これこれ #CodePiece

CodePiece.swift

class HomeViewModel {
    let charges = Variable<[Charge]>([])
    let didAppear = PublishSubject<Void>()
    
    let disposeBag = DisposeBag()
    
    init(with state: AppState) {
        guard let api = state.webAPI else { fatalError("error") }
        
        let _ = didAppear.flatMapLatest { api.getCharges() }
            .bindTo(charges)
    }
}

class HomeViewController: UIViewController {
    @IBOutlet weak var chargesView: UITableView!

    let viewModel = HomeViewModel(with: AppState.shared)
    let disposeBag = DisposeBag()

    override func viewDidLoad() {
        super.viewDidLoad()
        
        let nib = UINib(nibName: "ChargeCell", bundle: nil)
        chargesView.register(nib, forCellReuseIdentifier: "ChargeCell")
        
        viewModel.charges.asObservable()
            .bindTo(chargesView.rx.items(cellIdentifier: "ChargeCell", cellType: ChargeCell.self)) { row, charge, cell in
                cell.configure(with: charge)
            }
            .addDisposableTo(disposeBag)
    }
    
    override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(animated)
        
        viewModel.didAppear.onNext()
    }
}