In my application i want to add a viewcontroller with nib on top of tabbarviewcontroller using storyboard.
for eg; when the application launch for first time i want to show that view controller for once and after that when ever user start the application it should show the tabbarviewcontroller. and not the viewcontroller.
following is my code
-(void)viewDidAppear:(BOOL)animated
{
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"MainStoryboard" bundle:nil];
UIViewController *vc = [storyboard instantiateInitialViewController];
[vc setModalPresentationStyle:UIModalPresentationFullScreen];
[self presentModalViewController:vc animated:YES];
}
I'm a little confused with how you described what you want. There are a couple of ways to do what you want and depending on how you want things to flow.
Storyboard
If you stay in the storyboard, you can add a UIViewController - in front of your tabbar (to the left of) controller. Basically, add a UIViewController and move the start arrow to it. then create a segue from it to your tabbar controller. You can bring in the tabbar controller via a push segue or even as a modal segue if you want.
You would have to move your xib file into the storyboard.
It would flow like this: UIViewController -> UITabbarController -> Rest of your app.
In this model, the first view controller would always be available on launch.
Another strategy - trying to keep things simple is to use the first view controller attached to the tabbar. It would align with the left most tab.
That view controller gets instantiated and put on screen by the tabbar controller first under normal conditions. You can add code in that UIViewController in the ViewDidLoad or ViewDidAppear methods to instantiate and put up the modal view using either a storyboard or a nib file.
Finally, the last way I can think of would be to load the nib file from your app delegate then display your tabbar from the storybook as a modal. I think this approach is the least desirable, but doable.
hope that helps. good luck.
Related
My app's storyboard is using UIViewController's to go to different views of the app. However, I want to try a third party library, that is EGOPhotoViewer, not to reinvent the wheel. But how do I add UINavigationController to UIViewController from the storyboard? Here is the code this library is using to initialize.
EGOPhotoViewController *photoController = [[EGOPhotoViewController alloc] initWithPhotoSource:source];
[self.navigationController pushViewController:photoController animated:YES]
It only works for me when I add it as a view controller:
[self presentModalViewController:photoController animated:YES];
but the library works best within navigation controller because title bars and navigation buttons are missing from my testing approach.
In the storyboard
select your original viewController, then in the menu:
Editor -> embed in -> Navigation Controller (that viewController becomes the rootViewController)
Now you have various options to push your photoController eg:
From a UI widget in your rootViewController, CTRL-drag to photoController. That will create a segue which should work without extra code (although it helps to name the segue so that you can refer to it later in code)
or in code as you have in the question.
I am working on an iOS app and am having some difficulties. I am using storyboards and have placed a button which is connected modally to launch another view. The button works great. However, the button is really just a placeholder and in reality, I would like some code to launch the new view. I have tried several methods, all of which seemed straightforward but result in nothing happening. Is there a way to have my code activate the segue that my button currently activates?
I think #ctrahey 's solution should work. Try dragging the segue from the source view controller (not the button, but the vc that contains it) to the destination view controller and be sure to set it's type to modal.
I think sender == self vs. nil shouldn't matter in this case.
However, if that doesn't work, my usual practice for modal vcs is to not draw any segues to them in IB. Instead, I let the modal VC float in IB with no connections, giving it an "Identifier" on the attributes inspector. Then I use code like this:
// be sure to use the real name of your storyboard
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"MainStoryboard" bundle:nil];
// use the identifier you assigned to the modal vc
MyModalViewController *newVC = [storyboard instantiateViewControllerWithIdentifier:#"MyModalViewController"];
// presentingVC might be self, if this code is inside a vc
[presentingVC presentModalViewController:newVC animated:YES];
Give your segue an identifier (in the right-hand inspector panel), then in a view controller (from the same storyboard) do:
[self performSegueWithIdentifier:#"YourSeguesIdentifier" sender:self];
I am in the process of creating an application. In the main ViewController I have created the menu. But I want to have a login screen (UIView) to appear before the menu is visible.
But because the menu loads as soon as I run the application I have decided to create another UIView controller and have that loaded on top of the main ViewController.
Therefore at the end of my main ViewController viewDidLoad I have added the following code to open on top of that view the login view
LoginPageView *loginPageView = [[LoginPageView alloc] initWithNibName:#"LoginPageView" bundle:nil];
loginPageView.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
[self presentModalViewController:loginPageView animated:YES];
As I know the purpose of that code is to present another view, but unfortunately the login view does not appear. Only the main ViewController load.
