I wonder if it's possible to add a button directly into a navigation controller, or I have to add button from all viewController pushed into navigation Controller?
Example: I have 3 UIViewController (VC1, VC2 and VC3) and I can push this elements in a NavigationController (NC). If I need to add a button as right navigation item for VC1 I can write in viewDidLoad of VC1 :
UIBarButtonItem *settingsBtn = [[UIBarButtonItem alloc]initWithTitle:#"Settings" style:UIBarButtonItemStyleBordered target:self action:#selector(settings)];
self.navigationItem.rightBarButtonItem = settingsBtn;
If I need this button on NC also for VC2 and VC3 I have to add this code in VC2 and VC3 too and specify method "settings" in VC1,VC2 and VC3
Is it possible to add this button in a shared way? And how can I define settings method as shared method ?
One way to do this is to have a parent class that your UIViewControllers derive from. In the parent class, you can set the button in, say, viewDidLoad. In your children classes, you would do [super viewDidLoad]; in your viewDidLoad method.
Hope this helps!
Become a delegate of the UINavigationController.
- (void)navigationController:(UINavigationController *)navigationController
willShowViewController:(UIViewController *)viewController
animated:(BOOL)animated {
UIBarButtonItem *settingsBtn = [[UIBarButtonItem alloc]initWithTitle:#"Settings"
style:UIBarButtonItemStyleBordered
target:self
action:#selector(settings)];
viewController.navigationItem.rightBarButtonItem = settingsBtn;
}
Related
I have NavigationViewController class and in viewDidload methods
like this. but Bar Buttons not showing any clue?
MapViewController *p=[[MapViewController alloc]initWithNibName:self.nibName bundle:[NSBundle mainBundle]];
UIBarButtonItem *rightButton = [[UIBarButtonItem alloc]
initWithTitle:#"Code"
style:UIBarButtonItemStylePlain
target:self
action:#selector(showDocco:)];
[[self navigationController] setNavigationBarHidden:NO animated:NO];
self.navigationItem.rightBarButtonItem = rightButton;
self.modalPresentationStyle=UIModalPresentationFormSheet;
[self pushViewController:p animated:YES];
Yiğit, if you want to show the bar button items in MapViewController then your code should be like as follows.
p.navigationItem.rightBarButtonItem = rightButton;
Lets say. you are in HomeViewContrller and you want to push MapViewController on button press.
Your code is setting your bar button item in your HomeViewController becuase you set there self.navigationItem.rightBarButtonItem = rightButton; in viewDidLoad method inside HomeViewController. it will access the navigation item of HomeViewController.
In short, each and every viewcontroller has its own navigation items. Either you should specify the barbutton item with particular viewcontroller reference as i showed you in my answer Or you can transfer your barbutton item code inside MapViewController viewDidLoad method.
Hope this helps
you have given nib name and do you have navigation controller in the nib?If you dont have navigation bar then add one toolbar and add the bar button item to navigaiton bar.
current version of my project :
I have 5 different UIViewControllers in my app. I've set my
FirstViewController to be the Initial View Controller using the
Attributes Inspector. I move back and forth from one ViewController to
another by using buttons to which I assign modal segues, from one
ViewController to another, using the StoryBoard
What I want to change:
I want to keep the navigation buttons obviously, delete the modal segues and use
a UINavigationController instead. If I understand the concept
correctly, when using a UINavigationController I need to go into each
UIButton-IBAction and at the very end of the method I have to push the next
ViewController I want to move to, onto my NavigationController (do I also
have to pop the current one first?). However, I can't figure out how
to implement all that correctly.
What I've done so far:
I removed all modal segues from the storyboard and kept the navigation buttons along with their corresponding IBActions
I unchecked the box in the Attributes Inspector that was making my FirstViewController the initial View Controller of my app
I went into my AppDelegate.m and tried to create the Navigation Controller there and make my FirstViewController be the RootViewController
MyAppDelegate.m
-(BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
UIViewController *myFirstViewController = [[FirstViewController alloc] init];
UINavigationController *myNavigationController = [[UINavigationController alloc] initWithRootViewController:myFirstViewController];
[myNavigationController pushViewController:myFirstViewController animated:YES];
// Override point for customization after application launch.
return YES;
}
I then tried to test if the above was working by going into the IBAction of a
navigation button on my FirstViewController and implemented the
following in order to move to my SecondViewController when the
button is pressed :
FirstViewController.m
- (IBAction)goRightButton:(UIButton *)sender
{
// some code drawing the ButtonIsPressed UIImageView on the current View Controller
UIViewController *mySecondViewController = [[SecondViewController alloc] init];
[self.navigationController pushViewController:mySecondViewController animated:YES];
}
but nothing happens. What am I doing wrong ?
