I have the following:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath(NSIndexPath*)indexPath
{
audiChassisInputViewController = [[myAudiChassisInputViewController alloc] init];
[self.navigationController pushViewController:audiChassisInputViewController animated:YES];
self.navigationController.navigationBarHidden = NO;
UIBarButtonItem *retourButton = [[UIBarButtonItem alloc] initWithTitle:#"Retour" style:UIBarButtonItemStyleBordered target:self.navigationController action:#selector(popViewControllerAnimated:)];
[self.navigationController.navigationBar.topItem setLeftBarButtonItem:retourButton];
[self.navigationController.navigationBar.topItem setTitle:#"Chassis Input"];
[retourButton release];
[audiChassisInputViewController release];
}
and this workes...the new view is showed.
in the new view:
myAudiChassisInputViewController.h
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
chassisInputTextView.layer.cornerRadius = 15;
chassisInputTextView.clipsToBounds = YES;
[chassisInputTextView becomeFirstResponder];
UIBarButtonItem *okButton = [[UIBarButtonItem alloc] initWithTitle:#"OK" style:UIBarButtonItemStyleBordered target:self action:#selector(chassisOkPressed)];
[self.navigationController.navigationBar.topItem setRightBarButtonItem:okButton];
[okButton release];
}
I have no error, but there is no right bar button shown.Anyone, any idea why?
Change this line:
[self.navigationController.navigationBar.topItem setRightBarButtonItem:okButton];
with this line:
[[self navigationItem] setRightBarButtonItem:okButton];
The thing is, by the time viewDidLoad is executed, the top item of the navigation bar (self.navigationController.navigationBar.topItem) is still pointing to the navigation item of the back view controller.
The back view controller is the one that used to be the top view controller before the current top view controller was pushed onto the stack ([[viewControllers objectAtIndex:[viewControllers count] - 2] navigationItem]). The following snippet shows how the top item of the navigation bar is still pointing to the navigation item of the back view controller in viewDidLoad and it is for illustration purposes only:
// the view controllers currently on the navigation stack
NSArray *viewControllers = self.navigationController.viewControllers;
// The root view controller is at index 0 in the array, the back view controller is at index n-2, and the top controller is at index n-1, where n is the number of items in the array.
UIViewController *backViewController = [viewControllers objectAtIndex:[viewControllers count] - 2];
// get the navigation item of the back view controller
UINavigationItem *backNavigationItem = backViewController.navigationItem;
UINavigationItem *topItem = self.navigationController.navigationBar.topItem;
if (backNavigationItem == topItem) {
NSLog(#"This gets logged to the console");
}
Go to your
myAudiChassisInputViewController.m file
place following code
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
UIBarButtonItem *retourButton = [[UIBarButtonItem alloc] initWithTitle:#"Retour" style:UIBarButtonItemStyleBordered target:self.navigationController action:#selector(popViewControllerAnimated:)];
UIBarButtonItem *itemOkey=[[UIBarButtonItem alloc] initWithTitle:#"OK" style:UIBarButtonItemStyleBordered target:self action:#selector(chassisOkPressed)];
self.navigationItem.rightBarButtonItem=itemOkey;
self.navigationItem.leftBarButtonItem=retourButton;
}
I have the valid output as follows that you want to have
Hope it helps to you.
If you have xib file of your class, then add the navigation controller and add the navigation bar and under that add the UIBarButton.
Related
I have a navigation view controller which is a table view and then from the table view if i select a row it goes into detail view page. When i go to the detail view page i retrieve some information from the server and if the server does not respond then i get an alert view pop up which appears in front of my parent navigation view. now when press ok on the alert view and click on another row and it does go into my "didselectview" method but does not go to my detail view page. Would anyone know why? Code given below.
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
//Navigation logic may go here. Create and push another view controller.
Item *selectedItem = (Item *)[self.fetchedObjectsArray objectAtIndex:indexPath.row];
NSString * urlString = [CONST_FEED_DISCRIPTION_URL stringByAppendingString:selectedItem.guid];
NSDate * dateString = selectedItem.date;
JsonViewController *jsonViewController = [[JsonViewController alloc] initWithURLString:urlString date:dateString];
UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithTitle:#"Back"
style:UIBarButtonItemStyleBordered
target:nil
action:nil];
self.navigationItem.backBarButtonItem = backButton;
self.navigationController.navigationBar.tintColor = [UIColor colorWithHexString:CONST_NAVIGATIONBAR_COLOR];
[self.navigationController pushViewController:jsonViewController animated:YES];
[backButton release];
[jsonViewController release];
}
The first time around you get the alert view (which is an error message). After that nothing happens when u click on a row. but i know it goes into the method given below. would anyone know why? Does it have something to do with me pushing views? and not popping them?
Defer the push until the next runLoop, to let the tableView return:
dispatch_async(dispatch_get_main_queue(), ^ {
NSLog(#"Going to push...");
NSLog(#"...view Controller %#", jsonViewController);
[self.navigationController pushViewController:jsonViewController animated:YES];
[jsonViewController release];
NSLog(#"Just pushed %#", jsonViewController);
) );
Just to be clear, remove both these lines from the existing code:
[self.navigationController pushViewController:jsonViewController animated:YES];
[jsonViewController release];
I've a view controller having navigation bar in starting.
After some UIViewConrollers I have added a tabbar controller where I've created four tab bars and four view controllers for each tab bar.Now if I create tabbars with navigation bars related to each tab it shows two navigation bars at top, if create tabbars without navigation bar it will show only one tabbar but I am not able add title, corresponding to each tab view controller, to that navigation bar
Here is the code in which I created the tab bar
EventDetailViewController *firstViewController = [[EventDetailViewController alloc]init];
firstViewController.tabBarItem = [[[UITabBarItem alloc]initWithTitle:#"Home" image:[UIImage imageNamed:#"Multimedia-Icon-Off.png"] tag:2]autorelease]; MoreInfo *secondViewController = [[MoreInfo alloc]init];
secondViewController.tabBarItem = [[[UITabBarItem alloc]initWithTitle:#"Info" image:[UIImage imageNamed:#"Review-Icon-Off.png"] tag:0]autorelease];
PlaceInfoViewController *thirdViewController = [[PlaceInfoViewController alloc]init];
thirdViewController.tabBarItem = [[[UITabBarItem alloc]initWithTitle:#"Lugar" image:[UIImage imageNamed:#"Place-icon-OFF.png"] tag:1]autorelease];
FavoritesViewController *forthViewController = [[FavoritesViewController alloc]init];
forthViewController.tabBarItem = [[[UITabBarItem alloc]initWithTitle:#"Compartir" image:[UIImage imageNamed:#"Compartir-Icon-Off.png"] tag:3]autorelease];
UITabBarController *tabBarController = [[UITabBarController alloc] initWithNibName:nil bundle:nil];
tabBarController.viewControllers = [[NSArray alloc] initWithObjects:firstViewController, secondViewController, thirdViewController, forthViewController, nil];
tabBarController.view.frame = self.view.frame;
[self.view addSubview:tabBarController.view];
[firstViewController release];
[secondViewController release];
[thirdViewController release];
[forthViewController release];
You can obtain a reference to a view controller's navigationItem and set its title.
[[aViewController navigationItem] setTitle:#"My Title"];
Note that you'll want to embed all your view controllers in navigation controllers if you've not already done so. That way they'll actually get navigation bars with navigation items and you won't have to draw any of that yourself.
NSMutableArray *tabs = [NSMutableArray array];
UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:firstViewController];
[tabs addObject:nav];
nav = [[UINavigationController alloc] initWithRootViewController:secondViewController];
[tabs addObject:nav];
...
[tabBarController setViewControllers:tabs];
Edit: Your tab bar controller is inside a navigation controller, so you need to get a reference to the tab bar controller first. Try [[[self tabBarController] navigationItem] setTitle:...] in the viewDidLoad method of your view controllers.
Please go to the EventDetailViewController.m and define the below method.
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
self.title = NSLocalizedString(#"Catalogues", #"Catalogues");
//self.tabBarItem.image = [UIImage imageNamed:#"book"];
}
return self;
}
Hope it will work then in each viewController.m define the above initializer.
You cannot set title for tabbar control.You have to use UINavigationBar on every viewcontrollers
For UINavigationBar:
Drag Navigation bar to your xib/nib then add the title or do it programmatically
I got the solution myself by passing the reference of the navigation Item of the parent to the child view controller..thanx everyone for helping... :)
you cannot set the title of navigation bar . set the title of view or sub views in navigation.
self.title=#"welcome"; simply set the title.
So I have a root view with table view. I display the toolbar like this:
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
self.navigationController.toolbarHidden = NO;
}
And I implement the setToolbarItems method:
- (void)setToolbarItems:(NSArray *)toolbarItems animated:(BOOL)animated
{
UIBarButtonItem *buttonItem;
buttonItem = [[UIBarButtonItem alloc] initWithTitle:#"Hello" style:UIBarButtonItemStyleDone target:self action:#selector(goBack:)];
self.navigationController.toolbarItems = [ NSArray arrayWithObject: buttonItem ];
}
The result is an empty tolbar. Why?
