协调器模式未推送到NextViewController

Question

这是AppDelegate.swift的实现/配置：

class AppDelegate: UIResponder, UIApplicationDelegate {

var window: UIWindow?
var coordinator: MainCoordinator?

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
    // Override point for customization after application launch.
    //        Fabric.with([Crashlytics.self])
    //        FirebaseApp.configure()
    let navigationController = UINavigationController()
    coordinator = MainCoordinator(navigationController: navigationController)
    coordinator?.start()
    self.window = UIWindow(frame: UIScreen.main.bounds)
    self.window?.rootViewController = navigationController
    self.window?.makeKeyAndVisible()

这里是MainCoordinator.swift

import Foundation

导入UIKit

Class MainCoordinator：协调人{ var subCoordinators =协调器 var navigationController：UINavigationController

init(navigationController: UINavigationController) {
    self.navigationController = navigationController
}
func start() {
    let VC = SplashViewController.instantiate()
    VC.coordinator = self
    navigationController.pushViewController(VC, animated: false)
    NSLog("view Started")


}

func goToMerchandizeEntranceView() {

    let vc = MerchandizeEntranceViewController.instantiate()
    vc.coordinator = self
    navigationController.pushViewController(vc, animated: true)
}

func gotoMerchandizeRequestView() {

    let vc = MerchandizeRequestStatusViewController.instantiate()
    vc.coordinator = self
    navigationController.pushViewController(vc, animated: true)
}

}

这里MainVC中，在View集合索引的didselectItemAt IndexPath方法中应该触发到下一个VC，但是，不会触发VC并显示在secure上，但是“ NsLog”会打印该消息。任何人都可以帮助我解释我的错误之处。 。？

func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {

    if collectionView == menuCollectionView {
        switch indexPath.row {
        case 0:
            coordinator?.goToMerchandizeEntranceView()
            NSLog("Receiving touch")
        case 1:
            coordinator?.gotoMerchandizeRequestView()
             NSLog("Receiving touch")
        default:
            break
        }
    }
    else {

        NSLog("define action for story cell")
    }

}

Answer 1

更新：由于您正在使用情节提要，因此您应该从情节提要中实例化视图控制器，如下所示：

func goToMerchandizeEntranceView() {
    let storyboard = UIStoryboard(name: "Main", bundle: nil)
    if let vc = storyboard.instantiateViewController(withIdentifier: "MerchandizeEntranceViewController") as? MerchandizeEntranceViewController {
        vc.coordinator = self
        navigationController.pushViewController(vc, animated: true)
    } else {
        print("Could not instantiateViewController: MerchandizeEntranceViewController")
    }
}

func gotoMerchandizeRequestView() {
    let storyboard = UIStoryboard(name: "Main", bundle: nil)
    if let vc = storyboard.instantiateViewController(withIdentifier: "MerchandizeRequestStatusViewController") as? MerchandizeRequestStatusViewController {
        vc.coordinator = self
        navigationController.pushViewController(vc, animated: true)
    } else {
        print("Could not instantiateViewController: MerchandizeEntranceViewController")
    }
}

似乎您的协调器未在MainVC中初始化。您应该在viewDidLoad中初始化协调器：

override func viewDidLoad() {
    super.viewDidLoad()
    if let navigationController = navigationController {
        coordinator = MainCoordinator(navigationController: navigationController)
    }
}