In my app I have UINavigationController with two UIViewControler's (first and second). The first view controller contain UITableView. When a cell of table is touched the second view controller is pushed. What I want is to set custom text to back button at the second view. Here is the code in second view.
- (void)viewDidLoad
{
[super viewDidLoad];
self.navigationItem.leftBarButtonItem =
[[[UIBarButtonItem alloc] initWithTitle:#"Go back"
style:UIBarButtonItemStyleBordered
target:nil
action:nil] autorelease];
}
The problem is that the text of back button is changed but second view controller is not removed from the stack when the button is touched.
This has been already asked so many times:
The back button (self.navigationItem.backBarButtonItem) must be set instead of left button and not in the second controller, but in the first one (root).
The 'back' button applies to the controller doing the pushing. In this case, you would want to assign the custom back button in your 'first' UIViewController. When you push the second view controller, the back button will show the proper text
You are trying to set the propert of the leftbarbuttonitem.
To avail the default properties of back bar button, just use
self.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:#"Back" style:UIBarButtonItemStylePlain target:nil action:nil];
This would pop out the pushed view from the navigation controller and also enable you to go back to the last view.
Related
I can not find any way how to name my back button as a previos view controler. All my View Controlers are named.
This is what is happening to me:
Main Menu is rooted to navigation controler and 1.view is name set by user...
Please write me if you would need more info.
Thanks!
You can set the navigationItem title inside of your viewDidLoad or viewWillAppear:
self.navigationItem.title = #"MyViewTitle";
So when you go forward the back button will show the name of the previous view.
Edited
UIBarButtonItem *myBackButton =
[[UIBarButtonItem alloc] initWithTitle:#"SetBackButtonTitle"
style:UIBarButtonItemStyleBordered
target:nil
action:nil];
[[self navigationItem] setBackBarButtonItem:myBackButton];
I have a subclass of a UITableViewController, and I want to add a UINavBar to it. It is a very similar setup to the native contacts app, where you tap "add contact", and it presents a grouped tableview with a navbar at the top with a "cancel," and "done" option. The key is that I need it to present using a vertical transition (effectively with presentModalViewController:animated:yes), but I have tried using Interface Builder and adding it programmatically, and in both cases, the buttons do not respond, and the bar scrolls with the tableview, rather than staying at the top.
Thanks in advance,
HBhargava
It sounds like you're making the navigation bar a subview of the table view, that explains why the navigation bar scrolls with the table view.
Try this in the action method:
MyTableViewController *table = [MyTableViewController alloc] initWithStyle:UITableViewStyledGrouped];
UINavigationController *nav = [UINavigationController alloc] initWithRootViewController:table];
[self presentModalViewController:nav animated:YES];
Then in your table view controller's viewDidLoad:
UIBarButtonItem *doneButton = [UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:#selector(done:)];
self.navigationItem.rightBarButtonItem = doneButton;
i have a view controller, which is standalone and has two left UIBarButtonItem, however when i push it, i want to have these two buttons + the back button
i tried
- (void)viewDidLoad
{
[super viewDidLoad];
// back
if (self.navigationController.navigationItem.backBarButtonItem) {
self.navigationItem.leftBarButtonItems = [NSArray arrayWithObjects:self.navigationController.navigationItem.backBarButtonItem, self.barButtonFilter, self.barButtonFilterContacts, nil];
} else {
self.navigationItem.leftBarButtonItems = [NSArray arrayWithObjects:self.barButtonFilter, self.barButtonFilterContacts, nil];
}
}
if there is a back button, than add, else replace
but i didnt work
I am not able to get your problem but according to your caption you want to replace you back button of UINavigationController with a bar button item, in that case you simply need to have a custom button in place of back Button:
UIBarButtonItem *backButton= [[UIBarButtonItem alloc] initWithTitle:#"yourTitle" style:UIBarButtonItemStylePlain target:self action:#selector(someFunction:)];
self.navigationItem.rightBarButtonItem = backButton;
[backButtonrelease];
If this is not your problem please elaborate.
So the issue here is that a UINavigationBar can only have one leftButtonItem and one rightButtonItem. But What you can do is in the center of the UINavigationBar you can have a UIView. You can use this to place the buttons on.
Someone has the code here: adding-buttons-to-the-titleview-of-navigationbar-without-having-to-repeat-code
From Apple's iOS Human Interface Guidelines:
Use a toolbar instead of a navigation bar if you need to offer a
larger set of controls, or you do not need to enable navigation.
