Swiftで縦画面を固定するたったの10選

var message: String = "Hello Swift!"
let year: Int = 2023
print(message)
print("Year is \(year)")

import UIKit

class SampleViewController: UIViewController {

    // このViewControllerでサポートする画面の向きを指定
    override var supportedInterfaceOrientations: UIInterfaceOrientationMask {
        return .portrait
    }

    // 画面の向きを強制的に縦画面にする
    override var shouldAutorotate: Bool {
        return false
    }
}

import UIKit

class AppDelegate: UIResponder, UIApplicationDelegate {

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

import UIKit

class DetailViewController: UIViewController {

    // このViewControllerでサポートする画面の向きを指定
    override var supportedInterfaceOrientations: UIInterfaceOrientationMask {
        return .portrait
    }

    // 画面の向きを強制的に縦画面にする
    override var shouldAutorotate: Bool {
        return false
    }
}

import UIKit

class ConditionalViewController: UIViewController {

    // 縦画面固定を切り替えるための変数
    var shouldLockToPortrait = true

    // サポートする画面の向きを返す
    override var supportedInterfaceOrientations: UIInterfaceOrientationMask {
        return shouldLockToPortrait ? .portrait : .all
    }

    // ボタンアクションで縦画面固定を切り替える
    @IBAction func toggleLock(_ sender: UIButton) {
        shouldLockToPortrait.toggle()
        // 変更を即時反映させるためのコード
        UIViewController.attemptRotationToDeviceOrientation()
    }
}

import UIKit

class DesignAdjustViewController: UIViewController {

    @IBOutlet weak var centeredLabel: UILabel!

    override func viewWillLayoutSubviews() {
        super.viewWillLayoutSubviews()

        if UIDevice.current.orientation.isPortrait {
            centeredLabel.center = self.view.center
        }
    }
}

import UIKit

class AnimationViewController: UIViewController {

    @IBOutlet weak var animatedView: UIView!

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

        if UIDevice.current.orientation.isPortrait {
            UIView.animate(withDuration: 1.0) {
                self.animatedView.transform = CGAffineTransform(scaleX: 1.5, y: 1.5)
            }
        }
    }
}

import UIKit

class MixedOrientationViewController: UIViewController {

    var allowsLandscape = false

    override var supportedInterfaceOrientations: UIInterfaceOrientationMask {
        return allowsLandscape ? .all : .portrait
    }

    @IBAction func enableLandscapeMode(_ sender: UIButton) {
        allowsLandscape = true
        UIViewController.attemptRotationToDeviceOrientation()
    }
}

import UIKit

class OptimizedForDeviceViewController: UIViewController {

    @IBOutlet weak var responsiveLabel: UILabel!

    override func viewDidLoad() {
        super.viewDidLoad()

        if UIDevice.current.userInterfaceIdiom == .pad {
            responsiveLabel.font = UIFont.systemFont(ofSize: 24.0)
        } else {
            responsiveLabel.font = UIFont.systemFont(ofSize: 16.0)
        }
    }
}

import UIKit

class PortraitOnlyViewController: UIViewController {
    // このViewControllerでは縦画面のみをサポート
    override var supportedInterfaceOrientations: UIInterfaceOrientationMask {
        return .portrait
    }
}

class AllowLandscapeViewController: UIViewController {
    // このViewControllerでは縦画面・横画面をサポート
    override var supportedInterfaceOrientations: UIInterfaceOrientationMask {
        return .all
    }
}

import UIKit

class ResponsiveLayoutViewController: UIViewController {

    @IBOutlet weak var dynamicLabel: UILabel!

    override func viewDidLoad() {
        super.viewDidLoad()

        // デバイスのサイズに応じた調整
        if UIScreen.main.bounds.height > 800 {
            dynamicLabel.font = UIFont.systemFont(ofSize: 24.0)
        } else {
            dynamicLabel.font = UIFont.systemFont(ofSize: 16.0)
        }
    }
}

import UIKit

class CustomTransitionViewController: UIViewController, UIViewControllerTransitioningDelegate {

    override func viewDidLoad() {
        super.viewDidLoad()
        self.transitioningDelegate = self
    }

    // カスタムトランジションの設定
    func animationController(forPresented presented: UIViewController, presenting: UIViewController, source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
        return CustomTransitionAnimator()
    }
}

class CustomTransitionAnimator: NSObject, UIViewControllerAnimatedTransitioning {

    func transitionDuration(using transitionContext: UIViewControllerContextTransitioning?) -> TimeInterval {
        return 0.5
    }

    func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {
        // ここにカスタムアニメーションの詳細を記述
        // 例：フェードイン・フェードアウトのアニメーション
        guard let toViewController = transitionContext.viewController(forKey: .to) else { return }
        let containerView = transitionContext.containerView
        containerView.addSubview(toViewController.view)
        toViewController.view.alpha = 0.0
        UIView.animate(withDuration: transitionDuration(using: transitionContext), animations: {
            toViewController.view.alpha = 1.0
        }) { _ in
            transitionContext.completeTransition(true)
        }
    }
}

import UIKit

class DynamicOrientationViewController: UIViewController {

    var isPortraitLocked = true

    @IBAction func toggleOrientationLock(_ sender: UIButton) {
        isPortraitLocked.toggle()
        if isPortraitLocked {
            let value = UIInterfaceOrientation.portrait.rawValue
            UIDevice.current.setValue(value, forKey: "orientation")
        } else {
            let value = UIInterfaceOrientation.allButUpsideDown.rawValue
            UIDevice.current.setValue(value, forKey: "orientation")
        }
    }

    override var supportedInterfaceOrientations: UIInterfaceOrientationMask {
        return isPortraitLocked ? .portrait : .allButUpsideDown
    }
}

import UIKit

class GradientEffectViewController: UIViewController {

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

    func setGradientBackground() {
        let gradientLayer = CAGradientLayer()
        gradientLayer.colors = [UIColor.red.cgColor, UIColor.blue.cgColor]
        gradientLayer.locations = [0.0, 1.0]
        gradientLayer.frame = self.view.bounds
        self.view.layer.insertSublayer(gradientLayer, at: 0)
    }
}