UINavigationController back and close button - iphone

I have a navigation controller. The controller works well and shows me the back button for go back to the window. But when I add this code for add the close button:
- (void)viewDidLoad
{
[super viewDidLoad];
UIBarButtonItem *doneButton = [[UIBarButtonItem alloc] initWithTitle:#"Chiudi"
style:UIBarButtonItemStylePlain target:self
action:#selector(dismissModalViewControllerAnimated:)];
self.navigationItem.rightBarButtonItem = doneButton;
[doneButton release];
}
...then the back button disappears, and I can only see the close button. Why?

THE PROBLEM was in
dismissModalViewControllerAnimated
I HAD TO USE
[self.navigationController dismissModalViewControllerAnimated:YES];
[self.navigationController popToRootViewControllerAnimated:NO];

Related

Adding UIButton top bar of a navigation controller that pushes to another viewController

I have a UIButton that pushes to another view controller using the following code. How do I go about putting this UIButton to the top bar of a navigation controller.
-(IBAction) nextButtonPressed {
TipsViewController *objYourViewController = [[TipsViewController alloc] initWithNibName:#"TipsViewController" bundle:nil];
[self.navigationController pushViewController:objYourViewController animated:YES];
[TipsViewController release];
}
I was thinking of adding something like: self.navigationItem.rightBarButtonItem somewhere, but can't figure out the syntax.
Here's something else I tried with the following code: I can get a "Next" button in the top bar of the Navigation Controller. How would I get it to push to another view controller?
UIBarButtonItem *anotherButton = [[UIBarButtonItem alloc] initWithTitle:#"Next" style:UIBarButtonItemStylePlain target:self pushViewController:anotherButton animated:YES];
self.navigationItem.rightBarButtonItem = anotherButton;
[anotherButton release];
thanks for any help.
When you init your UIBarButtonItem, do you see a parameter called action: ? Mention a selector there:
UIBarButtonItem *bar = [[UIBarButtonItem alloc] initWithTitle:#"Next" style:UIBarButtonItemStyleBordered target:self action:#selector(Next:)];
The above item should be your rightBarButton as you want it to be.
And this would be your selector:
-(void)Next:(id)sender {
[self.navigationController pushViewController:nextViewController animated:YES];
}
UIBarButtonItem addButton=[[UIBarButtonItem alloc]initWithTitle:#"+" style:UIBarButtonItemStyleBordered target:self action:#selector(method)];

Putting a back button inside of a Modal view pushed by another modal view

Check this, im pushing a modal view inside of another modal view. But, im trying to put a button inside of this modal view, but without luck.
What im doing wrong?
Thanks!
CadastroViewController *addController = [[CadastroViewController alloc] initWithNibName:#"CadastroViewController" bundle:nil];
// This is where you wrap the view up nicely in a navigation controller
UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:addController];
// You can even set the style of stuff before you show it
navigationController.navigationBar.barStyle = UIBarStyleBlackOpaque;
navigationController.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:#"OK" style:UIBarButtonItemStyleBordered target:self action:#selector(buy)];
// And now you want to present the view in a modal fashion all nice and animated
[self presentModalViewController:navigationController animated:YES];
// make sure you release your stuff
[navigationController release];
[addController release];
You'll have to add a new UINavigationItem to the navigationbar of the actual viewcontroller - NOT the navigation controller.
addController.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:#"OK" style:UIBarButtonItemStyleBordered target:self action:#selector(buy)];
You should add your button in a
-(void) viewDidLoad of your CadastroViewController controller class
This will look like this:
- (void) viewDidLoad
{
[super viewDidLoad];
UIBarButtonItem *button = [[UIBarButtonItem alloc] initWithTitle:#"OK" style:UIBarButtonItemStyleBordered target:self action:#selector(buy)];
self.navigationController. leftBarButtonItem = button;
[button release];
}
[self presentModalViewController: navigationController animated:YES]; is ok in your example, just all other initializations you should do in viewDidLoad
It seems to me, that the problem is here:
[self presentModalViewController: navigationController animated:YES];
Instead try do this:
[self presentModalViewController: addController animated:YES];

iPhone: How do I override the back button in a Navigation Controller?

In my app I have a basic Navigation Controller. For all of my views, except one, the controller works as it should.
However, for one view in particular, I would like the 'back' button to not go back to the previous view, but to go to one I set. In particular it is going to go back 2 views and skip over one.
After doing some research I found that I can intercept the view when it disappears, so I tried to put in code to have it navigate to the page I would like:
- (void)viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];
//i set a flag to know that the back button was pressed
if (viewPushed) {
viewPushed = NO;
} else {
// Here, you know that back button was pressed
mainMenu *mainViewController = [[mainMenu alloc] initWithNibName:#"mainMenu" bundle:nil];
[self.navigationController pushViewController:mainViewController animated:YES];
[mainViewController release];
}
}
That didn't work, so does anyone have any ideas?
Thanks!!
In your code, you seem to be trying to push another view controller onto the stack, rather than pop an extra item off it.
Try this as your code that does the going back two levels:
NSArray *vcs = [self.navigationController viewControllers];
[self.navigationController popToViewController:[vcs objectAtIndex:[vcs count]-3];
Alternatively you could totally replace the back button with a button of your own? In your viewController:
UIBarButtonItem *item = [[UIBarButtonItem alloc] initWithTitle:#"Back" style:UIBarButtonItemStyleBordered target:self action:#selector(doSomething:)];
self.navigationItem.hidesBackButton = YES;
self.navigationItem.leftBarButtonItem = item;
[item release];
Then you can write the doSomething: method to pop the two items off the stack, perhaps using the code I posted above.
Simple solution:
- (void)viewWillDisappear:(BOOL)animated {
//if true, back was pressed
if ([self.navigationController.viewControllers indexOfObject:self]==NSNotFound) {
//your logic
}
}
You can try implementing the UINavigationBarDelegate delegate. When the method -navigationBar:didPopItem: is called, you can pop an additional item from the UINavigationController, and thus pop two items at once.
UIButton *home = [UIButton buttonWithType:UIButtonTypeCustom];
UIImage *homeImage = [UIImage imageNamed:#"back.png"];
[home setBackgroundImage:homeImage forState:UIControlStateNormal];
[home addTarget:self action:#selector(LogOut)
forControlEvents:UIControlEventTouchUpInside];
home.frame = CGRectMake(0, 0, 69, 26);
UIBarButtonItem *button2 = [[UIBarButtonItem alloc] initWithCustomView:home];
[[self navigationItem] setLeftBarButtonItem:button2];
[button2 release];
button2 = nil;

