Force landscape mode in one ViewController using Swift

Question

I am trying to force only one view in my application on landscape mode, I am calling:

override func shouldAutorotate() -> Bool {
    print("shouldAutorotate")
    return false
}

override func supportedInterfaceOrientations() -> Int {
    print("supportedInterfaceOrientations")
    return Int(UIInterfaceOrientationMask.LandscapeLeft.rawValue)
}

override func preferredInterfaceOrientationForPresentation() -> UIInterfaceOrientation {
    return UIInterfaceOrientation.LandscapeLeft
}

The view is launched in the portrait mode, and keep rotating when I change the device orientation. The shouldAutorotate() method is never called.

Any help would be appreciated.

Answer 1

It may be useful for others, I found a way to force the view to launch in landscape mode:

Put this in the viewDidLoad():

let value = UIInterfaceOrientation.landscapeLeft.rawValue
UIDevice.current.setValue(value, forKey: "orientation")

and,

override var shouldAutorotate: Bool {
    return true
}

Answer 2

According to the documentation of supportedInterfaceOrientations the shouldAutorotate method should return true or YES in Objective-C so that the supportedInterfaceOrientations are considered.

Answer 3

My solution is

just added below codes in AppDelegate

enum PossibleOrientations {
  case portrait
    case landscape

    func o() -> UIInterfaceOrientationMask {
      switch self {
      case .portrait:
        return .portrait
      case .landscape:
        return .landscapeRight
      }
    }
}
var orientation: UIInterfaceOrientationMask = .portrait

func switchOrientation(to: PossibleOrientations) {
    let keyOrientation = "orientation"

    if to == .portrait && UIDevice.current.orientation.isPortrait {
        return
    } else if to == .landscape && UIDevice.current.orientation.isLandscape {
        return
    }

    switch to {
    case .portrait:
        orientation = .portrait
        UIDevice.current.setValue(UIInterfaceOrientation.portrait.rawValue, forKey: keyOrientation)
    case .landscape:
        orientation = .landscapeRight
        UIDevice.current.setValue(UIInterfaceOrientation.landscapeRight.rawValue, forKey: keyOrientation)
    }
}

And call below codes to change

override func viewDidLoad() {
    super.viewDidLoad()

    if let appDelegate = UIApplication.shared.delegate as? AppDelegate {
        appDelegate.switchOrientation(to: .landscape)
    }
}

or like below

@IBAction func actBack() {
    if let appDelegate = UIApplication.shared.delegate as? AppDelegate {
        appDelegate.switchOrientation(to: .portrait)
    }
    self.navigationController?.popViewController(animated: true)
}

Answer 4

class CustomUIViewController : UIViewController{

    override var   supportedInterfaceOrientations : UIInterfaceOrientationMask{

        return  .landscapeLeft

    }

}


class ViewController: CustomUIViewController {
.
.
.
}

Answer 5

Overwrite (in ViewController):

override public var shouldAutorotate: Bool {
    return false
} 

override public var supportedInterfaceOrientations: UIInterfaceOrientationMask {
    return .landscapeRight
}

override public var preferredInterfaceOrientationForPresentation: UIInterfaceOrientation {
    return .landscapeRight
}

Hint for ios 13. As of ios 13, VC has different modalPresentationStyle as .automatic and device present modal view instead of Full-Screen VC. To fix this one must set modalPresentationStyle to .fullScreen. Example:

let viewController = YourViewController()
viewController.modalPresentationStyle = .fullScreen

Answer 6

In Xcode 11 with Swift 5 I Implemented the following. But it only works when the device orientation for the project target does not include all orientations. I disabled the check for Upside Down. After this, the following code works. If all checkboxes are enabled, the code is not called;

class MyController : UINavigationController {

    override var shouldAutorotate: Bool {
        return true
    }

    override var supportedInterfaceOrientations: UIInterfaceOrientationMask {
        return .landscape
    }


}

Answer 7

I faced a similar issue in my project. It only has support for portrait. The ViewController structure is that, Navigation contained a controller (I called A), and a long Scrollview in A controller. I need A(portrait) present to B(landscape right).

In the beginning I tried the method below and it seemed to work but eventually I found a bug in it.

Swift 5 & iOS12

// In B controller just override three properties

override var shouldAutorotate: Bool {
    return false
}

override var supportedInterfaceOrientations: UIInterfaceOrientationMask {
    return UIInterfaceOrientationMask.landscapeRight
}

override var preferredInterfaceOrientationForPresentation: UIInterfaceOrientation {
    return .landscapeRight
}

And then something become strange. When controller B dismiss to controller A. The ScrollView in controller A has been slid some point.

