Question

我正在开发一个主要用于纵向模式的应用程序（除少数视图外）。我们在iOS 8中遇到一个问题，即当显示UIViewAlert时应用程序能够旋转，即使底层视图控制器仅支持纵向方向且其shouldAutorotate方法返回NO。 UIAlertView旋转到横向时旋转甚至不满，但底层视图仍处于纵向模式。如果我们在iOS 7中运行应用程序，则没有问题。

我知道在iOS 8中已弃用UIAlertView，我们现在应该使用UIAlertController。但是，我真的希望避免替换它，因为这意味着要编辑50多个使用UIAlertView和UIAlertViewDelegate的类。此外，我们仍然支持iOS 7，所以我必须有两个解决方案。当我们完全切换到iOS 8时，我宁愿只做一次。

Answer 1

将其放入UIApplicationDelegate实施

中

<强>夫特

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

var window: UIWindow?

func application(application: UIApplication, supportedInterfaceOrientationsForWindow window: UIWindow?) -> Int {
    if window == self.window {
        return Int(UIInterfaceOrientationMask.All.rawValue)  // Mask for all supported orientations in your app
    } else {
        return Int(UIInterfaceOrientationMask.Portrait.rawValue) // Supported orientations for any other window (like one created for UIAlert in iOS 8)
    }
}

}

<强>目标C

@implementation AppDelegate

- (NSUInteger)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window {
    if (window == self.window) {
        return UIInterfaceOrientationMaskAll; // Mask for all supported orientations in your app
    } else {
        return UIInterfaceOrientationMaskPortrait; // Supported orientations for any other window (like one created for UIAlert in iOS 8)
    }
}

@end

Answer 2

在你的应用代表:(这只是一个黑客。我很高兴看到一个更优雅的解决方案）

- (NSUInteger)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window
{
    UIViewController *presentedViewController = window.rootViewController.presentedViewController;
    if (!presentedViewController) {
        return UIInterfaceOrientationMaskAllButUpsideDown;
    }

    Class alertControllerClass = NSClassFromString(@"UIAlertController");
    if (!alertControllerClass) {
        return UIInterfaceOrientationMaskAllButUpsideDown;
    }
    if ([presentedViewController isKindOfClass:alertControllerClass] || [presentedViewController.presentedViewController isKindOfClass:alertControllerClass]) {
        return UIInterfaceOrientationMaskPortrait;
    }
    return UIInterfaceOrientationMaskAllButUpsideDown;
}

Answer 3

我的app遇到了类似的问题，我通过继承

解决了这个问题

UIAlertViewController

并实施这些定位方法

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    return ((interfaceOrientation == UIInterfaceOrientationLandscapeLeft) || (interfaceOrientation == UIInterfaceOrientationLandscapeRight)); }

- (BOOL)shouldAutorotate {
    return YES; }

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation {
    return UIInterfaceOrientationLandscapeRight; }

当iOS 8中显示UIAlertView时，App会旋转

3 个答案: