仅在一个ViewController中旋转 [英] Rotation only in one ViewController

问题描述

我正在尝试旋转一个视图，而所有其他视图（5）都固定为纵向。原因是在一个视图中我希望用户观看他之前保存的图片。我想这是可能的，但到目前为止，我无法弄清楚如何实现这一目标。任何人都可以帮忙或给我一个暗示吗？
我正在编程，在iOS8上运行Swift

I am trying to rotate one view while all other views (5) are fixed to portrait. The reason is that in that one view I want the user to watch pictures which he saved before. I guess this is possible but so far I couldn't figure out how to achieve that. Can anyone help or give me a hint? I am programming that in Swift running on iOS8

推荐答案

这是针对 Swift 3和Swift 4 即可。您可以在AppDelegate.swift中使用以下代码：

This is for Swift 3 and Swift 4. You can use the follow code in your AppDelegate.swift :

func application(_ application: UIApplication, supportedInterfaceOrientationsFor window: UIWindow?) -> UIInterfaceOrientationMask {
    guard let rootViewController = self.topViewControllerWithRootViewController(rootViewController: window?.rootViewController),
     (rootViewController.responds(to: Selector(("canRotate")))) else{
        // Only allow portrait (standard behaviour)
        return .portrait;
    }
    // Unlock landscape view orientations for this view controller
    return .allButUpsideDown;
}

private func topViewControllerWithRootViewController(rootViewController: UIViewController!) -> UIViewController? {
    guard rootViewController != nil else { return nil }

    guard !(rootViewController.isKind(of: (UITabBarController).self)) else{
        return topViewControllerWithRootViewController(rootViewController: (rootViewController as! UITabBarController).selectedViewController)
    }
    guard !(rootViewController.isKind(of:(UINavigationController).self)) else{
        return topViewControllerWithRootViewController(rootViewController: (rootViewController as! UINavigationController).visibleViewController)
    }
    guard !(rootViewController.presentedViewController != nil) else{
        return topViewControllerWithRootViewController(rootViewController: rootViewController.presentedViewController)
    }
    return rootViewController
}

您可以在原帖中了解更多信息： http://www.jairobjunior.com/blog/2016/03/05/how-to-rotate-only-one-view-controller-to-landscape-in​​-ios- slash-swift /

you can learn more in the original post: http://www.jairobjunior.com/blog/2016/03/05/how-to-rotate-only-one-view-controller-to-landscape-in-ios-slash-swift/

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