Allows for easy registration and dequeue of table view and collection view cells.

NibLoadable.swift

import UIKit

//  MARK: Nib Loadable
public protocol NibLoadable {
	///	The name of the .xib file in which this view is defined.
	static var nibName: String { get }
}
//  MARK: Nib Loadable Convenience
public extension NibLoadable where Self: UIView {
	static var nibName: String { return NSStringFromClass(self).components(separatedBy: ".").last! }
}

//  MARK: Reusable View
/**
Indicates that a view can be reused provided it matches a provided identifier.
*/
public protocol ReusableView: class {
	///	The identifier for this type of reusable view.
	static var defaultReuseIdentifier: String { get }
}
//  MARK: Reusable View Convenience
public extension ReusableView where Self: UIView {
	static var defaultReuseIdentifier: String { return NSStringFromClass(self).components(separatedBy: ".").last! }
}
extension UICollectionViewCell: ReusableView { }
extension UITableViewCell: ReusableView { }

//  MARK: Registration
public extension UICollectionView {
	func register<T: UICollectionViewCell>(_: T.Type) {
		register(T.self, forCellWithReuseIdentifier: T.defaultReuseIdentifier)
	}
	func register<T: UICollectionViewCell>(_: T.Type) where T: NibLoadable {
		let bundle = Bundle(for: T.self)
		let nib = UINib(nibName: T.nibName, bundle: bundle)
		register(nib, forCellWithReuseIdentifier: T.defaultReuseIdentifier)
	}
}
public extension UITableView {
	func register<T: UITableViewCell>(_: T.Type) {
		register(T.self, forCellReuseIdentifier: T.defaultReuseIdentifier)
	}
	func register<T: UITableViewCell>(_: T.Type) where T: NibLoadable {
		let bundle = Bundle(for: T.self)
		let nib = UINib(nibName: T.nibName, bundle: bundle)
		register(nib, forCellReuseIdentifier: T.defaultReuseIdentifier)
	}
}

//  MARK: Dequeuing
public extension UICollectionView {
	func dequeue<T: UICollectionViewCell>(for indexPath: IndexPath) -> T {
		guard let cell = dequeueReusableCell(withReuseIdentifier: T.defaultReuseIdentifier, for: indexPath) as? T else {
			fatalError("Could not dequeue cell with identifier: \(T.defaultReuseIdentifier)")
		}
		return cell
	}
}
public extension UITableView {
	func dequeue<T: UITableViewCell>(for indexPath: IndexPath) -> T {
		guard let cell = dequeueReusableCell(withIdentifier: T.defaultReuseIdentifier, for: indexPath) as? T else {
			fatalError("Could not dequeue cell with identifier: \(T.defaultReuseIdentifier)")
		}
		return cell
	}
}