Protocol extension to help using UITableView protocols in a better way.

ReusableViewEnum.swift

protocol ReusableViewEnum {}

extension ReusableViewEnum where Self: RawRepresentable, Self.RawValue == Int {
    static var all: [Self] {
        var index = 0
        var allItems = [Self]()
        while let item = Self(rawValue: index) {
            allItems.append(item)
            index += 1
        }
        return allItems
    }
    
    static func build(with value: Int) -> Self {
        guard let row = Self(rawValue: value) else {
            fatalError("Unimplemented value: \(value)")
        }
        return row
    }
}

// ---------------------
// EXAMPLE USAGE CODE:

// You only have to define the enum
fileprivate enum ProfileSections: Int, ReusableViewEnum {
    case picture = 0
    case name
    case email
    case password
}

// And use it in your code:
func numberOfSections(in tableView: UITableView) -> Int {
    return ProfileSections.all.count
}

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    switch ProfileSection.build(with: section) {
        case .picture   : return 1
        case .name      : return 1  
        case .email     : return 1 
        case .password  : return 1 
    }
}

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    switch ProfileSection.build(with: indexPath.section) {
        case .picture   : // Dequeue profile picture section
        case .name      : // Dequeue name section
        case .email     : // Dequeue email section
        case .password  : // Dequeue password section
    }
}

// Please note we are not using default clause, because it's an exhaustive switch.