52 lines
1.8 KiB
Swift
Executable File
52 lines
1.8 KiB
Swift
Executable File
/*
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Copyright 2019 New Vector Ltd
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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import UIKit
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/// Protocol describing a [Coordinator](http://khanlou.com/2015/10/coordinators-redux/).
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/// Coordinators are the objects which control the navigation flow of the application.
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/// It helps to isolate and reuse view controllers and pass dependencies down the navigation hierarchy.
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protocol Coordinator: AnyObject {
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/// Starts job of the coordinator.
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func start()
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/// Child coordinators to retain. Prevent them from getting deallocated.
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var childCoordinators: [Coordinator] { get set }
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/// Stores coordinator to the `childCoordinators` array.
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///
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/// - Parameter childCoordinator: Child coordinator to store.
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func add(childCoordinator: Coordinator)
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/// Remove coordinator from the `childCoordinators` array.
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///
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/// - Parameter childCoordinator: Child coordinator to remove.
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func remove(childCoordinator: Coordinator)
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}
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// `Coordinator` default implementation
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extension Coordinator {
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func add(childCoordinator coordinator: Coordinator) {
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childCoordinators.append(coordinator)
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}
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func remove(childCoordinator: Coordinator) {
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self.childCoordinators = self.childCoordinators.filter { $0 !== childCoordinator }
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}
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}
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