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TelegramUI/AuthorizationSequenceSplashController.swift

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+import Foundation
+import Display
+import AsyncDisplayKit
+
+import TelegramUIPrivateModule
+
+final class AuthorizationSequenceSplashController: ViewController {
+    private var controllerNode: AuthorizationSequenceSplashControllerNode {
+        return self.displayNode as! AuthorizationSequenceSplashControllerNode
+    }
+    
+    private let controller = RMIntroViewController()
+    
+    var nextPressed: (() -> Void)?
+    
+    override init(navigationBar: NavigationBar = NavigationBar()) {
+        super.init(navigationBar: navigationBar)
+        
+        self.navigationBar.isHidden = true
+        self.controller.startMessaging = { [weak self] in
+            self?.nextPressed?()
+        }
+    }
+    
+    required init(coder aDecoder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+    
+    override public func loadDisplayNode() {
+        self.displayNode = AuthorizationSequenceSplashControllerNode()
+        self.displayNodeDidLoad()
+    }
+    
+    private func addControllerIfNeeded() {
+        if !controller.isViewLoaded {
+            self.displayNode.view.addSubview(controller.view)
+            controller.view.frame = self.displayNode.bounds;
+            controller.viewDidAppear(false)
+        }
+    }
+    
+    override func viewWillAppear(_ animated: Bool) {
+        super.viewWillAppear(animated);
+        controller.viewWillAppear(false)
+        self.addControllerIfNeeded()
+    }
+    
+    override func viewDidAppear(_ animated: Bool) {
+        super.viewDidAppear(animated)
+        
+        controller.viewDidAppear(animated)
+    }
+    
+    override func viewWillDisappear(_ animated: Bool) {
+        super.viewWillDisappear(animated)
+        
+        controller.viewWillDisappear(animated)
+    }
+    
+    override func viewDidDisappear(_ animated: Bool) {
+        super.viewDidDisappear(animated)
+        
+        controller.viewDidDisappear(animated)
+    }
+    
+    override func containerLayoutUpdated(_ layout: ContainerViewLayout, transition: ContainedViewLayoutTransition) {
+        super.containerLayoutUpdated(layout, transition: transition)
+        
+        self.controllerNode.containerLayoutUpdated(layout, navigationBarHeight: 0.0, transition: transition)
+        
+        self.addControllerIfNeeded()
+        if case .immediate = transition {
+            self.controller.view.frame = CGRect(origin: CGPoint(), size: layout.size)
+        } else {
+            UIView.animate(withDuration: 0.3, animations: {
+                self.controller.view.frame = CGRect(origin: CGPoint(), size: layout.size)
+            })
+        }
+    }
+}