right bar button not loading in navigation bar

I have the following code inside my #interface FriendsNavController : UINavigationController class implementation. The code is executed. I just don't know why it's not showing the button...
- (void)viewDidLoad {
UIBarButtonItem *button = [[UIBarButtonItem alloc] initWithTitle:#"Add Event" style:UIBarButtonItemStylePlain target:self action:#selector(refreshPropertyList)];
self.navigationItem.rightBarButtonItem = button;
[button release];
[super viewDidLoad];
}
EDIT: I think I misread your question. I set the navigationItem.rightBarButtonItem in the viewDidLoad of the controller that I push onto the navigation controller's stack, not in the viewDidLoad of the navigation controller. I think this is what you'll need to do as well.
Perhaps the call to [super viewDidLoad] is setting the navigation item's buttons back to the default (i.e., none). In my navigation-based app, I make the [super viewDidLoad] call before my code, like this:
- (void)viewDidLoad {
[super viewDidLoad];
UIBarButtonItem *button = [[UIBarButtonItem alloc] initWithTitle:#"Add Event" style:UIBarButtonItemStylePlain target:self action:#selector(refreshPropertyList)];
self.navigationItem.rightBarButtonItem = button;
[button release];
}
and the right button is appearing correctly.

button item lost when hide and unhide toolbar

i dont know, why the button are disappear after the toolbar set to hide and unhide.
how can i fix it?
setup a button code
-(void)viewDidAppear:(BOOL)animated {
//NSLog(#"viewDidAppear ");
[self becomeFirstResponder];
//Create a button
UIBarButtonItem *back = [[UIBarButtonItem alloc]
initWithBarButtonSystemItem:UIBarButtonSystemItemRewind
target:self action:#selector(goback:)];
UIBarButtonItem *fixspace1 = [[UIBarButtonItem alloc]
initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace
target:self action:nil];
UIBarButtonItem *next = [[UIBarButtonItem alloc]
initWithBarButtonSystemItem:UIBarButtonSystemItemFastForward
target:self action:#selector(gofwd:)];
UIBarButtonItem *stop = [[UIBarButtonItem alloc]
initWithBarButtonSystemItem:UIBarButtonSystemItemStop
target:self action:#selector(stopload:)];
UIBarButtonItem *refresh = [[UIBarButtonItem alloc]
initWithBarButtonSystemItem:UIBarButtonSystemItemRefresh
target:self action:#selector(refreshWeb:)];
[self.navigationController.toolbar setItems:[NSArray arrayWithObjects:fixspace1, back, fixspace1, stop, fixspace1, next, fixspace1, nil] animated:YES];
[self.navigationItem setRightBarButtonItem:refresh animated:YES];
[self.navigationController.view addSubview:self.navigationController.toolbar];
[stop release];
[next release];
[back release];
[refresh release];
[fixspace1 release];
}
and i setup my button at this method
-(void)viewDidAppear:(BOOL)animated
this code use for hide toolbar
[self.navigationController setNavigationBarHidden:YES animated:YES];
[[UIApplication sharedApplication] setStatusBarHidden:YES animated:YES];
[self.navigationController setToolbarHidden:YES animated:YES];
The documented method for setting toolbar items is via the toolbarItems property of the view controller. The same UINavigationController Reference also lists the toolbar property as read-only and specifically warns
You should not modify the UIToolbar
object directly.
Therefore, try changing
[self.navigationController.toolbar setItems:[NSArray arrayWithObjects:fixspace1, back, fixspace1, stop, fixspace1, next, fixspace1, nil] animated:YES];
to
[self setToolbarItems:[NSArray arrayWithObjects:fixspace1, back, fixspace1, stop, fixspace1, next, fixspace1, nil] animated:YES];
Seeing no better answers, I'll promote my earlier comment. Try taking out this line:
[self.navigationController.view addSubview:self.navigationController.toolbar];
I haven't experimented with anything like that but it looks wrong and very much against the iPhone SDK philosophy. If the controller object already has a pointer to the toolbar, why would you need to add it to the view? If that's the right place for it, the controller object would do that itself.
I doub't that you should release your toolbar buttons immediately after adding them to the toolbar. You should save them in instance variables and release them in your dealloc.