Question

当它从一个ViewController推到另一个View Controller时，我想更改View的方向。就像按下时一样，应该将其变成人像才能变成风景。

我尝试使用此代码，但无法正常工作。

在ViewDidLoad

struct AppUtility {
        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")
        }
    }

在ViewController

override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        AppDelegate.AppUtility.lockOrientation(UIInterfaceOrientationMask.landscapeRight, andRotateTo: UIInterfaceOrientation.landscapeRight)
    }

但是它不会改变其方向。

Answer 1

在应用程序委托中

import UIKit
let appDelegate = UIApplication.shared.delegate as! AppDelegate
@UIApplicationMain

class AppDelegate: UIResponder, UIApplicationDelegate {

    var window: UIWindow?

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

在UIViewController中

override func viewWillAppear(_ animated: Bool) {
        appDelegate.deviceOrientation = .landscapeLeft
        let value = UIInterfaceOrientation.landscapeLeft.rawValue
        UIDevice.current.setValue(value, forKey: "orientation")
    }

Answer 2

我已经实现了相同的代码并遇到了相同的问题，因此我在调用“ lockOrientation”并解决它之前添加了以下代码。

UIDevice.current.setValue(UIInterfaceOrientationMask.landscapeRight.rawValue, forKey: "orientation")
UIViewController.attemptRotationToDeviceOrientation()

Swift：使用PushViewConteroller更改方向

2 个答案: