仅在一个ViewController中旋转

Question

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。原因是在该视图中，我希望用户观看以前保存的图片。我想这是可能的，但到目前为止我还不知道如何实现。谁能帮忙或给我提示吗？我正在在iOS8上运行的Swift中编程

Answer 1

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

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
}

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