How to pressed a UIButton within a customized TableviewCell? - ios

Question

I have been looking all throughout SO on how to interact with a UIButton within a customized tableview cell. All of the answers I have seen are using IBOutlets, however I have not seen a way to do this fully programmatically. I am use to interacting with buttons via button.addTarget. Here are my two ViewControllers, one being the customized tableviewcell and the other being the ViewController.
Here is my customized. I tried using a protocol delegate route, however this has failed.
import UIKit
#objc protocol TableViewNew {
func onClickCell()
}
class NewMoveTableViewCell: UITableViewCell {
var cellDelegate: TableViewNew?
static let identifier = "NewTableViewCell"
private let myImageView: UIImageView = {
let imageView = UIImageView()
imageView.clipsToBounds = true
imageView.contentMode = .scaleAspectFill
imageView.layer.masksToBounds = true
imageView.backgroundColor = .purple
imageView.layer.cornerRadius = 80/2
return imageView
}()
private let myLabel : UILabel = {
let label = UILabel()
label.text = "test"
label.backgroundColor = .blue
label.textColor = .systemPink
label.adjustsFontSizeToFitWidth = true
label.textAlignment = .center
return label
}()
private let button: UIButton = {
let button = UIButton()
button.setTitle("Invite", for: .normal)
button.backgroundColor = .systemPink
button.layer.cornerRadius = 10
return button
}()
override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
super.init(style: style, reuseIdentifier: reuseIdentifier)
addSubview(myImageView)
addSubview(myLabel)
addSubview(button)
setImageConstratins()
setTitleLabelConstraints()
setButton()
}
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
func setImageConstratins() {
myImageView.translatesAutoresizingMaskIntoConstraints = false
myImageView.centerYAnchor.constraint(equalTo: centerYAnchor).isActive = true
myImageView.leadingAnchor.constraint(equalTo: leadingAnchor, constant: 12).isActive = true
myImageView.heightAnchor.constraint(equalToConstant: 80).isActive = true
myImageView.widthAnchor.constraint(equalToConstant: 80).isActive = true
}
func setTitleLabelConstraints() {
myLabel.translatesAutoresizingMaskIntoConstraints = false
myLabel.centerYAnchor.constraint(equalTo: centerYAnchor).isActive = true
myLabel.leadingAnchor.constraint(equalTo: myImageView.trailingAnchor, constant: 5).isActive = true
myLabel.heightAnchor.constraint(equalToConstant: 80).isActive = true
//myLabel.trailingAnchor.constraint(equalTo: button.leadingAnchor, constant: -12).isActive = true
}
func setButton() {
button.translatesAutoresizingMaskIntoConstraints = false
button.centerYAnchor.constraint(equalTo: centerYAnchor).isActive = true
button.leadingAnchor.constraint(equalTo: myLabel.trailingAnchor, constant: -5).isActive = true
button.heightAnchor.constraint(equalToConstant: 80).isActive = true
button.widthAnchor.constraint(equalToConstant: 150).isActive = true
button.trailingAnchor.constraint(equalTo: trailingAnchor, constant: -12).isActive = true
}
public func configure(with name: String, label: String) {
myLabel.text = label
myImageView.image = UIImage(named: name)
}
override func prepareForReuse() {
super.prepareForReuse()
myLabel.text = nil
myImageView.image = nil
}
#objc func didTapButton(_ sender: Any) {
cellDelegate?.onClickCell()
}
}
Secondly, here is the ViewController that the TableView is within.
import UIKit
class NewMoveViewController: UIViewController {
private let tableView: UITableView = {
let tableView = UITableView()
tableView.rowHeight = 100
return tableView
}()
private var collectionView: UICollectionView?
override func viewDidLoad() {
super.viewDidLoad()
view.addSubview(tableView)
let layout = UICollectionViewFlowLayout()
layout.scrollDirection = .horizontal
layout.itemSize = CGSize(width: 50, height: 50)
collectionView = UICollectionView(frame: .zero, collectionViewLayout: layout)
collectionView?.register(NewMoveCollectionViewCell.self, forCellWithReuseIdentifier: NewMoveCollectionViewCell.identifier)
collectionView?.showsHorizontalScrollIndicator = false
title = "Add to Group"
tableView.register(NewMoveTableViewCell.self, forCellReuseIdentifier: NewMoveTableViewCell.identifier)
tableView.delegate = self
tableView.dataSource = self
collectionView?.backgroundColor = .systemBlue
collectionView?.dataSource = self
collectionView?.delegate = self
guard let myCollection = collectionView else {
return
}
view.addSubview(myCollection)
// Do any additional setup after loading the view.
}
override func viewDidLayoutSubviews() {
super.viewDidLayoutSubviews()
collectionView?.frame = CGRect(x: 0, y: 100, width: view.frame.size.width, height: 50)
tableView.frame = CGRect(x: 0, y: 200, width: view.frame.size.width, height: view.frame.size.height)
}
}
extension NewMoveViewController : UITableViewDelegate, UITableViewDataSource {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 10
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: NewMoveTableViewCell.identifier, for: indexPath) as! NewMoveTableViewCell
cell.cellDelegate = self
cell.configure(with: "", label: "test")
return cell
}
func tableView(_ tableView: UITableView, shouldHighlightRowAt indexPath: IndexPath) -> Bool {
return false
}
}
extension NewMoveViewController : UICollectionViewDelegate, UICollectionViewDataSource {
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return 1
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: NewMoveCollectionViewCell.identifier, for: indexPath) as! NewMoveCollectionViewCell
return cell
}
}
extension NewMoveViewController : TableViewNew {
func onClickCell() {
print("Pressed")
}
I conformed this ViewController to the protocol from the customized cell and put the function within the cell's cellForRowAt function. When I use this route, I run my app and everything comes up fine, however when I try to click on the customized tableviewcell within the viewcontroller, nothing happens. Any help would be greatly appreciated.

Answer 1

you need to add the action handler to your button:
button.addTarget(self, action: #selector(didTapButton(sender:)), for: .touchUpInside)