Custom UIView for UIViewController in Swift

Question

I am using code to create a view (with subviews) for UIViewController, here is how I do it:

• override loadView()

  class MYViewController: UIViewController {
  
  var myView: MyView! { return self.view as MyView }
  
     override func loadView() {
        view = MyView() 
     }
  }
  

and this is how I create my own view:

class MyView: UIView {

    // MARK: Initialization

    override init (frame : CGRect) {
        super.init(frame : frame)
        addSubviews()
        setupLayout()
    }

    convenience init () {
        self.init(frame:CGRect.zero)
    }

    required init(coder aDecoder: NSCoder) {
        fatalError("This class does not support NSCoding")
    }

    // MARK: Build View hierarchy

    func addSubviews(){
        // add subviews
    }

    func setupLayout(){
        // Autolayout
    }

    // lazy load views
}

I do this for all of my View controllers, and I'm looking for a more elegant way, because this process repeats, so is there any solution for creating such a general one, for example, creating a super-abstract class or creating an extension for UIViewController and UIView, protocols? I'm new to Swift, and I think Swift may have a more elegant solution with its modern templates.

Answer 1

, :

, , , . , , .

class CustomView: UIView {

    // MARK: Initialization

    override init(frame: CGRect) {
        super.init(frame: frame)
        addSubviews()
        setupLayout()
    }

    required init() {
        super.init(frame: .zero)
        addSubviews()
        setupLayout()
    }

    required init(coder aDecoder: NSCoder) {
        fatalError("This class does not support NSCoding")
    }

    // MARK: Build View hierarchy

    func addSubviews(){
        // add subviews
    }

    func setupLayout(){
        // Autolayout
    }

}

, , .

class CustomViewController<T: CustomView>: UIViewController {

    var customView: T! { return view as! T }

    override func loadView() {
        view = T()
    }

    init() {
        super.init(nibName: nil, bundle: nil)
    }

}

, , , :

class AnotherCustomView: CustomView { /* Override methods */ }

...

let controller = CustomViewController<AnotherCustomView>()

Boom!

, , :

class AnotherCustomView: CustomView { /* Override methods */ }

...

typealias AnotherCustomViewController = CustomViewController<AnotherCustomView>
let controller = AnotherCustomViewController()