Avoid crowding a navigation bar with additional controls, even if
there appears to be enough space. The navigation bar should contain no
more than a view’s current title, the back button, and one control
that manages the view’s contents. If, instead, you use a segmented
control in the navigation bar, the bar should not display a title and
it should not contain any controls other than the segmented control.
http://developer.apple.com/library/ios/#documentation/userexperience/conceptual/mobilehig/UIElementGuidelines/UIElementGuidelines.html
I'm following the CoreDataRecipes app for modaly showing the add screen when I want to add a new item. However I cannot get the bar to display at the top so I can press 'Done' or 'Cancel'.
In the xib calling the modal controller I have the + button linked to modally sliding up the controller via IB.
I have the below in my modal controller
self.navigationItem.title = #"Add";
self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:#"Cancel" style:UIBarButtonItemStyleBordered target:self action:#selector(cancel)];
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:#"Save" style:UIBarButtonItemStyleDone target:self action:#selector(save)];
self.navigationController.navigationBarHidden = NO;
In my viewDidLoad
The modal controller displays fine except there is no bar so I cannot leave that screen.
You need to add it before the popover is actually presented.
Where you create the modal popover, you need to create it inside a UINavigationController first.
So, do the following.
PopoverView *foo = [[PopoverView alloc] initWithNibName:#"PopoverView" bundle:nil];
// Here you pass through properties if you need too.
// ...
UINavigationController *navC = [[UINavigationController alloc] initWithRootView:foo];
[foo release];
[self.navigationController presentModalViewController:navC animated:YES];
That will give the modal view the navigation bar which you're trying to edit.
Alternatively, you could maintain your storyboard segue. In Xcode, select the view controller you are trying to transition to and embed it in a navigation controller.
Now in the viewDidLoad of that view controller, add:
self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:#"Cancel" style:UIBarButtonItemStyleBordered target:self action:#selector(cancel)];
and lastly the callback:
- (void)cancel {
[self dismissModalViewControllerAnimated:YES];
}
Or if you just need the look of the bar, not exactly its functionality, you could drag the Navigation Bar (UINavigationBar) or Toolbar (UIToolbar) controll from the Media Library panel onto your view and go from there.
I had a similar predicament whereby I was loading a UITableViewController in a containerView. The containerView was inside a UIViewController which was being presented in a modal fashion.
I, like you, needed the navigation bar to have a title and a Done/Cancel button.
After overflowing the stack, I finally did this -
Dragged a UIView as the first item in the Table View in the IB. This automatically took a height of 44 pts and snapped to the top. It also shifted my first section downwards.
I dragged a UIButton (Done button) inside this view. Created an IBOutlet to it and called
[self dismissViewControllerAnimated:YES completion:nil];
Disclaimer:
1) This fake nav-bar will scroll along with the tableview.
2) This might not be a solution for what Bot has asked, but it's an option for others who might be looking for something similar.
I am using the following function via a notification to load a right button on my UINavigationBar, and even though I can trace out the button and verify it is allocated, it does not show up...any ideas?
EDIT 4/6/2011, 2:42PM
So, something interesting...the width always reports as 0.0...
- (void)showRightBarButton:(id)sender
{
NSLog(#"Showing button");
UIBarButtonItem *button = [[UIBarButtonItem alloc]
initWithBarButtonSystemItem:UIBarButtonSystemItemAdd
target:self
action:#selector(showPI:)];
[button setTitle:#"This Button"];
self.navigationItem.rightBarButtonItem = button;
//[[self.navigationItem rightBarButtonItem] setWidth:50];
NSLog(#"Button width is %f.", self.navigationItem.rightBarButtonItem.width);
[button release];
}
[self.view setNeedsDisplay];
You're right. That line isn't needed. As far as the rest of the code goes I don't see what's wrong with it. The only thing I've come up with so far is that self isn't the currently displayed view controller or that you're missing a navigation controller. Perhaps you've created your UINavigationBar yourself instead of using a navigation controller?
Anyway, for easier debugging I would suggest the following:
- (void)showRightBarButton:(id)sender
{
NSLog(#"Showing button");
UIBarButtonItem *button = [[UIBarButtonItem alloc]
initWithBarButtonSystemItem:UIBarButtonSystemItemAdd
target:self
action:#selector(showPI:)];
self.navigationItem.rightBarButtonItem = button;
[button release];
}
EDIT: The width isn't interesting. It's always 0.0 unless you specify it yourself.
The problem is that you're adding the button in the wrong place. You're not supposed to add the button to the navigation item of the navigation controller, but to the navigation item of the controller that is currently displayed by the navigation controller.
You say you're using an NSNotification to trigger the addition of the bar button item. Where are you registering for the notification? Is it possible that the notification is being received before your view is loaded?
If you're registering for notifications in -init you may want to set a flag on your view controller that you should be displaying the bar button item and then reference that flag in -viewDidLoad to optionally display it.
Or you could just register for the notification in -viewDidLoad.