iOS 8 中显示 UIAlertView 时应用程序旋转

Question

我正在开发一款主要用于纵向模式的应用（少数视图除外）。我们在 iOS 8 中遇到了一个问题，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及其 shouldAutorotate 方法 returns 不。当 UIAlertView 旋转到横向时，旋转甚至还没有完全旋转，但底层视图仍处于纵向模式。如果我们运行中的应用程序在 iOS 7.

中就没有问题

我知道 UIAlertView 在 iOS 8 中已被弃用，我们现在应该使用 UIAlertController。但是，我真的很想避免必须替换它，因为这意味着编辑 50+ 类使用 UIAlertView 和 UIAlertViewDelegate。此外，我们仍然支持 iOS 7，所以我必须同时拥有这两种解决方案。当我们完全切换到 iOS 8.

时，我宁愿只需要这样做一次

Answer 1

在您的应用程序委托中：（这只是一个 hack。我很高兴看到更优雅的解决方案）

- (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 2

我的应用程序遇到了类似的问题，我通过子类化

解决了它

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; }

Answer 3

只需将其放入您的 UIApplicationDelegate 实现中

Swift

@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)
    }
}

}

Objective-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

iOS 8 中显示 UIAlertView 时应用程序旋转

App rotates when UIAlertView is shown in iOS 8

iphone

uiviewcontroller

uialertview

ios

ios8