Setting Device Orientation in Swift Ios

Setting device orientation in Swift iOS

You can paste these methods in the ViewController of each view that needs to be portrait:

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

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

iOS Swift 5 Change device orientation manually

One simple way to accomplish this is by setting your supported orientation on the AppDelegate (_:supportedInterfaceOrientationsFor:)

Create a local variable there

var orientation: UIInterfaceOrientationMask = .portrait

and then return that variable as supported orientation

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

on the ViewController that you want to rotate with a touch of a button, you can change the supported orientation on the app delegate and than force the device orientation to change so that the view is rotated

    private func changeSupportedOrientation() {
        let delegate = UIApplication.shared.delegate as! AppDelegate
        switch delegate.orientation {
        case .portrait:
            delegate.orientation = .landscapeLeft
        default:
            delegate.orientation = .portrait
        }
    }

    @IBAction func rotateButtonTapped(_ sender: UIButton) {
        changeSupportedOrientation()
        switch UIDevice.current.orientation {
        case .landscapeLeft:
            UIDevice.current.setValue(UIDeviceOrientation.portrait.rawValue, forKey: "orientation")
        default:
            UIDevice.current.setValue(UIDeviceOrientation.landscapeLeft.rawValue, forKey: "orientation")
        }
    }

this will force the orientation of the device to change and then rotate your view. If you tap on the button again the orientation will be back to .portrait

Please be careful of using this as you need to really consider your navigation stack to make sure that only the top of the navigation stack support rotation and can only be pop from the navigation stack after the orientation is set back to the original which is .portrait only.

How to change Device Orientation programmatically in Swift?

For each VC declare this variable w/ desired orientation. This is for portrait.

override var supportedInterfaceOrientations: UIInterfaceOrientationMask { return .portrait }   

Then on appearance enforce the desired orientation.

override func viewDidAppear(_ animated: Bool) {
  super.viewDidAppear(animated)
  UIView.setAnimationsEnabled(false)
  UIDevice.current.setValue(UIInterfaceOrientation.portrait.rawValue, forKey: "orientation")
  UIView.setAnimationsEnabled(true)
}

Swift - How to detect orientation changes

let const = "Background" //image name
let const2 = "GreyBackground" // image name
    @IBOutlet weak var imageView: UIImageView!
    override func viewDidLoad() {
        super.viewDidLoad()

        imageView.image = UIImage(named: const)
        // Do any additional setup after loading the view.
    }

    override func viewWillTransition(to size: CGSize, with coordinator: UIViewControllerTransitionCoordinator) {
        super.viewWillTransition(to: size, with: coordinator)
        if UIDevice.current.orientation.isLandscape {
            print("Landscape")
            imageView.image = UIImage(named: const2)
        } else {
            print("Portrait")
            imageView.image = UIImage(named: const)
        }
    }

Lock the orientation of the app in a specific View Controller in Swift

You can force orientation with few steps:

Firstly, In your AppDelegate define a orientation property and conform supportedInterfaceOrientationsFor

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

Then declare utility struct to set orientation using KVO:

struct AppOrientationUtility {
    static func lockOrientation(_ orientation: UIInterfaceOrientationMask) {
        if let delegate = UIApplication.shared.delegate as? AppDelegate {
            delegate.orientationLock = orientation
        }
    }
        
    static func lockOrientation(_ orientation: UIInterfaceOrientationMask, andRotateTo rotateOrientation: UIInterfaceOrientation) {
        self.lockOrientation(orientation)
        UIDevice.current.setValue(rotateOrientation.rawValue, forKey: "orientation")
    }
}

How to use:

//For portrait
AppOrientationUtility.lockOrientation(UIInterfaceOrientationMask.portrait, andRotateTo: UIInterfaceOrientation.portrait)

//For landscape
AppOrientationUtility.lockOrientation(UIInterfaceOrientationMask.landscapeRight, andRotateTo: UIInterfaceOrientation.landscapeRight)

How to update the UI when the device orientation changed in Swift?

Actually by using

loginView.frame = CGRect(origin: .zero, size: view.bounds.size)

you assign a frame to your login view which will not change on device rotation.

you might wanna use a constraint approach here as well:

// try replacing
// loginView.frame = CGRect(origin: .zero, size: view.bounds.size)

// with
 loginView.translatesAutoresizingMaskIntoConstraints = false
 NSLayoutConstraint.activate([
    loginView.leadingAnchor.constraint(equalTo: view.leadingAnchor),
    loginView.trailingAnchor.constraint(equalTo: view.trailingAnchor),
    loginView.topAnchor.constraint(equalTo: view.topAnchor),
    loginView.bottomAnchor.constraint(equalTo: view.bottomAnchor)
 ])

Another approach would be updating the frame of your login view e.g.

override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {
   super.traitCollectionDidChange(previousTraitCollection)
   loginView.frame = CGRect(origin: .zero, size: view.bounds.size)
}

Last but not least you can use autoresizingMask in viewDidLoad

loginView.frame = CGRect(origin: .zero, size: view.bounds.size)
loginView.autoresizingMask = [.flexibleHeight, .flexibleWidth]

P.S. My previous comment was misleading since the login frame wasn't set in the setupStackView() function

and my final comment:

// you can replace
loginView.frame = CGRect(origin: .zero, size: view.bounds.size)
// with
loginView.frame = view.bounds

Swift: Changing view/screen depending on device orientation. What is efficiency wise the better option?

I'd definitely go for an option number 2.

That way you encapsulate all the logic related to the calendar, for example for adding event or displaying it, in one view controller, without the need to reimplement the sane logic somewhere else (eg other view controller with landscape mode). Having two views for a different layout modes is not THAT easy to maintain, but if that's the only way to show the difference between the modes it really is a fine solution. And it's much easier to maintain than two view controllers with the very similar logic.

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