So I used another method, so I rotate the screen when viewWillAppear. You can see the code for that below.

// In controller B
// not need override shouldAutorotate , supportedInterfaceOrientations , preferredInterfaceOrientationForPresentation

override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)
    let appDel = UIApplication.shared.delegate as! AppDelegate
    appDel.currentOrientation = .landscapeRight
    UIDevice.current.setValue( UIInterfaceOrientation.landscapeRight.rawValue, forKey: "orientation")
    UIViewController.attemptRotationToDeviceOrientation()
}

//in viewWillDisappear rotate to portrait can not fix the bug


override func dismiss(animated flag: Bool, completion: (() -> Void)? = nil) {
    let appDel = UIApplication.shared.delegate as! AppDelegate
    appDel.currentOrientation = .portrait
    UIDevice.current.setValue( UIInterfaceOrientation.portrait.rawValue, forKey: "orientation")
    UIViewController.attemptRotationToDeviceOrientation() //must call 
    super.dismiss(animated: true, completion: nil)
}

// in AppDelegate
// the info plist is only supported portrait also, No need to change it

var currentOrientation : UIInterfaceOrientationMask = .portrait


func application(_ application: UIApplication, supportedInterfaceOrientationsFor window: UIWindow?) -> UIInterfaceOrientationMask {
    return self.currentOrientation
}

Answer 8

Swift 4

Trying to keep the orientation nothing worked but this for me:

...        
override func viewDidLoad() {
       super.viewDidLoad()
       forcelandscapeRight()
       let notificationCenter = NotificationCenter.default
       notificationCenter.addObserver(self, selector: #selector(forcelandscapeRight), name: Notification.Name.UIDeviceOrientationDidChange, object: nil)
    }

    @objc func forcelandscapeRight() {
        let value = UIInterfaceOrientation.landscapeRight.rawValue
        UIDevice.current.setValue(value, forKey: "orientation")
    }
....

Answer 9

Works in Swift 2.2

 func application(application: UIApplication, supportedInterfaceOrientationsForWindow window: UIWindow?) -> UIInterfaceOrientationMask {
    if self.window?.rootViewController?.presentedViewController is SignatureViewController {

        let secondController = self.window!.rootViewController!.presentedViewController as! SignatureViewController

        if secondController.isPresented {

            return UIInterfaceOrientationMask.LandscapeLeft;

        } else {

            return UIInterfaceOrientationMask.Portrait;
        }

    } else {

        return UIInterfaceOrientationMask.Portrait;
    }
}

Answer 10

Using Swift 2.2

Try:

let value = UIInterfaceOrientation.LandscapeLeft.rawValue
UIDevice.currentDevice().setValue(value, forKey: "orientation")

Followed By:

UIViewController.attemptRotationToDeviceOrientation()

From Apple's UIViewController Class Reference:

Some view controllers may want to use app-specific conditions to determine what interface orientations are supported. If your view controller does this, when those conditions change, your app should call this class method. The system immediately attempts to rotate to the new orientation.

Then, as others have suggested, override the following methods as appropriate:

override func supportedInterfaceOrientations() -> UIInterfaceOrientationMask {
    return UIInterfaceOrientationMask.LandscapeLeft
}

override func shouldAutorotate() -> Bool {
    return true
}

I was having a similar issue with a signature view and this solved it for me.

Answer 11

In ViewController in viewDidLoad Method call below function

func rotateDevice(){
    UIDevice.current.setValue(UIInterfaceOrientation.landscapeLeft.rawValue, forKey: "orientation")
    UIView.setAnimationsEnabled(true) // while rotating device it will perform the rotation animation
}`

App Delegate File Add Below Function & Variables

//Orientation Variables
var orientationLock = UIInterfaceOrientationMask.portrait
var myOrientation: UIInterfaceOrientationMask = .portrait

func application(_ application: UIApplication, supportedInterfaceOrientationsFor window: UIWindow?) -> UIInterfaceOrientationMask { return .landscape }

Answer 12

In AppDelegate add this:

//Orientation Variables
var myOrientation: UIInterfaceOrientationMask = .portrait

func application(_ application: UIApplication, supportedInterfaceOrientationsFor window: UIWindow?) -> UIInterfaceOrientationMask {
    return myOrientation  
}

Add this in viewController, that want to change orientation:

