iOS/Pods/OAuthSwift/Sources/UIApplication+OAuthSwift.swift

   1 //
   2 //  UIApplication+OAuthSwift.swift
   3 //  OAuthSwift
   4 //
   5 //  Created by phimage on 11/12/15.
   6 //  Copyright © 2015 Dongri Jin. All rights reserved.
   7 //
   8
   9 #if os(iOS) || os(tvOS)
  10     import UIKit
  11
  12     extension UIApplication {
  13         static var topViewController: UIViewController? {
  14             #if !OAUTH_APP_EXTENSIONS
  15                 return UIApplication.shared.topViewController
  16             #else
  17                 return nil
  18             #endif
  19         }
  20
  21         var topViewController: UIViewController? {
  22             guard let rootController = self.keyWindow?.rootViewController else {
  23                 return nil
  24             }
  25             return UIViewController.topViewController(rootController)
  26         }
  27     }
  28
  29     extension UIViewController {
  30
  31         static func topViewController(_ viewController: UIViewController) -> UIViewController {
  32             guard let presentedViewController = viewController.presentedViewController else {
  33                 return viewController
  34             }
  35             #if !topVCCastDisabled
  36             if let navigationController = presentedViewController as? UINavigationController {
  37                 if let visibleViewController = navigationController.visibleViewController {
  38                     return topViewController(visibleViewController)
  39                 }
  40             } else if let tabBarController = presentedViewController as? UITabBarController {
  41                 if let selectedViewController = tabBarController.selectedViewController {
  42                     return topViewController(selectedViewController)
  43                 }
  44             }
  45             #endif
  46             return topViewController(presentedViewController)
  47         }
  48     }
  49
  50 #endif