Comments on: UIToolbars in iPhone OS 2.x

By: Chris Leong

Chris Leong — Wed, 22 Sep 2010 07:48:53 +0000

In CWToolbarController’s function loadView I set the CGRect frame to [[UIScreen mainScreen] applicationFrame]. That fixed the sizing problem

By: Michael

Michael — Wed, 07 Oct 2009 17:28:22 +0000

still doesn’t compile as Mario mentioned.

By: Mario

Mario — Wed, 09 Sep 2009 22:15:46 +0000

awesome post but it doesn’t compile on snow leopard iPhone OS 3.0

By: Wash

Wash — Sun, 30 Aug 2009 15:17:39 +0000

Fredrik,
I have been looking for an explanation like that for a while. Although I still have not really understood what you did (FYI: I’m very new at cocoa dev), I really appreciate the explanation. Here go a few questions: 1) yes, the duplicate _toolbarItems. any chance you can fix it in the code for us less advanced folks? 2) half of the toolbar is under the clock. how’s that fixed?? 3) as I reach level 7 and click on the table cell. the application traps??? 4) where would one implement the doStuff: that it’s in the toolbar???? finally, 5) if I wanted to write a label in small font right justified on the Nav Bar (in addition to the title) m how would I do it?????

Thank you again so much and sorry about many questions but you have the one tutorial that I found worth using for my project.

By: Jarmo

Jarmo — Fri, 19 Jun 2009 16:02:40 +0000

Ben, starting in OS 3.0 UINavigationController has an optional toolbar feature and it’s introduced a name conflict. So you could either make use of that native feature instead of Frederik’s method. Or potentially just rename your local toolbarItems member variable to something unused, such as my_toolbarItems.

By: Fredrik Olsson

Fredrik Olsson — Thu, 18 Jun 2009 07:57:27 +0000

The new API:s are not added to UIToolbar itself, but to UINavigationController and UIViewController. UIViewController now has a toolbarItems property, that is an array of UIBarButtonItems. The UINavigationController will query this array and use the contents as view controlelrs are pushed and popped to contextually update it’s toolbar.

That is the UINavigationController now handles a UIToolbar at the bottom of the screen, in addition to the UINavigationBar at the top of the screen.

By: Andy

Andy — Thu, 18 Jun 2009 07:45:45 +0000

What are the new API’s added for contextual UIToolbars in iPhoneOS 3.0? I can’t find much updated for UIToolbar other than the new translucent property. I’m having issues with my toolbar auto-rotating and i’m wondering if it was made easier in iPhoneOS 3.0. Thanks!

By: Fredrik Olsson

Fredrik Olsson — Wed, 17 Jun 2009 07:20:28 +0000

No I have not got rotation to work properly fo all cases, with good performance. I spoke with the Apple engineers about this at WWDC09, and their short answer is that for iPhone OS 2.x it is not easily done without some ugly hacks.

Move on to iPhone OS 3.0 if screen rotation is a required feature.

By: Fredrik Olsson

Fredrik Olsson — Wed, 17 Jun 2009 07:18:06 +0000

Easy solution is to rename _toolbaritems. I do however recomend that you instead use the toolbar support in iPhone OS 3.0.

By: Ben

Ben — Mon, 15 Jun 2009 14:21:19 +0000

In Iphone OS 3 it wont compile and gets the error “Error: duplicate member ‘_toolbatitems’”

Is there a solution to this?

By: Rob

Rob — Sun, 14 Jun 2009 17:20:03 +0000

Any chance you’ve been able to get the rotation actually working correctly ? Seems to give some strange results even after setting all the autoresizing masks on the view and content view..

By: Johan De Cock

Johan De Cock — Fri, 22 May 2009 12:46:02 +0000

Your forgot to add overrides for things like viewWillAppear events in your toolbar controller, which should be something like this:

- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
[_contentViewController viewWillAppear:animated];
}

Otherwise these events won’t get fired in your child viewcontrollers!

By: Fredrik Olsson

Fredrik Olsson — Sat, 09 May 2009 13:39:26 +0000

@Patrick: First you must implement shouldAutorotateToInterfaceOrientation: in CWToolbarController. Prefably let it return what the contentViewController responds.

Then you must setup proper auto resizing masks in loadView of CWToolbarController. All views except the toolbar should flex in size, the toolbar should only flex in with and top margin.

Then you must create a custom subclass of UIView, that implements layoutSubviews. This is because UINavigationController makes some assumptions, that will screw up the layout, placing it’s content behind the toolbar. Cut and paste the layout that is done in loadView.

Hope it helps.

By: Patrick

Patrick — Fri, 08 May 2009 05:32:40 +0000

Great article, thanks.

Could you give some additional hints on how to handle orientation changes? I’m finding that the navigation controller and toolbar controller rotate fine, but the content view controller doesn’t.

By: Robert

Robert — Sat, 02 May 2009 10:18:45 +0000

Nice article, thanks.

The top images are broken because they are linked to https, and if FF doesn’t know the certificate, it won’t show the image.

By: Andreas

Andreas — Thu, 30 Apr 2009 11:37:18 +0000

Thanks for this excellent article. I agree with you that many posts found on this topic offer somewhat screwed solutions.

I’ll use what I’ve read (and tried) here in order to develop a tabbar with a small bar above the tabs similar to what can be seen in the Bloomberg or AOL finance apps.

By: Fredrik Olsson

Fredrik Olsson — Wed, 08 Apr 2009 07:52:41 +0000

@Darren: Should work now, yet another problem with https and wordpress .

By: Darren

Darren — Wed, 08 Apr 2009 05:10:20 +0000

The source link is broke please fix

By: links for 2009-03-29 at adam hoyle presents suckmypixel

links for 2009-03-29 at adam hoyle presents suckmypixel — Sun, 29 Mar 2009 12:30:41 +0000

[...] UIToolbars in iPhone OS 2.x | Jayway Team Blog – Sharing Experience Provides a best practise suggestion for managing UIToolbars within nested views (using a UINavigationController) (tags: iphone programming objective-c UIToolbar reference UINavigationController) [...]

By: Contextual UIToolbars at Under The Bridge

Contextual UIToolbars at Under The Bridge — Fri, 27 Mar 2009 02:31:13 +0000

[...] an excellent post on how to manage UIToolbars in nested views … at least if you need to do it right now; we [...]

By: Fredrik Olsson

Fredrik Olsson — Thu, 26 Mar 2009 16:42:59 +0000

I would not advice you against hiding the toolbar when the user navigates up and down the view tree, I think it is better to let the navigation bar and the toolbar be static. But if you really want to, then add code in navigationController:willShowViewController:animated:. Wrap the code in [UIView beginAnimations:context:] and [UIView commitAnimations] to have the content and toolbar animate nicely in and out. Most view properties are animatable this way, so simple set frame, alpha or some other properties you fancy to update the layout.

By: losLocKos

losLocKos — Wed, 25 Mar 2009 18:17:33 +0000

hos is it possible to hide the toolbar, when the next view is pushed … an to let reappear the toolbar, when your’e back at the first view?

By: Fredrik Olsson

Fredrik Olsson — Sun, 22 Mar 2009 18:32:47 +0000

Thanks for the heads up, I have updated the image links. Hope it works better for everyone now.

By: Kalle

Kalle — Sun, 22 Mar 2009 18:00:31 +0000

They seem to be broken because they are loaded over https….

By: Kalle

Kalle — Sun, 22 Mar 2009 17:59:31 +0000

Great post! However, the two top images are broken for me