailingAnchor),
            childVC.view.heightAnchor.constraint(equalToConstant: 65),
            childVC.view.bottomAnchor.constraint(equalTo: view.bottomAnchor, constant: -200)
        ]
        
        let customButtonConstraints = [
            customButton.centerXAnchor.constraint(equalTo: view.centerXAnchor),
            customButton.bottomAnchor.constraint(equalTo: view.bottomAnchor, constant: -50),
            customButton.heightAnchor.constraint(equalToConstant: 70),
            customButton.widthAnchor.constraint(equalToConstant: 70)
        ]
        
        NSLayoutConstraint.activate(childVCConstraints)
        NSLayoutConstraint.activate(customButtonConstraints)
        
    }

    
}

extension ParentViewController: CustomUIButtonDelegate {
    func customUIButtonDidTap() {
        
        self.childVC.updateView()
        
    }
}

Baby View Controller

class ChildViewController: UIViewController {
    
    var isHidden: Bool = false

    override func viewDidLoad() {
        tremendous.viewDidLoad()
        view.backgroundColor = .systemBlue
        

    }
    
    func updateView() {
        if isHidden {
            UIView.animate(withDuration: 0.3) {
                self.view.body.origin.y -= 40
                self.isHidden = false
            }
        } else {
            UIView.animate(withDuration: 0.3) {
                self.view.body.origin.y += 40
                self.isHidden = true
            }
        }
            
        
    }

}

Customized UI Button

protocol CustomUIButtonDelegate: AnyObject {
    func customUIButtonDidTap()
}

class CustomUIButton: UIButton {

    weak var delegate: CustomUIButtonDelegate?
    
    var isDoing: Bool = false
    
    let image1: UIImage = {
        let picture = UIImage(systemName: "chevron.proper") ?? UIImage()
        return picture
    }()
    
    let image2: UIImage = {
        let picture = UIImage(systemName: "chevron.left") ?? UIImage()
        return picture
    }()
    
    override init(body: CGRect) {
        tremendous.init(body: body)
        setTitle("", for: .regular)
        backgroundColor = .systemRed
        layer.cornerRadius = 35
        layer.shadowColor = UIColor.systemCyan.cgColor
        layer.shadowOpacity = 0.8
        layer.shadowOffset = CGSize(width: 0, top: 0)
        
        addTarget(self, motion: #selector(didButtonTapped), for: .touchUpInside)
    }
    
    @objc func didButtonTapped() {
        
        self.isDoing = !isDoing
        self.setImage(isDoing ? image1 : image2 , for: .regular)
        
        delegate?.customUIButtonDidTap()
        
        
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been applied")
    }
    
}

If I dont change the picture of customized UI button, it really works completely. I’m not positive why setting picture of button has this impact.

Customized UI Button goal:

@objc func didButtonTapped() {
        
//        self.isDoing = !isDoing
//        self.setImage(isDoing ? image1 : image2 , for: .regular)

     delegate?.customUIButtonDidTap()
        
}

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