A UITableView extension that allows you to dequeue reusable cells in a type safe manner.

UITableView+TypeSafeDequeuing.swift

import UIKit

extension UITableView {

    // Ensures that a dequeued cell is of the expected type and fails with a meaningful message, if it is not.
    func dequeueReusableCell<Cell>(ofType type: Cell.Type, withIdentifier identifier: String, for indexPath: IndexPath) -> Cell {
        let cell = dequeueReusableCell(withIdentifier: identifier, for: indexPath)

        guard let cellOfCorrectType = cell as? Cell else {
            preconditionFailure("Dequeued cell (\(cell)) was not of expected type (\(type))")
        }

        return cellOfCorrectType
    }
}