UINavigationBar autoresizing

Question

In my app, I got a UINavigationController. Unfortunately, when I rotate the device and the interface orientation changes, the UINavigationBar doesn\'t change its height. In

Answer 1

I think this one is kind of similar to you and they have the code snippet:

iPhone: UINavigationBar with buttons - adjust the height

Answer 2

I've done a little testing, and although I don't like the method, it's quite easy to do.

Having looked for a private method that may have worked, I couldn't find one. All I found was:

@property BOOL forceFullHeightInLandscape;

- (BOOL)isMinibar;

There is no setter for -isMinibar, so we can't set that. I guess that it returns a value based on its height. Also, forceFullHeightInLandscape was set to NO, however it still didn't adjust its height.

While changing the autoresizingMask to include UIViewAutoresizingFlexibleHeight, the view did resize to be smaller, but now it was too small. However, -isMinibar suddenly returned YES. So that made me think of just letting the view resize itself, adjusting it to the right height.

So there we go, a method that works, even without private API calls:

- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration {
    [self.navigationBar performSelector:@selector(sizeToFit) withObject:nil afterDelay:(0.5f * duration)];
}

---

One thing you'll have to deal with is that the views below the bar won't get adjusted to the smaller bar, so that there will be a gap between the bar and the views below. Easiest way to solve this is to add a container view, just like the case with a UINavigationController. You'd come up with something like:

- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration {
    [self performSelector:@selector(resizeViewsForNavigationBar) withObject:nil afterDelay:(0.5f * duration)];
}

- (void)resizeViewsForNavigationBar {
    [self.navigationBar sizeToFit];

    // Resize containerView accordingly.
    CGRect containerViewRect = self.containerView.frame;
    containerViewRect.origin.y = CGRectGetMaxY(self.navigationBar.frame);
    containerViewRect.size.height = CGRectGetMaxY(self.view.frame) - containerViewRect.origin.y;
    self.containerView.frame = containerViewRect;
}

Answer 3

Thanks to Joost I've added

@property BOOL forceFullHeightInLandscape;

to my custom UINavigationBar class. And set in :

-(id)initWithFrame:(CGRect)frame{
forceFullHeightInLandscape = YES;

Worked like a charm

Answer 4

(void)viewWillLayoutSubviews {
      self.navigationItem.titleView.bounds = self.navigationController.navigationBar.bounds;
}

Answer 5

Similar to Joost's answer, but putting the method in willAnimateRotationToInterfaceOrientation has a better animation effect than willRotateToInterfaceOrientation. (There's no animation delay)

- (void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration {
    [self.navigationBar sizeToFit];
}

Answer 6

I think the behavior you want only happens when a navigation controller ( which represents the bars (navigation or toolbar)), is added to the window in the app delegate or presented by a tab bar, etc.

You can add a navigation bar via IB or code, it doesn't mean you have a navigation controller. My opinion is, create a navigation controller and initialize it with the view controller you're working in. Probably when the view rotates, the nav bar will shrink a little, the way you like.

Hope this helps