From the docs:
toolbarItems
The toolbar items associated with the view controller.
#property(nonatomic, retain) NSArray *toolbarItems
Discussion
This property contains an array of UIBarButtonItem objects and works in >conjunction with a UINavigationController object. If this view controller is >embedded inside a navigation controller interface, and the navigation >controller displays a toolbar, this property identifies the items to display in >that toolbar.
You can set the value of this property explicitly or use the >setToolbarItems:animated: method to animate changes to the visible set of >toolbar items.
In other words, try accessing it through the actual view controller, not it's navigation controller like so:
self.toolbarItems = [ NSArray arrayWithObject: buttonItem ];
But who calls your implementation of setToolbarItems?
You're supposed to call setToolbarItems on your own view, not re-implement it. Then, the NavigationController will find them in the instance variable and render them.
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
self.navigationController.toolbarHidden = NO;
UIBarButtonItem *buttonItem;
buttonItem = [[UIBarButtonItem alloc] initWithTitle:#"Hello" style:UIBarButtonItemStyleDone target:self action:#selector(goBack:)];
[self setToolbarItems: [ NSArray arrayWithObject: buttonItem ]];
}
I have my app base on navigationController. So i set the toolbar visible for some views and for others i didnt calling setToolbarHidden:NO or YES.
first question, this goes in viewWillAppear method ?
Then in my appDelegate, I put one item on the toolbar but is not being show.
can someone show me how can I use delegate protocol here so each view know what to do when a item is pressed??
my code:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
//create itemViewcontroller
EventosViewController *itemsViewController = [[EventosViewController alloc] init];
//create UINavigationcontroller, stack only contains itemviewcontroller
navController=[[UINavigationController alloc] initWithRootViewController:itemsViewController];
//navController will retain itemviewcontroller, we can release it
[itemsViewController release];
UIBarButtonItem *systemItem1 = [[UIBarButtonItem alloc]
initWithBarButtonSystemItem:UIBarButtonSystemItemAdd
target:self
action:#selector(pressButton1:)];
//Use this to put space in between your toolbox buttons
UIBarButtonItem *flexItem = [[UIBarButtonItem alloc]
initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace
target:nil
action:nil];
//Add buttons to the array
NSArray *items = [NSArray arrayWithObjects: systemItem1, flexItem,nil];
//release buttons
[systemItem1 release];
[flexItem release];
//add array of buttons to toolbar
[navController.toolbar setItems:items animated:NO];
//set navController's view in window hierarchy
[[self window] setRootViewController:navController];
[navController release];
// Override point for customization after application launch.
[self.window makeKeyAndVisible];
return YES;
}
thx in advance!
The toolbar us hidden by default. The toolbarItems should be stored in the respective view controller, not the navigation controller.
From the documentation:
Displaying a Toolbar
In iOS 3.0 and later, navigation controller objects make it easy to provide a custom toolbar for each screen of a
navigation interface. The navigation controller object now manages an
optional toolbar in its view hierarchy. When displayed, this toolbar
obtains its current set of items from the toolbarItems property of the
active view controller. When the active view controller changes, the
navigation controller updates the toolbar items to match the new view
controller, animating the new items into position when appropriate.
The navigation toolbar is hidden by default but you can show it for
your navigation interface by calling the setToolbarHidden:animated:
method of your navigation controller object. If not all of your view
controllers support toolbar items, your delegate object can call this
method to toggle the visibility of the toolbar during subsequent push
and pop operations.
you can keep the toolbaritems like this
ThemeDetailViewController *themeDetail = [[ThemeDetailViewController alloc] init];
[self.navigationController pushViewController:themeDetail animated:YES];
themeDetail.toolbarItems = self.parentViewController.toolbarItems;
I want to build Grouped View in Modal View which is destination state from "+" button on the Navigation bar in main table view.
I have written this code:
-(void)viewDidLoad
{
//title
self.title = #"Set";
//addBtn
UIBarButtonItem *addBtn = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:#selector(toggleEditing)];
self.navigationItem.rightBarButtonItem = addBtn;
[addBtn release];
}
-(IBAction)toggleEditing
{
}
create a subclass of UITableViewController named MyTableViewController
use presentModalViewController:animated: in your current viewController
-(IBAction)toggleEditing {
MyTableViewController *tableViewController = [[[MyTableViewController alloc] initWithStyle:UITableViewStyleGrouped] autorelease];
[self presentModalViewController:tableViewController animated:YES];
}
And you will need a delegate method that tells the viewController from where you showed the modal viewcontroller that a row was selected.