You are not linking your XIB file. Please add your navigation controller as
UIViewController *myFirstViewController = [[FirstViewController alloc] initWithNibName:#"FirstViewController" bundle:nil];
navigationController = [[UINavigationController alloc] initWithRootViewController:myFirstViewController];
Use following code to move from one view to another
UIViewController *mySecondViewController = [[SecondViewController alloc] initWithNibName:#"SecondViewController" bundle:nil];
[self.navigationController pushViewController:mySecondViewController animated:YES];
If you are using a storyboard, you should just drag in the navigation controller there and hook it up to your app delegates. As long as it is the main storyboard, and you have identified a view controller to load first, you do not need to load any views in your app delegate.
In order to push a view programmatically that's in a storyboard, you need to do something like the following:
//bundle can be nil if in main bundle, which is default
UIStoryboard *mainStoryboard = [UIStoryboard storyboardWithName:#"MainStoryboard" bundle:nil];
MyCustomViewController *customVC = (MyCustomViewController *)[mainStoryboard instantiateViewControllerWithIdentifier:#"customVC"];
//standard way
[self.navigationController pushViewController:customVC animated:YES];
//custom animation
[UIView transitionWithView:self.navigationController.view duration:0.5 options:UIViewAnimationOptionTransitionCurlUp animations:^{
[self.navigationController pushViewController:customVC animated:NO];
} completion:nil];
You identify the view controller with the identifier you add in the storyboard editor. Below are some screenshots to help show what I mean.
In my UISplitViewController application, I have
RootViewController - view controller in the left pane.
DetailViewController - view controller in the right pane.
When one item (which is in a UITableView) in RootViewController is tapped, new view controller will be set as the following shows:
[detailViewController setViewControllers:[NSArray arrayWithObjects:newViewController, nil] animated:animated];
//detailPane is my DetailViewController
All works pretty well in landscape mode. However, I can't make the UISplitViewController work as what I want in portrait mode, that is, the RootViewController's popover button does not appear appropriately in my DetailViewController when I launch and use the application in portait mode.
When I launch the app in portrait mode, the popover button appears appropriately. But after tapping one item in the popover and a new view controller has been set on detailViewController, the button disappeared. I have to rotate the device to landscape and then back to portrait again to make the button appear again.
I set my UISplitViewController's delegate in my application's AppDelegate as follows:
self.splitViewController.delegate = self.detailViewController
And here is my UISplitViewControllerDelegate implementation
- (void)splitViewController: (UISplitViewController*)svc willHideViewController:(UIViewController *)aViewController withBarButtonItem:(UIBarButtonItem*)barButtonItem forPopoverController: (UIPopoverController*)pc {
NSLog(#"Will hide view controller");
barButtonItem.title = #"Menu";
[self.navigationItem setLeftBarButtonItem:barButtonItem];
self.popoverController = pc;
}
- (void)splitViewController: (UISplitViewController*)svc willShowViewController:(UIViewController *)aViewController invalidatingBarButtonItem:(UIBarButtonItem *)barButtonItem {
NSLog(#"Will show view controller")
NSMutableArray *items = [self.navigationItem.leftBarButtonItems mutableCopy];
[items removeAllObjects];
[self.navigationItem setLeftBarButtonItems:items animated:YES];
[items release];
self.popoverController = nil;
}
Any hint or help is greatly appreciated.
Thanks.
Just came up with a new solution.
Subclass UINavigationController and implement UISplitViewControllerDelegate. Set an instance of this class as the right ViewController of the splitViewController. Everytime you want to change the detail view controller from the master
NewDetailViewController *newDetailVC = ....// Obtain the new detail VC
newDetailVC.navigationItem.leftBarButtonItem = [[[[self.splitViewController.viewControllers objectAtIndex:1]topViewController]navigationItem ]leftBarButtonItem]; //With this you tet a pointer to the button from the first detail VC but from the new detail VC
[[self.navigationController.splitViewController.viewControllers objectAtIndex:1]setViewControllers:[NSArray arrayWithObject:newDetailVC]]; //Now you set the new detail VC as the only VC in the array of VCs of the subclassed navigation controller which is the right VC of the split view Controller
This works for me and I can avoid defining a hole protocol and setting the master as the delegate, which is a big trade off. Hope it helps.
If you still need it:
http://developer.apple.com/library/ios/#samplecode/MultipleDetailViews/Introduction/Intro.html
What I did to my source (I had similar setup to you) to fix it:
I have the master viewcontroller (UITableViewController in my case) be the delegate of the UISplitViewController. In the two delegate methods for UISplitViewControllers (so this would be in your master viewcontroller implementation) you would save the popupviewcontroller and the barbuttonitem in your class. Now, if you change your details viewcontroller, you do:
self.viewControllers = [NSArray arrayWithObjects:[self.viewControllers objectAtIndex:0], newDetailsViewController, nil];
UIViewController <SubstitutableDetailViewController>*vc = (UIViewController <SubstitutableDetailViewController>*)newDetailsViewController;
[vc invalidateRootPopoverButtonItem:_tableViewController.rootPopoverButtonItem];
[_createReportViewController showRootPopoverButtonItem:_tableViewController.rootPopoverButtonItem];
where we have
#protocol SubstitutableDetailViewController
- (void)showRootPopoverButtonItem:(UIBarButtonItem *)barButtonItem;
- (void)invalidateRootPopoverButtonItem:(UIBarButtonItem *)barButtonItem;
#end
the delegate that each of your detailsViewControllers should adhere to. You would implement like this:
- (void)showRootPopoverButtonItem:(UIBarButtonItem *)barButtonItem {
self.navigationItem.leftBarButtonItem = barButtonItem;
}
- (void)invalidateRootPopoverButtonItem:(UIBarButtonItem *)barButtonItem {
self.navigationItem.leftBarButtonItem = nil;
}
Let me know if this helps you.
