Clean swift how to pass data back to viewController

Question

class ListBillPaymentFavoriteRouter: NSObject, ListBillPaymentFavoriteRoutingLogic, ListBillPaymentFavoriteDataPassing {
    weak var viewController: ListBillPaymentFavoriteViewController?
    var dataStore: ListBillPaymentFavoriteDataStore?

    // MARK: Routing

    func routeToBillPaymentInput() {
        let destinationVC = BillPaymentInputViewController.instantiate()
        var destinationDS =  destinationVC.router!.dataStore!
        passDataToBillPaymentInput(source: dataStore!, destination: &destinationDS)
        navigationToBillPaymentInput(source: viewController!, destination: destinationVC)
    }

    // MARK: Navigation

    func navigationToBillPaymentInput(source: ListBillPaymentFavoriteViewController, destination: BillPaymentInputViewController) {
        source.navigationController?.pop_FromLeftMoveToRight()
    }

    // MARK: Passing data

    func passDataToBillPaymentInput(source: ListBillPaymentFavoriteDataStore, destination: inout BillPaymentInputDataStore) {
        destination.testTest = "Yessssss"
    }


}

When I pop to navigationController I can't receive data

@PuChaisirikul it's common way for iOS to use delegates. But you can use callbacks instead of them — Taras Chernyshenko, Feb 06 '18 at 09:21
I think clean swift maybe have good way for pass data back to viewController — Pu Chaisirikul, Feb 06 '18 at 09:52
Possible duplicate of [Passing Data between View Controllers](https://stackoverflow.com/questions/5210535/passing-data-between-view-controllers) — Tamás Sengel, Feb 06 '18 at 12:32
I knew we should could viewController, example let index = viewController!.navigationController!.viewControllers.count - 2 let destinationVC = viewController?.navigationController?.viewControllers[index] as! BillPaymentInputViewController — Pu Chaisirikul, Feb 07 '18 at 04:45

score 0 · Answer 1 · answered Feb 07 '18 at 04:47

We should could viewController, example

func routeToBillPaymentInput() {
    let index = viewController!.navigationController!.viewControllers.count - 2
    let destinationVC = viewController?.navigationController?.viewControllers[index] as! BillPaymentInputViewController
    var destinationDS =  destinationVC.router!.dataStore!
    passDataToBillPaymentInput(source: dataStore!, destination: &destinationDS)
    navigationToBillPaymentInput(source: viewController!, destination: destinationVC)
}

score 0 · Answer 2 · answered Feb 07 '18 at 04:50

At all

class ListBillPaymentFavoriteRouter: NSObject, ListBillPaymentFavoriteRoutingLogic, ListBillPaymentFavoriteDataPassing {
weak var viewController: ListBillPaymentFavoriteViewController?
var dataStore: ListBillPaymentFavoriteDataStore?

// MARK: Routing

func routeToBillPaymentInput() {
    let index = viewController!.navigationController!.viewControllers.count - 2
    let destinationVC = viewController?.navigationController?.viewControllers[index] as! BillPaymentInputViewController
    var destinationDS =  destinationVC.router!.dataStore!
    passDataToBillPaymentInput(source: dataStore!, destination: &destinationDS)
    navigationToBillPaymentInput(source: viewController!, destination: destinationVC)
}

// MARK: Navigation

func navigationToBillPaymentInput(source: ListBillPaymentFavoriteViewController, destination: BillPaymentInputViewController) {
    source.navigationController?.popViewController(animated: true)
}

// MARK: Passing data

func passDataToBillPaymentInput(source: ListBillPaymentFavoriteDataStore, destination: inout BillPaymentInputDataStore) {
    destination.testTest = "Yessssss"

}

}

Clean swift how to pass data back to viewController

2 Answers2