Can anyone help me on that? Have you realised what exactly I want?
Thanks a lot
In the viewDidLoad method, the view exists, but there is no guarantee that the view is already part of the view hierarchy of your application. In fact, almost ain't.
What you can try is take that code in the viewWillAppear: or viewDidAppear:.
Make a UINavigationController. Use this as your window's root view controller. Set the UINavigationController to not show the navigation bar.
Set the navigation controller's child view controller to your login view controller.
When the user logs in successfully, create your main view controller and push it, like this:
MainViewController *mainVC = [[MainViewController alloc] initWithWhatever...];
[self.navigationController pushViewController:mainVC animated:YES];
When the user logs out, you can just do this to get back to the login VC:
[self.navigationController popViewControllerAnimated:YES];
I am working on my first iPhone app and making good progress. But there is one thing I just don't understand.
When my app starts it displays a UIView with some functionality on it. This works fine. One of the buttons on that screen is supposed to load a new view (HistoryViewController) which contains a navigation controller.
The problem is… whenever HistoryViewController is loaded the app crashes because there is no view. It's true because in the xib-File I can't connect the File's Owner's view to anything:
http://www.freeimagehosting.net/image.php?1a3caa8b8d.png
I definitely have a lack of knowledge somewhere but after hours of research I have not been able to solve this problem.
Any hints?
Thank you!
Normally you would either:
click on that bottom line (History Table View Controller, "HTVC") and in the inspector window specify a NIB Name - which means you would first have to make a new NIB.
or
doubleclick that bottom line (HTVC), so the 320x480 preview window pops up, and then drag in a UIView from the library.
Using the first method, you tell the view controller to dynamically load the NIB as the view to connect, and using the second method you do this for the view controller using IB. The view you drag in will then show up as a child of that bottom line (HTVC).
edit to actually load the nib file you created, do this to push the view controller:
UIViewController *controller = [[UIViewController alloc] autorelease];
[controller initWithNibName:#"nibfilename" bundle:nil];
[self.navigationController pushViewController:controller animated:YES];
substituting UIViewController for your own view controller class (if needed) and nibfilename with the filename of the nib (minus the extension!)
It's hard to tell what your problem is exactly, but I'll offer some advice.
When creating a navigation controller (or tab controller for that matter) in interface builder, its easy to not understand what is really happening, so my suggestion drop interface builder for a second and lets build it in code.
In general I really dislike building either UI Navigation Controller or tab view controller in interface builder, I really just rather build the views themselves and create the UINavigationController in code.
You have a view which shows the HistoryTableViewController which you want to be contained in a UINavigationController so the code to do this is:
- (void) showHistory
{
HistoryViewController *historyVC = [[HistoryViewController alloc] init];
// If you create historyviewcontroller in nib
// HistoryViewController *histroyVC [[HistoryViewController alloc] initWithNibName:#"myNib" bundle:nil];
UINavigationController *navController = [[UINavigationController alloc] initWithRootController:histroyViewController];
[self presentModalViewContoller:navController animated:YES];
}
This will create a nav controller showing your history view controller as the root view controller. Can't be easier.
I would like to show a Navigation Controller after clicking a button. Every tutorial assumes the navigation controller will be the first screen so it links it to the App Delegate, but App delegate only appears at MainWindow.xib.
How do you guys add a navigation controller to a view different than the MainWindow?
Thanks!
Here is some sample code to expand on Roger's answer. The following method is linked to some user interaction on the current view controller (to compose an email for example). This will give the compose view the navigation bar across the top instead of coding buttons inside your custom view.
-(void) composeButtonPushed: (id) sender {
ComposeViewController *controller = [[ComposeViewController alloc] initWithNibName:#"ComposeView" bundle:nil];
UINavigationController *composeNavController = [[UINavigationController alloc] initWithRootViewController:controller];
[self presentModalViewController:composeNavController animated:NO];
}
UINavigationController is to navigate a heirarchy of views with UIViewControllers. If you don't have a root UIViewController, it won't work (and doesn;t make sense). If you do have a UIViewController, you simply send a - (id)initWithRootViewController:(UIViewController *)rootViewController init message to a new navigation controller passing in your UIViewController.