taler-ios

View+dismissTop.swift (3464B)

---

 //  MIT License
 //  Copyright © Nicolai Harbo
 //
 //  Permission is hereby granted, free of charge, to any person obtaining a copy of this software
 //  and associated documentation files (the "Software"), to deal in the Software without restriction,
 //  including without limitation the rights to use, copy, modify, merge, publish, distribute,
 //  sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
 //  furnished to do so, subject to the following conditions:
 //
 //  The above copyright notice and this permission notice shall be included in all copies or
 //  substantial portions of the Software.
 //
 //  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
 //  BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 //  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
 //  DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 //  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 //
 import SwiftUI
 
 /// This is just a workaround for a SwiftUI bug
 /// A presented sheet (SwiftUI view) doesn't always close when calling "dismiss()" provided by @Environment(\.dismiss),
 /// so we are walking the view stack to find the top presentedViewController (UIKit) and dismiss it.
 extension View {
     @MainActor func dismissTop(_ stack: CallStack, animated: Bool = true) -> Bool {
         let windows = UIApplication.shared.connectedScenes.compactMap {
             ($0 as? UIWindowScene)?.keyWindow       // TODO: iPad might have more than 1 window
         }
         if var topController = windows.first?.rootViewController {
             var gotPresented = false
             var currentController = topController
             while let presentedViewController = currentController.presentedViewController {
                 currentController = presentedViewController
                 gotPresented = true
             }
             if gotPresented {
                 currentController.dismiss(animated: animated)
                 return true
             } else if let navController = Self.findNavigationController(viewController: topController) {
                 navController.popToRootViewController(animated: animated)
                 return true
             } else {
                 print("Yikes❗️ There is no navigationController!")
             }
         } else {
             print("Yikes❗️ There is no window/rootViewController!")
         }
         return false
     }
     @MainActor static func findNavigationController(viewController: UIViewController?) -> UINavigationController? {
         guard let viewController = viewController else {
             return nil
         }
 
         if let tabBarController = viewController as? UITabBarController {
             return findNavigationController(viewController: tabBarController.selectedViewController)
         }
 
         if let navigationController = viewController as? UINavigationController {
             return navigationController
         }
 
         for childViewController in viewController.children {
             return findNavigationController(viewController: childViewController)
         }
 
         return nil
     }
 }
 // MARK: -
 extension View {
     @MainActor
     static func endEditing() {
         UIApplication.shared.windows.forEach { $0.endEditing(true) }
     }
 }