If I use the Empty template in Xcode, which just gives an app delegate and window, and I want to have a UITableView with navigation bar for drilling up and down, am I correct in assuming I should just do as below, create a UITableView subclass, instantiate it, then instantiate a navController, set the TableView as the navControllers root view and then add the navController as the root view of the Window?
It seems wrong to create a UITableViewController only to add this to another view controller subclass (UINavigationController).
Is this correct?
MyTableViewController *myTableViewController = [[MyTableViewController alloc] initWithNibName:#"MyTableViewController" bundle:nil];
UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:MyTableViewController];
[self.window setRootViewController:navController];
You are correct. That is how you use navigation controllers. They manage other view controllers. (http://developer.apple.com/library/ios/#documentation/WindowsViews/Conceptual/ViewControllerCatalog/Chapters/NavigationControllers.html#//apple_ref/doc/uid/TP40011313-CH2-SW27)
Yes it's correct. The navigation controller is a container whose purpose is to manage a stack of view controllers so it's very different to the table view controller. Try the master detail template and compare the differences.
You are correct. I'd also recommend you use a table view framework (such as the free Sensible TableView) to manage all your detail view controllers instead of you having to create them manually.
Related
Here is what code I get online, and it does work on previous project that I develop.But in this project, self.navigationController is null when I NSLog it, and guys online talked about add some code in delegate file, but I found nothing in previous project also I am not very clear what code should I add there. Anyone can give me a hand?
UIViewController *next = [[self storyboard] instantiateViewControllerWithIdentifier:#"ViewCollection"];
[self.navigationController pushViewController:next animated:YES];
If UINavigationController is nil, it means that the view controller that you use (which you instantiate from a Storyboard) is not actually embedded within a UINavigationController.
In order to embed it into a UINavigationController, you need to drag and drop a UINavigationController into your Storyboard and then ctrl-drag from the UINavigationController to your custom view controller and set it as the rootViewcontroller of the UINavigationController.
as nburk said: you need a NavigationController with a RootViewController which is your view. and dont forget to set the NavigationController as Initial View Controller. This all is done in the IB.
Please see the following attached image for more understanding.
The scenario is : I have five view controllers
Each view navigate to next viewController on push
Now the MidContainerViewController has got the Container which embeds the FirstViewController.
Bottom of MidContainerViewController is a static view which should not change while navigating further.
On navigation The FirstViewController should be of size equal to container
Also when I navigate to SecondViewController from FirstViewController, it should also be of size of Container.
Objective 1 : 'FirstViewController' and 'SecondViewController' should not take whole screen overlapping the bottomView image on MidContainerViewController.
Objective 2 : I must pop to root "View Controller" on last 'push' on SecondViewController.
Solutions :
1) Currently As I have embedding the root "View Controller" to navigationController. No problem with objective 2. It successfully navigates back to root. But can't achieve objective 1
2) If I embed the "First View Controller" too with navigationController the objective 1 is achieved but start facing problem for objective 2. It pop back till 'MidContainerViewController' only.
Any suggestion are highly appreciated.
Thanks,
Assuming your are manually handling push/pop events without using storyboard, I recommend you to not push the FirstViewController from MidContainerViewController. Add the next view controller as child view controller through following code:
FirstViewController *firstViewController = [[FirstViewController alloc] initWithNibName:#"FirstViewController" bundle:[NSBundle mainBundle]];
UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:firstViewController];
[self addChildViewController:navController];
[navController.view setFrame:CGRectMake(0.0f, 0.0f, _containerView.frame.size.width, _containerView.frame.size.height)];
[_containerView addSubview:navController.view];
[navController didMoveToParentViewController:self];
From the above code you'll achieve your first objective. In the above code, the FirstViewController gets initiated on its own separate navigation controller object, so it will have different navigation stack. So if you further push and pop from FirstViewController & SecondViewController, your view will not take the whole screen. But if you call popToRootViewController from last view controller, your root view controller would be FirstViewController in that specific container view.
To achieve second objective, you'll have to create a public property to contain reference of main navigation controller object in your AppDelegate class. Create your root view controller from that navigation controller object. In your last view controller, you'll then have to get reference of that navigation controller property from your AppDelagate class and then call popToRootViewController from that object.
i think you must present your root view controller from the secondView Controller rather that embedding to root view controller.
Thank you everyone.
The problem is solved and both the objectives are achieved.
