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ViewControllerごとに画面の向きを固定する

Posted at

ViewControllerごとに画面の向きを固定するには、

  • shouldAutorotate
  • supportedInterfaceOrientations

をオーバーライドすればいい

MyViewController.swift
class MyViewController: UIViewController {
    ...
    // 画面を自動で回転させるか
    override var shouldAutorotate: Bool {
        get {
            return false
        }
    }
    
    // 画面の向きを指定
    override var supportedInterfaceOrientations: UIInterfaceOrientationMask {
        get {
            return .portrait
        }
    }
    ...
}

ただ、

  • UINavigationController
  • UITabBarController
  • UIPageViewController

なんかを使ってるとMyViewControllerに書いても動いてくれない
MyNavigationControllerを作ってもいいけれど、これだけのために用意するのは少々面倒なので、AppDelegateに以下を追加して対応

AppDelegate.swift
extension UINavigationController {
    open override var shouldAutorotate: Bool {
        guard let viewController = self.visibleViewController else { return true }
        return viewController.shouldAutorotate
    }
    
    open override var supportedInterfaceOrientations: UIInterfaceOrientationMask {
        guard let viewController = self.visibleViewController else { return .all }
        return viewController.supportedInterfaceOrientations
    }
}

これで、各ViewControllerでオーバーライドした設定がちゃんと反映された

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