在单视图iOS中禁用旋转

我正在尝试在iOS中禁用单个viewController的旋转，我看到一些关于自动旋转的问题，但没有任何问题

我想锁定视图B打开的方向，例如：在横向中打开，它只能是横向的，或者在纵向中打开，它只能是纵向的。同时仍然允许视图A成为它想要的任何方向

编辑 \n 这就是我所说的视图B

    [self.mediaFocusController showImageFromURL:url fromView:self.view withThumb:thumbUrl];

它是这样进入的：

if (self.targetViewController) {
    [self willMoveToParentViewController:self.targetViewController];
    if ([UIView instancesRespondToSelector:@selector(setTintAdjustmentMode:)]) {
        self.targetViewController.view.tintAdjustmentMode = UIViewTintAdjustmentModeDimmed;
        [self.targetViewController.view tintColorDidChange];
    }
    [self.targetViewController addChildViewController:self];
    [self.targetViewController.view addSubview:self.view];

    if (self.snapshotView) {
        [self.targetViewController.view insertSubview:self.snapshotView belowSubview:self.view];
        [self.targetViewController.view insertSubview:self.blurredSnapshotView aboveSubview:self.snapshotView];
    }
}
else {
    // add this view to the main window if no targetViewController was set
    if ([UIView instancesRespondToSelector:@selector(setTintAdjustmentMode:)]) {
        self.keyWindow.tintAdjustmentMode = UIViewTintAdjustmentModeDimmed;
        [self.keyWindow tintColorDidChange];
    }
    [self.keyWindow addSubview:self.view];

    if (self.snapshotView) {
        [self.keyWindow insertSubview:self.snapshotView belowSubview:self.view];
        [self.keyWindow insertSubview:self.blurredSnapshotView aboveSubview:self.snapshotView];
    }
}

我已设置NavigationController，但尝试此代码时此视图不同（我在中发现）：

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视图控制器B如何进入视图层次结构？你有导航控制器吗？制表符控制器？显示视图控制器？什么？不适合我：(

- (BOOL)shouldAutorotate
{
    id currentViewController = self.topViewController;

    if ([currentViewController isKindOfClass:[DetailViewController class]])
        return NO;

    return YES;
}