stremsdoerfer

class ChatViewController: UIViewController {
  
  override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)
    self.textField.text = UserDefaults.chatDraft(chatId).value
  }
  
  override func viewWillDisappear(_ animated: Bool) {
    super.viewWillDisappear(animated)
    UserDefaults.chatDraft(chatId).value = self.textField.text //Type safe, you can't set anything but a String

stremsdoerfer

extension UserDefaults {
  static var token = StandardPair<String>(key: "token")
  static var pinnedConversationIds = StandardPair<[Int]>(key: "pinnedConversationIds")
  static var chatDraft = {(chatId: Int) in StandardPair<String>(key: "chatDraft\(chatId)")}
}

stremsdoerfer

struct StandardPair<T> {
    let key: String
    
    var value: T? {
        set {
            if let safeValue = newValue {
                UserDefaults.standard.set(safeValue, forKey: key)
            } else {
                UserDefaults.standard.removeObject(forKey: key)
            }

stremsdoerfer

class ViewController: UIViewController {
  
  @IBOutlet weak var searchBar: UISearchBar!
  @IBOutlet weak var label: UILabel!
  
  override func viewDidLoad() {
    searchBar.rx.text.throttle(0.2, scheduler: MainScheduler.instance).subscribe(onNext: {(searchText) in
      self.label.text = "new value: \(searchText)"
    }).addDisposableTo(bag)
  }

stremsdoerfer

Alamofire.request("https://yourapi.com/login", method: .post, parameters: ["email":"test@gmail.com","password":"1234"]).responseJSON { (response:DataResponse<Any>) in
    if response.response?.statusCode == 200 {
        self.navigationController?.pushViewController(NewViewController(), animated: true)
    }else{
        //Show alert
    }
}

stremsdoerfer

override func viewDidLoad() {
  super.viewDidLoad()
  DispatchQueue.main.asyncAfter(deadline: .now() + 2) {
    self.navigationController?.pushViewController(NewViewController())
  }
}

stremsdoerfer

class CustomView:UIView{ 
    var onTap:(()->Void)?
    ...
}

class ViewController:UIViewController{ 
    let customView = CustomView() 
    var buttonClicked = false
    
    func setupCustomView(){

stremsdoerfer

cell.onButtonTap = { [unowned self] in
    self.navigationController?.pushViewController(NewViewController(), animated: true)
}

stremsdoerfer

class TableViewController: UITableViewController {

  override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
      let cell = tableView.dequeueReusableCell(withIdentifier: "CustomCell", for: indexPath) as! CustomCell
      cell.onButtonTap = {
          self.navigationController?.pushViewController(NewViewController(), animated: true)
      }
  }
}

stremsdoerfer

class ViewController: UITableViewController {

  override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
      let cell = tableView.dequeueReusableCell(withIdentifier: "CustomCell", for: indexPath) as! CustomCell
      cell.onButtonTap = {
          self.navigationController?.pushViewController(NewViewController(), animated: true)
      }
  }
}