Swift UISwitch Button with Label - uitableview

Question

I am receiving data from API . The data field is displayed with two Label control, Id and status . Here is the screenshot .
I have another view where I created switch button and label programatically. I want to change the status to false when user turn on to switch button but it now updating the value . Here is the code and function i defined .
class DetailsViewController : UIViewController{
#IBOutlet private weak var tableView: UITableView!
var changeStatus: ((Bool, String) -> Void)?
var identifier = ""
private let switchControl: UISwitch = {
let switchControl = UISwitch()
switchControl.translatesAutoresizingMaskIntoConstraints = false
switchControl.isOn = false
return switchControl
}()
#IBOutlet weak var customSwitch: UISwitch!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
view.addSubview(switchControl)
switchControl.addTarget(self, action: #selector(changeSwitchControl), for: .valueChanged)
let safeArea = view.safeAreaLayoutGuide
switchControl.topAnchor.constraint(equalTo: safeArea.topAnchor).isActive = true
switchControl.leadingAnchor.constraint(equalTo: safeArea.leadingAnchor).isActive = true
setUpUI()
}
#objc
private func changeSwitchControl() {
changeStatus?(switchControl.isOn, identifier)
}
}
Here is code in View Controller .
class ViewController: UIViewController {
// ! Mark is means it not null the value will in story board
// use lazy property to tell compiler instance value of the datasource self class and execuate the controller code to set the value of tableview datasource
private let viewModel = ViewModel()
private var subcriber = Set<AnyCancellable>()
private var storiesTrue = [String]()
#Published private(set) var stories = [Rover]()
private var datasourceStories = [Rover]()
private lazy var tableView: UITableView = {
let tableview = UITableView()
tableview.translatesAutoresizingMaskIntoConstraints = false// adding constrains
tableview.dataSource = self
tableview.showsVerticalScrollIndicator = false
tableview.register(StoryCell.self, forCellReuseIdentifier: StoryCell.identifier)
return tableview
}()
override func viewDidLoad() {
super.viewDidLoad()
setUpUI()
setUpBinding()
tableView.dataSource = self
tableView.delegate = self
self.tableView.rowHeight = 44;
// display the second view controller using push methods
/*let detail = DetailsViewController()
detail.name "Mohammad"
navigationController?.pushViewController(detail, animated: true)*/
}
private func setUpUI() {
view.backgroundColor = .white
view.addSubview(tableView)// adding hierracy key like adding into story board
// creating constrains with safe area
let safeArea = view.safeAreaLayoutGuide
tableView.topAnchor.constraint(equalTo: safeArea.topAnchor).isActive = true
tableView.leadingAnchor.constraint(equalTo: safeArea.leadingAnchor).isActive = true
tableView.trailingAnchor.constraint(equalTo: safeArea.trailingAnchor).isActive = true
tableView.bottomAnchor.constraint(equalTo: safeArea.bottomAnchor).isActive = true
}
private func setUpBinding(){
viewModel
.$rovers
.receive(on : RunLoop.main)
.sink {[weak self]_ in
self?.tableView.reloadData()
}
.store(in: &subcriber)
viewModel.getStories()
}
private func getStatus(by identifier: String) -> Bool {
return storiesTrue.contains(identifier)
}
}
extension ViewController: UITableViewDataSource{
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return viewModel.rovers.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
guard let cell = tableView.dequeueReusableCell(withIdentifier: StoryCell.identifier , for: indexPath) as? StoryCell
else{ return UITableViewCell()}
let row = indexPath.row
let Id = viewModel.getId(by: row)
let title = viewModel.getTitle(by: row)
let identifier = viewModel.getIdentifier(by: indexPath.row)
let status = getStatus(by: identifier) ? "active" : "false"
cell.configureCell(Id: Id,title: title,statusString: status)
return cell
}
}
extension ViewController: UITableViewDataSourcePrefetching {
func tableView(_ tableView: UITableView, prefetchRowsAt indexPaths: [IndexPath]) {
viewModel.getStories()
}
}
extension ViewController : UITableViewDelegate{
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath)
{
let second = DetailsViewController()
navigationController?.pushViewController(second, animated: true)
}
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return 44;
}
}
Here is the view controller to defined the UI properties .
class StoryCell: UITableViewCell {
static let identifier = "StoryCell"
private lazy var storyIdLabel: UILabel = {
let label = UILabel()
label.translatesAutoresizingMaskIntoConstraints = false
label.numberOfLines = 0
label.textAlignment = .left
return label
}()
public lazy var storyTitleLabel: UILabel = {
let label = UILabel()
label.translatesAutoresizingMaskIntoConstraints = false
label.numberOfLines = 0
label.textAlignment = .left
return label
}()
private lazy var statusStory: UILabel = {
let label = UILabel()
label.translatesAutoresizingMaskIntoConstraints = false
label.numberOfLines = 0
label.textAlignment = .left
return label
}()
override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
super.init(style: style, reuseIdentifier: reuseIdentifier)
setUpUI()
}
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
func configureCell(Id: Int,title: String,statusString: String) {
storyIdLabel.text = "Id: \(String(Id))"
storyTitleLabel.text = "Status :\(title)"
statusStory.text = "Status:\(statusString)"
}
/* func configureCell(Id: Int) {
storyIdLabel.text = "Id: \(String(Id))"
}*/
override func awakeFromNib() {
super.awakeFromNib()
// Initialization code
}
private func setUpUI() {
contentView.addSubview(storyTitleLabel)
// constraints
let safeArea = contentView.safeAreaLayoutGuide
storyTitleLabel.topAnchor.constraint(equalTo: safeArea.topAnchor).isActive = true
storyTitleLabel.leadingAnchor.constraint(equalTo: safeArea.leadingAnchor).isActive = true
storyTitleLabel.trailingAnchor.constraint(equalTo: safeArea.trailingAnchor).isActive = true
contentView.addSubview(storyIdLabel)
let safeArea1 = contentView.safeAreaLayoutGuide
storyIdLabel.topAnchor.constraint(equalTo: storyTitleLabel.topAnchor).constant = 5
storyIdLabel.bottomAnchor.constraint(equalTo: safeArea1.bottomAnchor).isActive = true
storyIdLabel.leadingAnchor.constraint(equalTo: safeArea1.leadingAnchor).isActive = true
storyIdLabel.trailingAnchor.constraint(equalTo: safeArea1.trailingAnchor).isActive = true
/* contentView.addSubview(statusStory)
let safeArea2 = contentView.safeAreaLayoutGuide
statusStory.topAnchor.constraint(equalTo: statusStory.topAnchor).isActive = true
statusStory.bottomAnchor.constraint(equalTo: safeArea2.bottomAnchor).isActive = true
statusStory.leadingAnchor.constraint(equalTo: safeArea2.leadingAnchor).isActive = true
statusStory.trailingAnchor.constraint(equalTo: safeArea2.trailingAnchor).isActive = true*/
}
}

Answer 1

You have to use tableView.reloadData() after updating info that you want to show. Without running this function, data in table view won't be updated.