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

Sometimes when you're using a custom navigation flow (that may get really complex) the above-mentioned solutions may not always work. Besides, if you have several ViewControllers that need support for multiple orientations it may get quite tedious.

Here's a rather quick solution I found. Define a class OrientationManager and use it to update supported orientations in AppDelegate:

class OrientationManager {
    static var landscapeSupported: Bool = false
}

Then in AppDelegate put the orientations you want for that specific case:

func application(_ application: UIApplication, supportedInterfaceOrientationsFor window: UIWindow?) -> UIInterfaceOrientationMask {
        if OrientationManager.landscapeSupported {
            return .allButUpsideDown
        }
        return .portrait
    }

Then in the ViewControllers that you want to have multiple navigations update the OrientationManager:

override func viewDidAppear(_ animated: Bool) {
    super.viewDidAppear(animated)
    OrientationManager.landscapeSupported = true
}

Also, don't forget to update it once again when you'll be exiting this ViewController:

override func viewWillDisappear(_ animated: Bool) {
    super.viewWillDisappear(animated)
    OrientationManager.landscapeSupported = false
    //The code below will automatically rotate your device's orientation when you exit this ViewController
    let orientationValue = UIInterfaceOrientation.portrait.rawValue
    UIDevice.current.setValue(orientationValue, forKey: "orientation")
}

Hope this helps!

Update:

You may just want to add a static func to your Orientation Support Manager class:

    static func setOrientation(_ orientation: UIInterfaceOrientation) {
        let orientationValue = orientation.rawValue
        UIDevice.current.setValue(orientationValue, forKey: "orientation")
        landscapeSupported = orientation.isLandscape
    }

Then you can call this function whenever you need to set the orientation back to portrait. That will also update the static landscapeSupported value:

OSM.setOrientation(.portrait)