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

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

    func rotateToLandsScapeDevice(){
        let appDelegate = UIApplication.shared.delegate as! AppDelegate
        appDelegate.myOrientation = .landscapeLeft
        UIDevice.current.setValue(UIInterfaceOrientation.landscapeLeft.rawValue, forKey: "orientation")
        UIView.setAnimationsEnabled(true)
    }

    func rotateToPotraitScapeDevice(){
        let appDelegate = UIApplication.shared.delegate as! AppDelegate
        appDelegate.myOrientation = .portrait
        UIDevice.current.setValue(UIInterfaceOrientation.portrait.rawValue, forKey: "orientation")
        UIView.setAnimationsEnabled(true)
    }

Answer 13

Tested on IOS 13 to 16.4

First, create a protocol for your rotatable view controller:

protocol Rotatable:UIViewController{}

Then inside your add below code in your AppDelegate:

 func application(_ application: UIApplication, supportedInterfaceOrientationsFor window: UIWindow?) -> UIInterfaceOrientationMask {
    guard let topVC = UIApplication.getTopViewController(base: window?.rootViewController) as? Rotatable else {
        return .portrait
    }
    guard !topVC.isModal else {
        //Use isBeingDismissed to prevent rotation glitches when changing the top view controller.
        return topVC.isBeingDismissed ? .portrait : topVC.supportedInterfaceOrientations
    }

    return topVC.supportedInterfaceOrientations
}

You also need the below extensions:

extension UIApplication {

    static func getTopViewController(base: UIViewController? = rootViewController) -> UIViewController? {
        
        if let nav = base as? UINavigationController {
            return getTopViewController(base: nav.visibleViewController)
        }

        if let tab = base as? UITabBarController {
            if let selected = tab.selectedViewController {
                return getTopViewController(base: selected)
            }
        }

        if let presented = base?.presentedViewController {
            return getTopViewController(base: presented)
        }

        return base
    }
    
    static var rootViewController:UIViewController?{
      return UIApplication
            .shared
            .connectedScenes
            .flatMap { ($0 as? UIWindowScene)?.windows ?? [] }
            .last { $0.isKeyWindow }?.rootViewController
    }

}


extension UIViewController{
    
    var isModal: Bool {

        let presentingIsModal = presentingViewController != nil
        let presentingIsNavigation = navigationController?.presentingViewController?.presentedViewController == navigationController
        let presentingIsTabBar = tabBarController?.presentingViewController is UITabBarController

        return presentingIsModal || presentingIsNavigation || presentingIsTabBar
    }
    
}

After that you just need to override the below variables in your view controllers:

class MyViewController: UIViewController,Rotatable {

     override var shouldAutorotate: Bool {
            return true
        }
        
     override public var supportedInterfaceOrientations: UIInterfaceOrientationMask {
            return .landscape
        }

}

Answer 14

I tried many of the answers below but I'm afraid they didn't work. Especially if nav bars and tab bars are also implemented on the app. The solution that worked for me was provided by Sunny Lee on this post here: Sunny Lee, Medium post

Which in turn is an update of this post: Original solution

The only change I made when implementing the post's solution, was to change the part which references .allButUpsideDown to .landscapeleft

Answer 15

Swift 4 , Tested in iOS 11

You can specify the orientation in projectTarget -> General -> DeploymentInfo(Device Orientation) -> Portrait (Landscapeleft and Landscaperight are optional)

AppDelegate

    var myOrientation: UIInterfaceOrientationMask = .portrait
    func application(_ application: UIApplication, supportedInterfaceOrientationsFor window: UIWindow?) -> UIInterfaceOrientationMask {
        return myOrientation
    }

LandScpaeViewController

override func viewDidLoad() {
        super.viewDidLoad()
        let appDelegate = UIApplication.shared.delegate as! AppDelegate
        appDelegate.myOrientation = .landscape
}

OnDismissButtonTap

let appDelegate = UIApplication.shared.delegate as! AppDelegate
 appDelegate.myOrientation = .portrait

Thats it. :)

Answer 16

iOS 16+: requestGeometryUpdate(_:errorHandler:) API

As noted by @simonbs on Twitter, iOS 16 introduces a new API to update the current interface orientation. While in most cases, other, conventional methods will do the job, in some edge cases, they don't work (forcing the use of private APIs like suggested in this answer). Here, the new public API comes to the rescue.