I kept only one navigation controller as root view controller.
I created one customContainerViewController.
This class has instances of all the children it is supposed to show.
This class acts as delegate for each of its childViewController. Make customContainerViewController as deleagte of each childViewController.
I updated the chilren using delegation method and using UIView transition method in UIKit.
This worked for me.
I'm starting to learn iOS development and am attempting to use UINavigationController as my window's root view. All is working well but I need some advice on how to structure my app. I read the docs and some questions on here too.
Since the navigation controller is managing all my other content view controllers, then all of these view controllers need a way to send messages to the navigation controller. Right? So, I've thought about making a singleton navigation controller that any other view controller can call on to push new view controllers on it. Or, if each view controller has a reference to the navigation controller then they can push/pop easily as well. This is the part I'm not sure about.
Also, for having buttons and actions I have been setting the target as the navigation controller and from there it can handle it correctly and push or pop on it's own. I did subclass UINavigationController for this. And I have my view controllers as references in it. However I ran into an issue where my UITableViewController was handling a selection of a row and I need to push a new view controller on top, but how do I get the reference to the navigation controller?
I hope that makes sense, and any advice on how to structure this would be very appreciated.
Thanks!
I think you're overthinking this. View controllers have a navigationController property built in allowing you to reference the navigation controller. That being said, pushing to a new view controller from within a view controller that is embedded in a navigation controller is as easy as:
UIViewController *myNewViewController = [[UIViewController alloc] init];
[self.navigationController pushViewController:myNewViewController animated:YES];
According to your requirement you need to write like this :-
UIViewController *myNewViewController =
[[[UIViewController alloc]
initWithNibName:#"yourNibName"]
bundle:nil]];
[self.navigationController
pushViewController:myNewViewController
animated:YES];
This will push one controller on the bottom of the stack.
and how do you create it? - the popup one in the middle
I would lie to use something like this for my game (in the main menu).
There is no type for UIViewController. There are different ways how you can present UIViewController.
iPad support following three type:
Full Screen
Page Sheet
From Sheet
Your image is showing third one UIModalPresentationFormSheet.
You can Find detail of how to use this three type of presentation at following app guide:
Presenting View Controllers from Other View Controllers.
That's the link to the documentation.
Presenting View Controllers from Other View Controllers
A modal view controller is a controller that can be presented on top of another one.
To create it, for example, you can just call presentViewController:animated:completion: method of the current view controller, passing in the view controller you want to present.
Since the interface you have uploaded contains a navigation bar that contains a close bar button item, you can simply wrap the controller you want to present in a navigation controller.
YourViewController *yourViewController = [[YourViewController alloc] init];
UINavigationController *navigationController = [[UINavigationController alloc]
initWithRootViewController:yourViewController];
[self presentViewController:navigationController animated:YES completion: nil];
Otherwise, you can create a plain controller and use a UIToolBar.
Hope that helps.
P.S. The close button will not be there for free. You need to add it ;)
I think it would be much better to use a third party library instead of implementing it. There are many libraries that offer similar functionality.
UAModalPanel
MTPopupWindow
KGModal
If you do not want to use the above libraries, you can use UIModalPresentationFormSheet explained by Apple in this document: Presenting View Controllers from Other View Controllers
Hope this helps!
I'm running into trouble with what I think is a pretty basic task. Within peoplePickerNavigationController:peoplePicker:shouldContinueAfterSelectingPerson: i want to show my own view rather than the standard person view. I'm using a Storyboard, but don't think I can simply manually segue to a window here so I'm thinking I need to create a new XIB with a View Controller in it. I'm setting the Class of the View Controller to my custom View Controller in IB. Then in peoplePickerNavigationController:peoplePicker:shouldContinueAfterSelectingPerson: I'm doing:
MyVC *myVC = [[MyVc alloc] initWithNibName:#"XIBFileName" bundle:nil];
[self presentModalViewController:myVC animated:YES];
In my View Controller initWithNibName gets called, but not viewDidLoad. What am I doing wrong here?
Just try [peoplePickerVC presentModalViewController:myVC] instead of presenting from self.
The issue is that the peoplepickerviewcontroller will be in the top of the navigation stack. Becuase you wud've presented the peoplepicker from self. As this is the case, you wont be able to present/push from self as its not at the top of the navigation stack.
Otherwise once the peoplepicker has been poped, then you can further present from self.