I have a UISearchDisplayController that works perfectly in one of my iOS6 app. Now, I want to migrate this app to iOS7.
I had read the Apple docs, and it says the following :
Starting in iOS 7.0, you can use a search display
controller with a navigation bar (an instance of
the UINavigationBar class) by configuring the
search display controller’s displaysSearchBarInNavigationBar
and navigationItem properties.
displaysSearchBarInNavigationBar is pretty easy to set up. But the only clue I have for navigationItem is the following :
Important: The system raises an exception if you
attempt to set the titleView property for a search
display controller’s navigation item.
I can't seem to find example of how to set the navigationItem. How to I say to my navigationBar to embed my searchBar? Somebody can show me an example?
Thank you in advance!
UISearchDisplayController creates and manages the navigation item needed to display the search bar in the navigation bar. You don't need to create your own, although you can access it via searchDisplayController.navigationItem after displaysSearchBarInNavigationBar has been set to YES (the navigationItem is created lazily)
When the view controller with the search display controller is asked for its navigationItem, the search display controller will return its item (which contains the search bar) instead of the view controller's.
Related
I'm trying to use UIDocumentInteractionController to show a PDF with a TOS and Privacy policy in my app. I either want to change the color of the status bar to match my nav bar color or I want to remove the status bar. I'm able to remove it but it leaves the 20pt spacing for it still. I'm thinking I'm unable to make this work because UIDocumentInteractionController inherits from NSObject not UIViewController, and loads some second UIViewController which one can't get access to. Ideas? Here's a screenshot:
Check this documentation
In short: if you return your navigation controller in that method the preview should respect the navigation/status bar style you are creating
I have two UITableViewControllers that are connected via a Show segue. The prompt property of UINavigationItem is set on both view controllers in Interface Builder. When the first view controller is shown, the prompt and navigation bar are both displayed properly, however, when performing a segue to the second view controller, the title and the back button animate undesirably. I have tried setting the prompts programmatically in the viewWillLayoutSubviews, viewDidLayoutSubviews, viewDidLoad, viewWillAppear:, and the viewDidAppear: methods of both view controllers, but I get the same effect.
Any ideas on how to resolve this issue? I don't want to resort to a custom view for the titleView because I prefer the stock functionality, but I am not able to figure out how to fix the undesirable animation.
Here is a video if the animation in question.
Well, it looks like this is an issue with the way that the UINavigationItem is laid out when showing the next view controller.
According to Catalina T. in an answer to a similar question, making two calls to set the hidden property of the navigation bar to true and then again to false in viewWillAppear: seems to get by this issue.
I'm trying to add UINavigationItem to my UIViewController as mentioned this answer. However the Navigation bar is not showing in my view. I tried even adding an outlet and setting the title programmatically and also adding the NavigationItem in two different places. Still it doesn't show. This view controller is embedded in a TabBarController. WHat am I missing here?
Thanks is advance.
This view controller is embedded in a TabBarController
But is it embedded, first and foremost, in a UINavigationController? If not, there will be no navigation bar that automatically appears and that automatically uses your view controller's navigation item.
If you don't want to use a UINavigationController (because you have no navigation to do), then you can add a navigation bar manually. But in that case your view controller's navigation item will not be used automatically to populate the navigation bar; you must populate it manually.
Typically, people do use a UINavigationController, even if there is no navigation to do, just to get this automatic behavior - to show the navigation bar and to populate it automatically.
[NOTE: The fact that you have told Interface Builder to show a navigation bar for this view controller, as if it were in a navigation controller, is irrelevant; that won't cause you to get any navigation bar when the app runs.]
I am wondering the following:
What is the best way to set up a searchbar that is available in all child view controllers of the navigation controller on the ipad (Hence in the entire application in my case).
A perfect example in which this is done is the IMDB application on the iPad, where each view controller with its presented views shows a search bar in the navigation bar that uses the same datasource.
I found the following post on this topic: Same UISearchBar for entire app?
However,I am not completely satisfied with the answer yet. I would like to know whether it is possible to show it in the navigation bar everywhere using either the function:
[self.navigationItem setTitleView:mySearchBar];
or:
[self.navigationItem setTitleView:mySearchBar];
searchDisplayController.displaysSearchBarInNavigationBar = YES;
at a specific location, hence not in each view controller. I thought of adding the search bar in the prepareforsegue function every time, but there must be a more convenient and nicer way.
Also, if you would suggest to work with container view controllers, how would this work with other navigation items? Can one adjust the size of the view UIsearchbar when more navigation bar items (buttons) are presented for a certain view controller?
In iPhone OS 3.0, you can set the toolbar items of a UINavigationController using the setToolbarItems:animated: method. However, this requires you pass in an array of UIToolbarItems. While I could programmatically create these toolbar items, I'd rather create them in Interface Builder if possible.
With this in mind, I have created a UIToolbar in "MyGreatViewController.xib" and have populated it with the wanted toolbar items. Then, in "MyGreatViewController.m", I get the items from the toolbar and pass them to setToolbarItems:animated::
- (void)viewDidLoad {
[super viewDidLoad];
[self setToolbarItems: [toolbar items]];
}
...where toolbar is an IBOutlet referring to the UIToolbar.
Is this a good approach? Is there a better way to accomplish this? Should I just create the items programmatically?
I don't know if this is documented anywhere, but I've found that in Interface Builder, if you enable the navigation controller's toolbar, you can drag bar items to your view controller, and they will automagically show up in the navigation controller's toolbar.
For example, here's what we can do (using Xcode 3.2 on Snow Leopard):
File->New Project.... Choose Navigation-based Application and create the project.
Open MainWindow.xib in Interface Builder.
Select the Navigation Controller, and in the Attributes inspector, check the "Shows Toolbar" box. This will cause a Toolbar object to appear.
Drag a Bar Button Item from the Library to the toolbar. It will appear in the toolbar. If you check the hierarchy in the NIB, you'll see that this new item is a child of the RootViewController.
It seems that any Bar Button Items added as children of the navigation item will show up in the navigation bar, and any Bar Button Items added as children of the view controller will show up in the toolbar.
(I stumbled on this by accident. If anyone can find documentation for this behavior, or any additional info, I'd like to hear about it.)
It's a perfectly acceptable way of doing it, but do bear in mind that loading xib files is quite expensive on the iPhone, and it may well be faster to create the toolbar items programatically in your viewDidLoad method.