The API works as follows:

windowScene.requestGeometryUpdate(.iOS(interfaceOrientations: .portrait))

You can optionally also pass a closure to handle errors (though I have no experience under which circumstances errors may occur):

windowScene.requestGeometryUpdate(.iOS(interfaceOrientations: .portrait)) { error in
   // Handle error...
}

Answer 17

// below code put in view controller
// you can change landscapeLeft or portrait

override func viewWillAppear(_ animated: Bool) {
        UIDevice.current.setValue(UIInterfaceOrientation.landscapeRight.rawValue, forKey: "orientation")
    }

override var shouldAutorotate: Bool {
        return true
    }
    override var supportedInterfaceOrientations: UIInterfaceOrientationMask {
        return .landscapeRight
    }
    override var preferredInterfaceOrientationForPresentation: UIInterfaceOrientation {
        return .landscapeRight
    }

Answer 18

Swift 4

override func viewDidLoad() {
    super.viewDidLoad()
    let value = UIInterfaceOrientation.landscapeLeft.rawValue
    UIDevice.current.setValue(value, forKey: "orientation")
}

override var supportedInterfaceOrientations: UIInterfaceOrientationMask {
    return .landscapeLeft
}

override var shouldAutorotate: Bool {
    return true
}

If your view is embedded in a navigation controller, the above alone won't work. You have to cascade up by the following extension after the class definition.

extension UINavigationController {

override open var shouldAutorotate: Bool {
    get {
        if let visibleVC = visibleViewController {
            return visibleVC.shouldAutorotate
        }
        return super.shouldAutorotate
    }
}

override open var preferredInterfaceOrientationForPresentation: UIInterfaceOrientation{
    get {
        if let visibleVC = visibleViewController {
            return visibleVC.preferredInterfaceOrientationForPresentation
        }
        return super.preferredInterfaceOrientationForPresentation
    }
}

override open var supportedInterfaceOrientations: UIInterfaceOrientationMask{
    get {
        if let visibleVC = visibleViewController {
            return visibleVC.supportedInterfaceOrientations
        }
        return super.supportedInterfaceOrientations
    }
}}

Swift 3

override func viewDidLoad() {
    super.viewDidLoad()
    let value = UIInterfaceOrientation.landscapeLeft.rawValue
    UIDevice.current.setValue(value, forKey: "orientation")
}

private func supportedInterfaceOrientations() -> UIInterfaceOrientationMask {
    return UIInterfaceOrientationMask.landscapeLeft
}

private func shouldAutorotate() -> Bool {
    return true
}

Answer 19

Swift 3. This locks the orientation each time the user re-opens the app.

class MyViewController: UIViewController {
    ...
    override func viewDidLoad() {
        super.viewDidLoad()

        // Receive notification when app is brought to foreground
        NotificationCenter.default.addObserver(self, selector: #selector(self.onDidBecomeActive), name: NSNotification.Name.UIApplicationDidBecomeActive, object: nil)
    }

    // Handle notification
    func onDidBecomeActive() {
        setOrientationLandscape()
    }

    // Change orientation to landscape
    private func setOrientationLandscape() {
        if !UIDevice.current.orientation.isLandscape {
            let value = UIInterfaceOrientation.landscapeLeft.rawValue
            UIDevice.current.setValue(value, forKey:"orientation")
            UIViewController.attemptRotationToDeviceOrientation()
        }
    }

    // Only allow landscape left
    override var supportedInterfaceOrientations: UIInterfaceOrientationMask {
        return UIInterfaceOrientationMask.landscapeLeft
    }

    /*
    // Allow rotation - this seems unnecessary
    private func shouldAutoRotate() -> Bool {
        return true
    }
    */
    ...
}

Answer 20

I needed to force one controller into portrait orientation. Adding this worked for me.

swift 4 with iOS 11

override var   supportedInterfaceOrientations : UIInterfaceOrientationMask{

    return  .portrait

}

Answer 21

For me, the best results came from combining Zeesha's answer and sazz's answer.

Add the following lines to AppDelegate.swift:

var orientationLock = UIInterfaceOrientationMask.portrait
var myOrientation: UIInterfaceOrientationMask = .portrait
func application(_ application: UIApplication, supportedInterfaceOrientationsFor window: UIWindow?) -> UIInterfaceOrientationMask {
    return myOrientation
}  

Add the following line to your view controller class:

let appDel = UIApplication.shared.delegate as! AppDelegate

Add the following lines to your view controller's viewDidLoad():

appDel.myOrientation = .landscape
UIDevice.current.setValue(UIInterfaceOrientation.landscapeLeft.rawValue, forKey: "orientation")

(optional) Add this line to your dismiss function:

appDel.myOrientation = .portrait
UIDevice.current.setValue(UIInterfaceOrientation.portrait.rawValue, forKey: "orientation")

What these lines of code do is set the default orientation to portrait, rotate it landscape when the view controller loads, and then finally reset it back to portrait once the view controller closes.