permission - iOS 6:旋轉後忽略父模式的modalPresentationStyle

ipad layout (2)

使用帶有iOS6的iPad，我們有一個錯誤，即模態視圖控制器將擴展到全屏，即使它被告知使用“表單”演示樣式。 但是，只有當有兩個模態，即父模式及其子模式時，才會發生這種情況。

這就是第一個模態的創建和呈現方式：

UINavigationController *navigationController = [[[UINavigationController alloc] initWithRootViewController:controller] autorelease];
navigationController.modalPresentationStyle = UIModalPresentationFormSheet;
[parentController presentModalViewController:navigationController animated:YES];
// parentController is my application's root controller

這是創建和呈現子模態的方式：

UINavigationController *navigationController = [[[UINavigationController alloc] initWithRootViewController:controller] autorelease];
navigationController.modalPresentationStyle = UIModalPresentationFormSheet;
[parentController presentModalViewController:navigationController animated:YES];
// parentController is the navigationController from above

因此，當從橫向旋轉到縱向時，即使我們旋轉回橫向，父模式也會擴展到全屏並保持這種狀態。

當我們擁有父模態本身（沒有子模態）時，它按預期工作，即它保持在表單樣式中。

請注意，這僅發生在iOS6（設備和模擬器）上，並且不會發生在iOS 5上（模擬器並報告由測試人員工作）。

到目前為止，我已經嘗試了以下但沒有成功：

• 將wantsFullScreenLayout設置為NO
• 強制wantsFullScreenLayout總是通過覆蓋它返回NO
• 在導航控制器中確定我的控制器也指定UIModalPresentationFormSheet
• 實現preferredInterfaceOrientationForPresentation
• 升級到iOS 6.0.1

謝謝！

更新 ：所以，我調整了Apple開發者論壇（ https://devforums.apple.com/message/748486#748486 ）的響應，以便它可以與多個嵌套模式一起使用。

- (BOOL) needNestedModalHack {
    return [UIDevice currentDevice].systemVersion.floatValue >= 6;
}

- (void) willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation
                                          duration:(NSTimeInterval)duration {

    // We are the top modal, make to sure that parent modals use our size
    if (self.needNestedModalHack && self.presentedViewController == nil && self.presentingViewController) {
        for (UIViewController* parent = self.presentingViewController;
             parent.presentingViewController;
             parent = parent.presentingViewController) {
            parent.view.superview.frame = parent.presentedViewController.view.superview.frame;
        }
    }

    [super willAnimateRotationToInterfaceOrientation:toInterfaceOrientation duration:duration];
}

- (void) willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation
                                 duration:(NSTimeInterval)duration {
    // We are the top modal, make to sure that parent modals are hidden during transition
    if (self.needNestedModalHack && self.presentedViewController == nil && self.presentingViewController) {
        for (UIViewController* parent = self.presentingViewController;
             parent.presentingViewController;
             parent = parent.presentingViewController) {
            parent.view.superview.hidden = YES;
        }
    }

    [super willRotateToInterfaceOrientation:toInterfaceOrientation duration:duration];
}

- (void) didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation {
    // We are the top modal, make to sure that parent modals are shown after animation
    if (self.needNestedModalHack && self.presentedViewController == nil && self.presentingViewController) {
        for (UIViewController* parent = self.presentingViewController;
             parent.presentingViewController;
             parent = parent.presentingViewController) {
            parent.view.superview.hidden = NO;
        }
    }

    [super didRotateFromInterfaceOrientation:fromInterfaceOrientation];
}