我正在使用ARKit,我希望允许用户在纵向和横向模式下使用该应用程序。
除了ARSCNView
之外,我希望所有UI控件都可以在方向更改时旋转。
我试图在相反的方向上转换sceneView但是没有用。
override func viewWillTransition(to size: CGSize, with coordinator: UIViewControllerTransitionCoordinator) {
super.viewWillTransition(to: size, with: coordinator)
let targetRotation = coordinator.targetTransform
let inverseRotation = targetRotation.inverted()
coordinator.animate(alongsideTransition: { (context) in
self.sceneView.transform = self.sceneView.transform.concatenating(inverseRotation)
context.viewController(forKey: UITransitionContextViewControllerKey.from)
}, completion: nil)
}
如何阻止ARKit会话的场景视图旋转,同时允许所有其他UI控件在方向更改时旋转?
答案 0 :(得分:0)
您无法在视图的基础上指定设备轮换规则。它必须在视图控制器的基础上设置。这就是iOS的工作原理。因此,要实现您所需要的,您必须自己处理。例如,如果您将ARSCNView
显示为全屏视图,则可以将其显示在自定义UIViewController
子类中,并设置该控制器的旋转配置。
为特定视图控制器设置支持的视图旋转可以通过多种方式实现,下面是其中一些。
您可以通过覆盖应用代理的方法UIViewController
来为任何application:supportedInterfaceOrientationsForWindow:
设置支持的视图方向。
示例代码:
// this goes into your AppDelegate...
// Basically, this checks the current visible view controller type and decide
// what orientations your app supports based on that view controller type (class)
func application(_ application: UIApplication, supportedInterfaceOrientationsFor window: UIWindow?) -> UIInterfaceOrientationMask {
let visibleViewController = self.topViewController(withRootViewController: window?.rootViewController)
// Support only portrait orientation for a specific view controller
if visibleViewController is SomeViewController {
return .portrait
}
// Otherwise, support all orientations (standard behaviour)
return .allButUpsideDown
}
// This simple helper method is to extract the exact visible view controller at
// the moment, as `window.rootViewController` could have some container controller
// like `UINavigationController` or so that holds more controllers into it
private func topViewController(withRootViewController rootViewController: UIViewController?) -> UIViewController? {
if let rootViewController = rootViewController as? UITabBarController {
return rootViewController.selectedViewController
} else if let rootViewController = rootViewController as? UINavigationController {
return rootViewController.visibleViewController
} else if let presentedViewController = rootViewController?.presentedViewController {
return topViewController(withRootViewController: presentedViewController)
}
return rootViewController
}
参考:
application:supportedInterfaceOrientationsForWindow:
method documentation
对您的UINavigationController
进行子类并覆盖以下属性:
override var supportedInterfaceOrientations: UIInterfaceOrientationMask {
return self.topViewController?.supportedInterfaceOrientations ?? .all
}
现在,它始终会查看视图控制器的supportedInterfaceOrientations
,并根据返回值设置支持的方向。这样做可以让您在所需的任何视图控制器中简单地覆盖它,设置一些自定义值。
例如,在SomeViewController
中,您只需添加:
override var supportedInterfaceOrientations: UIInterfaceOrientationMask {
return .portrait
}
参考:
supportedInterfaceOrientations
property documentation
如果您不想在上面的方法#2中对UINavigationController
进行细分,则可以将SomeViewController
设置为实施navigationControllerSupportedInterfaceOrientations(:)
示例代码:
override func viewDidLoad() {
super.viewDidLoad()
// ...
self.navigationController?.delegate = self
}
// MARK: - UINavigationControllerDelegate
func navigationControllerSupportedInterfaceOrientations(_ navigationController: UINavigationController) -> UIInterfaceOrientationMask {
return navigationController.topViewController?.supportedInterfaceOrientations ?? .all
}
参考: