我正在实现协调器模式以处理我的应用程序中的导航。从理论上讲,当用户选择其他类别时,我想设置splitViewController,用一个新类别替换该类别的现有NavigationController。
[当应用程序启动时,协调器按预期方式运行,当我弹出或推入在启动时实现的相同navigationController
时也可以正常工作,我唯一的问题是当我尝试替换navigationController
的整个splitviewcontroller
时。
问题:添加新的NavigationController不会显示给用户
这是我的实现。
class Coordinator: Navigable, DataCommunicator{
//MARK: - Navigable Conformable
typealias UIController = SplitController
var viewController: UIController
var childCoordinators: [Coordinatable] = []
//MARK: - Root Custom setup
weak var parentCoordinator: RootCoordinator?
//MARK: - Init
init(viewController: UIController) {
self.viewController = viewController
}
func start() {
let categoryNavigationController = CategoryNavigationController()
let categoryNavigationCoordinator = CategoryNavigationCoordinator(viewController: noteNavigationController)
categoryNavigationCoordinator.start()
childCoordinators.append(categoryNavigationCoordinator)
categoryNavigationController.coordinator = self
viewController.viewControllers = [categoryNavigationController]
}
func startSearchCategory() {
childCoordinators.removeLast()
viewController.navigationController?.popToRootViewController(animated: false)
viewController.viewControllers.removeLast()
let searchNavigationController = SearchNavigationController()
let searchCoordinator = SearchNavigationCoordinator(viewController:searchNavigationController)
searchCoordinator.start()
childCoordinators.append(searchCoordinator)
searchNavigationController.coordinator = self
searchCoordinator.parentCoordinator = self
viewController.viewControllers = [searchNavigationController]
}
}
更新:我想我以不同的方式达到了预期的行为,但我仍然好奇为什么不能在navigationController
中显示masterController的不同UISplitViewController
并显示它。
但是我的方法帮助我的代码更加模块化。我在Coordinator
协议中添加了以下功能
func stopChild<T: Coordinatable>(coordinator: T, callback: CoordinatorCallBack?)
并实现了以下功能:
override func stopChild<T>(coordinator: T, callback: CoordinatorCallBack?) where T : Coordinatable {
childCoordinators = childCoordinators.filter({$0 !== coordinator})
// Calling parent to stop the child coordinator to roll back to the rootController
parentCoordinator?.stopChild(coordinator: self, callback: nil)
}
回滚帮助我实例化了我想要的完整堆栈,而没有尝试为splitViewController
添加自定义修改代码,相反,我将整个splitViewController
替换为与我正在使用的模块相对应的模块,这更漂亮用于一般用途。因为在我的回叫中,我可以将所需的模块发送给根协调员,用户接下来会对它感兴趣。