hi
i am currently working in iphone navigation based application. so my app have 30 screen,after navigating five screen i need a TabbbarController . I add tabbar Controller OverMy viewController ( [self.View addSubView:tab.View];) my application work fine and navigation work perfect but my problem is that after navigating from tabScreen to other myViewController which inside tabbbar controller are not relaods but navigated view controller work fine .
so above my code adding tabbar is wrong then plz help me ,thanks in advance.
I have to say, that I don't fully understand your question, I guess this is due to the language barrier, but maybe you can elaborate your explanation a little more. However, I think that I understood your problem. You want a UITabbarController (respectively it's view) to be a subview of a UINavigationController. Is that correct?
The answer to this question is simple, but, I'm afraid, unsatisfying your you: You can't do that and even if you could, you shouldn't. Please have a look at Apple's excellent ViewController guide. It says:
Thus, a navigation controller can incorporate custom view controllers, and a tab bar controller can incorporate both navigation controllers and custom view controllers. However, a navigation controller should not incorporate a tab bar controller as part of its navigation interface. The resulting interface would be confusing to users because the tab bar would not be consistently visible.
Related
Good day, needed some help. My Navigation bar can be seen in Story.board but not during runtime.
It was displaying well before I added an Embedded Tab Bar controller to the screen. Now I don't even know how to remove the Embeded Tab Bar controller.
Any help would be appreciated. :-)
(sorry my reputation too low and cannot post picture.)
If you are instantiating the view programmatically, make sure you instantiate the storyboard ID for the NavigationController and not the View Controller itself. That was my issue..
So I had exactly the same problem today and found that that it needs to be within a Navigation Controller in the story board hierarchy.
As well as this I found if you present something modally then this needs to be embed in another Navigation Controller too.
Hope this helps
I am a little bit confused about navigation controllers. In one navigation controller, a large amount of view controllers are present. I have seen so many examples with one navigation controller. Can we create multiple navigation controllers in iOS and in each navigation controller, can we define a number of view controllers? Is it possible? Please, someone explain this to me and give some real world examples if this is possible. Thanks in advance.
You should look at the sample programs in the Apple documentation. The Navigation controller is a stack which start at the app delegate level. You push view controllers into the stack and pop them out when you are done .... going back to the previous level. You can poptoroot which goes down to the lowest level just above the app delegate.
You have the option to have as many navigation controllers as you have Tabs in a Tab bar. it is not confusing ... Apple has a set of good examples that illustrate them ... Believe the sample about Elements is one.
I have the following structure in my app, is this a correct/valid way of doing it?
UINavigationController attached to the window, the rootcontroller in this navigationcontroller is a UIViewController that presents a tableview. When a user taps one of the rows a UITabBarController is pushed on the stack.
This works, however I began to be unsure when I read this:
Because the UITabBarController class
inherits from the UIViewController
class, tab bar controllers have their
own view that is accessible through
the view property. When deploying a
tab bar interface, you must install
this view as the root of your window.
Unlike other view controllers, a tab
bar interface should never be
installed as a child of another view
controller.
This is not recommended, but it should be OK. The aweful Wordpress app also does this. This depends on the design of your app.
I'm not shure about Apple's approval.
The reason why this is not recommended (and thus might not get approved - now or at a later point!) is user confusion.
Users are used to regard the tab bar as top-level navigation. So if dig down using the table and navigation, and then getting a UITabBar, this is horrible for navigation as the user doesn't know what to expect.
The solution here, of course depending on the use case, is a "switch" in the navigation bar or a toolbar. UISegmentedControl would be a natural choice.
I have an app where the appDelegate has a UITabBarController. Each of the tabs has a navigation controller which I currently use to push a single detail view onto the stack in each tab. I am hoping to replace my navigation controller on each of the tabs with a splitViewController. I use the Interface builder to provide the UINavigationController for each tab. I am having trouble loading a nib for each tab that has a UISplitViewController in it. I am getting an instance of the UITableViewController class displaying on the screen, but I am not getting the UISplitviewController or the Popover or the detail view etc. These classes are all working in a standalone app, but I am not able to get them into each of the tabs in one app. Although I am currently using the Interface Builder I am open to doing this programmatically. If someone has suggestions, or an example small project of a Tab based app with individual split views in the tabs I would appreciate it very much. (As this is my first question I am not sure how much code or other pictures from IB would be helpful for me to post. If you need further detail please let me know and I would gladly amend this post.)
Apple documentation
"The split view controller’s view should always be installed as the root view of your application window. You should never present a split view inside of a navigation or tab bar interface."
Moving on...
Not only shouldn't you -- if you do so, an error is thrown when you run. It's impossible.
I'm developing an iPhone application and I'm trying to do this:
I want an application with tree views. The view shown first, doesn't have a navigation bar. If the user tap on a button, I need to open the second view with a navigation bar and a table view. The user can also add new items to the table view. If the user do so, the application will show the third view where the user can add fields (this view has also a navigation bar).
It may seem simple, but for me it is not. I don't know how to use the UINavigationController and have not found yet a similar example for what I do (paragraph translated by google).
UPDATE
I don't know how where to put UINavigationController.
How can I do that? Can I use a UIViewController to call a UINavigationController?
Thank you.
take a look at the Recipes example (it also uses core data which may confuse things a little) http://developer.apple.com/iphone/library/samplecode/iPhoneCoreDataRecipes/Introduction/Intro.html#//apple_ref/doc/uid/DTS40008913
There is also a simpler starting point here http://developer.apple.com/iphone/library/samplecode/TableViewSuite/Introduction/Intro.html#//apple_ref/doc/uid/DTS40007318 but the Recipe example covers just about everything you need.
EDIT:added the following
For the very simplest example use XCode to build a new application - a navigation based application (sorry, I'm in front of a PC today so that is from memory). That will give you a blank application with the navigation controller created. You then use the navigation controller to push and pop your view controllers
ViewController Programming Guide