Rotation only in one ViewController

Question

I am trying to rotate one view while all other views (5) are fixed to portrait. The reason is that in that one view I want the user to watch pictures which he saved before.

Answer 1

Swift 3: Add code to AppDelegate.swift

func application(_ application: UIApplication, supportedInterfaceOrientationsFor window: UIWindow?) -> UIInterfaceOrientationMask {
        if let rootViewController = self.topViewControllerWithRootViewController(rootViewController: window?.rootViewController) {
            if (rootViewController.responds(to: Selector(("canRotate")))) {
                // Unlock landscape view orientations for this view controller
                return .allButUpsideDown;
            }
        }

        // Only allow portrait (standard behaviour)
        return .portrait;
    }

    private func topViewControllerWithRootViewController(rootViewController: UIViewController!) -> UIViewController? {
        if (rootViewController == nil) { return nil }
        if (rootViewController.isKind(of: (UITabBarController).self)) {
            return topViewControllerWithRootViewController(rootViewController: (rootViewController as! UITabBarController).selectedViewController)
        } else if (rootViewController.isKind(of:(UINavigationController).self)) {
            return topViewControllerWithRootViewController(rootViewController: (rootViewController as! UINavigationController).visibleViewController)
        } else if (rootViewController.presentedViewController != nil) {
            return topViewControllerWithRootViewController(rootViewController: rootViewController.presentedViewController)
        }
        return rootViewController
    }

Then :

import UIKit

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
    }


    override func viewWillDisappear(_ animated : Bool) {
        super.viewWillDisappear(animated)

        if (self.isMovingFromParentViewController) {
            UIDevice.current.setValue(Int(UIInterfaceOrientation.portrait.rawValue), forKey: "orientation")
        }
    }

    func canRotate() -> Void {}

}

http://www.jairobjunior.com/blog/2016/03/05/how-to-rotate-only-one-view-controller-to-landscape-in-ios-slash-swift/