Kasayon

Kasayon, which apparently means convenience in Cuban - is a small collection of protocols and and extensions that aims to make working with table- and collectionviews slightly more enjoyable.

ReusableView

Both UITableViewCell and UICollectionViewCell conform to ReusableView out of the box and hence expose a static property named reuseIdentifier.

/// ReusableView can be used with any view that is reusable
public protocol ReusableView: class {
    static var reuseIdentifier: String { get }
}

public extension ReusableView where Self: UIView {
    static var reuseIdentifier: String {
        return String(describing: self)
    }
}

NibLoadable

The NibLoadable protocol is very similar to the ReusableView protocol, but it exposes a static property named nibName.

/// NibLoadable is used with classes that can be loaded via a nib with the same name
public protocol NibLoadable: class {
    static var nibName: String { get }
}

public extension NibLoadable where Self: UIView {
    static var nibName: String {
        return String(describing: self)
    }
}

You should make your cell class conform to NibLoadable if it comes with an accompanying nib file.

Cell setup 🔧

// Any UITableViewCell automatically conforms to ReusableView
class SomeTableViewCell: UItableViewCell {}

// If a cell is loaded via a nib, it should conform to NibLoadable as well
class SomeOtherTableViewCell: UItableViewCell, NibLoadable {}

Which reduces this 😐

class ViewController: UIViewController {

    func viewDidLoad() {
        super.viewDidLoad()

        tableView.register(SomeTableViewCell.self, forCellReuseIdentifier: "SomeTableViewCell")
        tableView.register(UINib(nibName: "SomeOtherTableViewCell", bundle: nil), forCellReuseIdentifier: "SomeOtherTableViewCell")
    }

    // MARK: - UITableViewDataSource

    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = dequeueReusableCell(withIdentifier: "SomeTableViewCell", for: indexPath) as! SomeTableViewCell
        cell.configure(thing: thing)

        return cell
    }

}

To just this 🙌

class ViewController: UIViewController {

    func viewDidLoad() {
        super.viewDidLoad()

        tableView.register(class: SomeTableViewCell.self)
        tableView.register(class: SomeOtherTableViewCell.self)
    }

    // MARK: - UITableViewDataSource

    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueCell(forIndexPath: indexPath) as SomeTableViewCell
        cell.configure(thing: thing)

        return cell
    }

}

Caveats

Class name, reuse identifier and nib name must match