iOS 特定页面横屏设置

最近在做腾讯超级播放器，在横屏状态需要显示键盘，所以需要自己实现controller的横屏设置(因为腾讯超级播放器是view单独横屏的)
废话不多说，说下解决方案（这里的场景是push的）

工程设置如图

image.png

设置设备横屏代码

extension UIDevice {
    static func switchOrientation(_ orientation: UIInterfaceOrientation) {
        let orientationTarget = NSNumber(value: orientation.rawValue)
        
        UIDevice.current.setValue(orientationTarget, forKey: "orientation")
    }
}

Appdelegate中需要初始化属性

var allowRotation: Bool = false

并实现

func application(_ application: UIApplication, supportedInterfaceOrientationsFor window: UIWindow?) -> UIInterfaceOrientationMask {
        if allowRotation {
            return [.landscapeRight, .landscapeLeft]
        } else {
            return .portrait
        }
    }

调用就很简单了

let app = AppDelegate.app()
        if player.isFullScreen {
            let originRotation = UIDevice.current.orientation
            if UIDevice.current.orientation.isLandscape {
                UIDevice.switchOrientation(UIInterfaceOrientation(rawValue: originRotation.rawValue) ?? .landscapeRight)
            } else {
                UIDevice.switchOrientation(.landscapeRight)
            }
            app?.allowRotation = true

            app?.allowRotation = false // 旋转后必须重设，否则手动全屏后，选装手机，会造成退出全屏，但是controller还是横屏的bug
        } else {
            app?.allowRotation = false

            UIDevice.switchOrientation(.portrait)
        }

        UIViewController.attemptRotationToDeviceOrientation()

期间遇到一些奇奇怪怪的问题，还是自己对这方面不熟悉吧

因为工程没有设置横屏，导致以上代码，连接Xcode Debug的时候，横屏一点问题没有，但是当断开Xcode连接，就没办法横屏了，
后来在对应controller下实现了如下方法, 断开连接就也没问题了

 override var shouldAutorotate: Bool {
        return true
    }

    override var supportedInterfaceOrientations: UIInterfaceOrientationMask {
        return [.portrait, .landscapeRight, .landscapeLeft]
    }

    override var preferredInterfaceOrientationForPresentation: UIInterfaceOrientation {
        return .portrait
    }

注意：如果rootController有navigationcontroller 或者 tabbarController 需要对应设置
navigationController

override var shouldAutorotate: Bool {
        return self.topViewController?.shouldAutorotate ?? false
    }
    
    override var supportedInterfaceOrientations: UIInterfaceOrientationMask {
        return self.topViewController?.supportedInterfaceOrientations ?? .portrait
    }
    
    override var preferredInterfaceOrientationForPresentation: UIInterfaceOrientation {
        return self.topViewController?.preferredInterfaceOrientationForPresentation ?? .portrait
    }

tabbarController

override var shouldAutorotate: Bool {
        return self.selectedViewController?.shouldAutorotate ?? false
    }
    
    override var supportedInterfaceOrientations: UIInterfaceOrientationMask {
        return self.selectedViewController?.supportedInterfaceOrientations ?? .portrait
    }
    
    override var preferredInterfaceOrientationForPresentation: UIInterfaceOrientation {
        return self.selectedViewController?.preferredInterfaceOrientationForPresentation ?? .portrait
    }

到此为止，整个横屏设置算是完整了

一定要刷新当前控制器
UIViewController.attemptRotationToDeviceOrientation()

参考资料连接如下
在特定的View Controller允许屏幕旋转
iOS强制横屏总结

今天遇到present controller 默认进入横屏，设置 preferredInterfaceOrientationForPresentation 不生效的问题， 需要检查一下 需要present 的Vc的 modalPresentationStyle，我设置为overCurrentContext 横屏失败，设置为 overFullScreen就对了，有点蒙