I liked Nekto's solution, but it misses one key problem.
It's not clear what action: selector will cause the UISplitViewController to show the MasterViewController in a popover. When I finally figured this out, by examining the BarButtonItem in the debugger, I realized why it was so tricky to figure this out: the action: selector isn't documented anywhere in Apple's iOS SDK. Oops.
Try this:
UIBarButtonItem *showListView = [[UIBarButtonItem alloc] initWithTitle:#"List" style:UIBarButtonItemStyleBordered target:[self splitViewController] action:#selector(toggleMasterVisible:)];
[[detailViewController navigationItem] setLeftBarButtonItem:showListView];
You may want to surround this code with a conditional that checks the window is in in portrait mode, such as if ([self interfaceOrientation] == UIInterfaceOrientationPortrait)
When you are setting new view controllers placed on navigation stack, probably, all navigation buttons are reset. You can manually add appropriate buttons after changing navigation stack.
For example, you can pick code from - (void)splitViewController: (UISplitViewController*)svc willHideViewController:(UIViewController *)aViewController withBarButtonItem:(UIBarButtonItem*)barButtonItem forPopoverController: (UIPopoverController*)pc where default popover controller button is created:
UIBarButtonItem *item = [[UIBarButtonItem alloc] initWithTitle:#"Menu" style:UIBarButtonItemStyleBordered target:self action:#selector(appropriateSelector)];
[self.navigationItem setLeftBarButtonItem:barButtonItem];
self.popoverController = pc;
I have a UINavigationController setup in my AppDelegate:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Add the navigation controller's view to the window and display.
[self.window addSubview:navigationController.view];
[self.window makeKeyAndVisible];
return YES;
}
In my RootViewController I am pushing another view onto the stack:
//Show the deals
DealViewController *dvc = [[DealViewController alloc] initWithNibName:#"DealViewController" bundle:nil];
[self.navigationController.navigationBar setHidden:NO];
[self.navigationController pushViewController:dvc animated:YES];
The view shows up, but there is no back button that is added to my navigation bar. Why is this and how can I resolve it?
Are you setting self.title in RootViewController? Perhaps the UINavigationController doesn't have any text to put on the back button, so it omits it...?
Are you setting hidesBackButton = YES or backBarButtonItem = nil in DealViewController, or does it have a different leftBarButtonItem defined?
Try this:
DetailViewController *detailViewController = [[DetailViewController alloc] init];
UIBarButtonItem *back = [[UIBarButtonItem alloc] initWithTitle : #"Back"
style : UIBarButtonItemStyleDone
target : nil
action : nil];
self.navigationItem.backBarButtonItem = back;
[self.navigationController pushViewController : detailViewController animated : YES];
[detailViewController release];
You must think of the navigation controller as a stack of navigation controllers each controlling one screen full of information.
You instantiate the navigation controller with the
-(id)initWithRootViewController:(UIViewController *)rootViewController
method. You specify the root view controller in this call. Then you add the navigation controller's view as a subview to the window, like you did before.
If you want to show your second screen you push another view controller on the stack by using
-(void)pushViewController:detailViewController animated:YES
method.
Using presentModalViewController to show the naviagtionController. Set the navagitionController bar button like so:
[navigationController.navigationBar.topItem setLeftBarButtonItem:
[[[UIBarButtonItem alloc] initWithTitle: #"Back"
style: UIBarButtonItemStylePlain
target: self
action: #selector(dismisstheModal:)] autorelease]];
This happened to me because in my navigation controller's content controller I had set up some navigation controller behavior in viewDidLoad and in another class that inherits from my content controller, and the one that was being presented, i implemented a viewDidLoad as well, and forgot to call [super viewDidLoad] which thereby caused me to override the base class's viewDidLoad where I was setting up my navigation controller buttons. Oooops.
Is it possible to show toolbar items in a UIViewController inside a popover? I'm doing this in the viewDidLoad method of my view controller:
UIBarButtonItem *addButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:nil action:nil];
[self setToolbarItems:[NSArray arrayWithObject:addButton]];
[addButton release];
Then I'm wrapping this view controller in a UINavigationController (which has a toolbar property, and according to the docs, I'm supposed to use the setToolbarItems method of UIViewController to add items to the toolbar), then presenting it in a popover.
I do not see the toolbar. Are toolbars unsupported when using a popover?
Thanks
Figured it out, apparently the toolbar is hidden by default so you have to do this:
[self.navigationController setToolbarHidden:NO animated:NO];
To make it appear.