Question

既然interfaceOrientation UIViewController中的{{1}}不推荐使用，那么检测当前设备方向的推荐方法是什么？

Answer 1

您可以使用[UIApplication sharedApplication].statusBarOrientation

请注意[[UIDevice currentDevice] orientation] 不完全，就像申请轮换一样。文档：

<强>讨论：属性的值是一个常量，表示设备的当前方向。此值表示设备的物理方向，可能与应用程序用户界面的当前方向不同。有关可能值的说明，请参阅UIDeviceOrientation。

我会检查statusBarOrientation是否有效。

Answer 2

UIApplication.sharedApplication（）。statusBarOrientation有效，除非您从

调用它

func viewWillTransitionToSize(size: CGSize, withTransitionCoordinator coordinator: UIViewControllerTransitionCoordinator)

预测对新statusBarOrientation的更改

因此，如果您使用viewWillTransitionToSize进行更新基于方向（而不是大小等级）的设备，你被搞砸了并且必须使用类似的东西

extension UIViewController {
    public var orientation : UIInterfaceOrientation? {
        let orientation = UIDevice.currentDevice().orientation
        var converted : UIInterfaceOrientation!
        // UIApplication.sharedApplication().statusBarOrientation is trash cause it lags (being set to the value predating the transition reported by viewWillTransitionToSize)
        switch orientation {
        case .Portrait: // Device oriented vertically, home button on the bottom
            converted = .Portrait
        case .PortraitUpsideDown: // Device oriented vertically, home button on the top
            converted = .PortraitUpsideDown
        case .LandscapeLeft: // Device oriented horizontally, home button on the right
            converted = .LandscapeLeft
        case .LandscapeRight: // Device oriented horizontally, home button on the left
            converted = .LandscapeRight
        default:
            // let the caller do the dirty dancing with the status bar orientation or whatever
            return nil
        }
        return converted
    }
}

您可以这样使用：

    // willRotateToInterfaceOrientation(toInterfaceOrientation: UIInterfaceOrientation, duration: NSTimeInterval) is deprecated.
    // thusly I have to use the size classes method and compute interface orientation from the device orientation
    override func viewWillTransitionToSize(size: CGSize, withTransitionCoordinator coordinator: UIViewControllerTransitionCoordinator) {
        super.viewWillTransitionToSize(size, withTransitionCoordinator: coordinator)
        guard let converted = orientation else {
            //            alert("something else that I do not [need to] handle")
            return
        }
        if converted.isLandscape {
            adjustViewsForOrientation(converted, withTransitionCoordinator: coordinator)
        } else if converted.isPortrait {
            adjustViewsForOrientation(converted, withTransitionCoordinator: coordinator)
        }
    }

我不知道如何走出这个勇敢的新世界（吮吸）令人信服的appple of undeprecating willRotateToInterfaceOrientation 与autoresizingMask相同的方式（除非他们有意不要弃用autoresizingMask; - ）

或者将interfaceorientation作为第三个参数注入到 viewWillTransitionToSize（size：CGSize，withTransitionCoordinator coordinator：UIViewControllerTransitionCoordinator）

Answer 3

在Swift中，您可以使用

获取它

let orientation: UIInterfaceOrientation = UIApplication.shared.statusBarOrientation

Answer 4

for iPad

[[UIDevice currentDevice] orientation];

如何知道iOS 8中的当前interfaceOrientation？

4 个答案: