In my viewDidLoad method I have the following:
navigBar = [[UINavigationBar alloc] initWithFrame:CGRectMake(0, 0, 320, 44)];
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:#"Back" style:UIBarButtonSystemItemAction target:self action:#selector(btnClicked:)];
[self.view addSubview:navigBar];
The button does not show up at all! What am I missing?
// create the navigation bar and add it to the view
UINavigationBar *navigationBar = [[UINavigationBar alloc] initWithFrame:CGRectMake(0, 0, 320, 44)];
[self.view addSubview:navigationBar];
// create a button
UIBarButtonItem *button = [[UIBarButtonItem alloc] initWithTitle:#"Back" style:UIBarButtonSystemItemAction target:self action:#selector(btnClicked:)];
// create a UINavigationItem and add the button in the right hand side
UINavigationItem *navItem = [[UINavigationItem alloc] initWithTitle:nil];
navItem.rightBarButtonItem = button;
// add the UINavigationItem to the navigation bar
[navigationBar pushNavigationItem:navItem animated:NO];
set button on navigation bar .then u create a BarButtonItem on navigation.
barbutton=[UIBarButtonItem alloc] ]initWithTitle......
navigation.navigationController.rightBarButton= barbutton;
First read this :
When you use a navigation bar as a standalone object, you are responsible for providing its contents. Unlike other types of views, you do not add subviews to a navigation bar directly. Instead, you use a navigation item (an instance of the UINavigationItem class) to specify what buttons or custom views you want displayed. A navigation item has properties for specifying views on the left, right, and center of the navigation bar and for specifying a custom prompt string.
A navigation bar manages a stack of UINavigationItem objects. Although the stack is there mostly to support navigation controllers, you can use it as well to implement your own custom navigation interface. The topmost item in the stack represents the navigation item whose contents are currently displayed by the navigation bar. You push new navigation items onto the stack using the pushNavigationItem:animated: method and pop items off the stack using the popNavigationItemAnimated: method. Both of these changes can be animated for the benefit of the user.
So basically what you need to do is :
[navigBar pushNavigationItem:self.navigationItem animated:NO];
Related
I have created one custom view and added a web view as subview of that custom view. And i have created one navigation bar in programmatically. Now i want to create one Left or Right navigation bar buttons in that view.
navigBar = [[UINavigationBar alloc] initWithFrame:CGRectMake(0, 0, 320, 44)];
navigBar.tintColor = [UIColor blackColor];
[self.view addSubview:navigBar];
UIBarButtonItem *homeButton = [[UIBarButtonItem alloc] initWithTitle:#"Home" style:UIBarButtonSystemItemAction target:self action:#selector(homeButtonAction)];
navigBar.rightBarButtonItem = homeButton; // it's not supports
How can i create navigation bar item in the custom navigation bar?, i want to remove the custom view. So please Help me out!
Thanks.
On your navigationbar reference you could invoke the two methods:
- (void)pushNavigationItem:(UINavigationItem *)item animated:(BOOL)animated
- (UINavigationItem *)popNavigationItemAnimated:(BOOL)animated
In your custom view controller class write something like this:
self.navigationItem.leftBarButtonItem = yourButton;
self.navigationItem.rightBarButtonItem = yourSecondButton;
So you could write something like this:
[myNavBarReference pushNavigationItem:self.navigationItem animated:NO];
rightBarButton is defined for UINavigationItem. See the documentation for the UINavigationItem and for the UINavigationBar (Specially Adding Content to a Navigation Bar).
The method to use is - (void)pushNavigationItem:(UINavigationItem *)item animated:(BOOL)animated
See http://developer.apple.com/library/ios/documentation/uikit/reference/UINavigationItem_Class/Reference/UINavigationItem.html
You would invoke methods to self.navigationItem.
I have a navigation toolbar in which I am adding toolbar items programatically, as below. The toolbar displays properly, and the toolbar style is set to black opaque. but the button on the toolbar does not display. Why?
//Set up the toolbar
[[[self navigationController] toolbar] setBarStyle:UIBarStyleBlackOpaque];
UIBarButtonItem *myButtonItem =
[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:#selector(handleMyButton)];
NSArray *myItems = [NSArray arrayWithObjects: myButtonItem,nil];
[[self navigationController] setToolbarItems:myItems animated:NO];
[myButtonItem release];
UINavigationController fetches the buttons that should be used for the navigation bar and the tool bar from the current visible view controller. This means that you add the buttons you want to have to the view controller, not the navigation controller. So it should work just fine if you do:
[self setToolbarItems:myItems animated:NO];
Compare that with how the add button is added to the navigation bar in the default template for a Navigation Based Application with Core Data:
self.navigationItem.rightBarButtonItem = addButton;
This means that when you push a new view controller the buttons in the tool bar will disappear and then appear again when you pop back.
You are referencing the toolbar owned by your navigationController in the first line and not in the 4th line. It would appear that the necessary fix is:
[[[self navigationController] toolbar] setToolbarItems:myItems animated:NO];
instead of your current line 4.
Show the toolbar by setting the toolbarHidden property of the navigation controller object to NO.
To assign buttons to the toolbar you would call this method
[toolbar setItems:];
Instead of
[[self navigationController] setToolbarItems: animated:];
my application has a UIViewController subclass which is being managed by a UINavigationController.
In the viewDidLoad of my UIViewController subclass, I was attempting to add a UIBarButtonItem to the toolbar like this:
settingsButton = [[UIBarButtonItem alloc] initWithTitle:#"Settings"
style:UIBarButtonItemStylePlain target:self action:#selector(viewSettings:)];
[self setToolbarItems:[NSArray arrayWithObject:settingsButton]];
this wasn't working out for me, so after some googling around, I tried this:
[[self navigationItem] setRightBarButtonItem:settingsButton];
which worked out fine. from reading the UIViewController documentation, I'm still confused about why setToolbarItems wasn't working. I verified in the debugger that the button was in the toolbarItems array in the viewDidAppear method. the button itself just wasn't appearing on my toolbar.
so, my question is, why didn't setToolbarItems work for me in the first code snippet?
I don't have the toolbar configured in my xib for this view controller at all, if that makes a difference.
Yes that make the difference.Whenever you see a bar on view by default for navigation based apps that is not a toolBar actually that is , navigation bar.so you can add item by referencing self.navigationItem.
[self setToolbarItems:[NSArray arrayWithObject:settingsButton]]; essentially populates the navigation controller's bottom toolbar - not the Left and Right top bar buttons.
The bottom toolbar is, by default, not displayed. To display it you must call [self.navigationController setToolbarHidden:NO]
Below is the relevant documentation - UINavigationController Class Reference
toolbar:
The custom toolbar associated with the navigation controller.
(read-only)
#property(nonatomic,readonly) UIToolbar *toolbar Discussion This
property contains a reference to the built-in toolbar managed by the
navigation controller. Access to this toolbar is provided solely for
clients that want to present an action sheet from the toolbar. You
should not modify the UIToolbar object directly.
Management of this toolbar’s contents is done through the custom view
controllers associated with this navigation controller. For each view
controller on the navigation stack, you can assign a custom set of
toolbar items using the setToolbarItems:animated: method of
UIViewController.
The visibility of this toolbar is controlled by the toolbarHidden
property. The toolbar also obeys the hidesBottomBarWhenPushed property
of the currently visible view controller and hides and shows itself
automatically as needed.
try to use
[toolbar setItems:[NSArray arrayWithObject:settingsButton] animated:YES];
instad of :
[self setToolbarItems:[NSArray arrayWithObject:settingsButton]];
shani
On ipad apps, you've got to set toolbar items to the "topViewController" (yes this is counter-intuitive).
UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:catView];
UIBarButtonItem *item1 = [[UIBarButtonItem alloc] initWithTitle:#"item 1" style:UIBarButtonItemStylePlain target:nil action:nil];
UIBarButtonItem *item2 = [[UIBarButtonItem alloc] initWithTitle:#"item 2" style:UIBarButtonItemStylePlain target:nil action:nil];
[nav setToolbarHidden:NO animated:YES];
// WRONG: [nav setToolbarItems:[NSArray arrayWithObjects:addButton, nil]];
// CORRECT (for ipad apps):
[nav.topViewController setToolbarItems:[NSArray arrayWithObjects:item1, item2, nil] animated:NO];
UIPopoverController *popover = [[UIPopoverController alloc] initWithContentViewController:nav];
Hey, I am trying to add bar button items to my UINavigationBar (nav bar) but I have found out that bar button items are not properties of navigation bar and hence can't be accessed directly like:
UIBarButtonItem *rightButton = [[UIBarButtonItem alloc] initWithTitle:#"Done"
style:UIBarButtonSystemItemDone target:nil action:nil];
navBar.rightBarButtonItem =rightButton;
I am creating my navigation bar programmatically.
Apparently, there is something called UINavigation Item that has to be dealt with to add bar buttons. Can anyone tell me how to go about this? How to create this UINavigation item programmatically and add this to my navBar and then add the bar buttons to it.
UINavigationBars shouldn't be used on their own, outside of a UINavigationController.
When a navigation controller is used, each view controller on the navigation stack has a UINavigationItem. It is this UINavigationItem that you can add bar button items to.
self.navigationItem.rightBarButtonItem = [[[UIBarButtonItem alloc] initWithTitle:#"Done"
style:UIBarButtonSystemItemDone
target:nil action:nil] autorelease];
I'm trying to either add 3 custom buttons to my navigation controller toolbar on the top of my view or add a segmented control with 3 options. I have the following code on my app delegate for when i create my view controller(fwc) but the buttons dont appear.
/*
Set up the navigation controller for the Feeding Tab
*/
// instantiate the feedingViewController and set the title to Feedings
feedingViewController *fwc =
[[feedingViewController alloc] initWithNibName:#"feedingViewController"
bundle:[NSBundle mainBundle]];
//fwc.title = #"Feedings";
// set the tab bar item up and add it as feedingViewController's tab bar item
UITabBarItem *feedingTabBarItem =
[[UITabBarItem alloc] initWithTitle:#"Feedings" image:nil tag:0];
fwc.tabBarItem = feedingTabBarItem;
[feedingTabBarItem release];
// create a new nav controller for feedings and add root view
feedingNavController = [[UINavigationController alloc] init];
//Create the add button, need to change the selector to something though *****
UIBarButtonItem *add = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd
target:self
action:#selector(newFeeding)];
//self.navigationItem.rightBarButtonItem = add;
UIBarButtonItem *flexibleSpaceButtonItem = [[UIBarButtonItem alloc]
initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace
target:nil action:nil];
// Create and configure the segmented control
UISegmentedControl *sortToggle = [[UISegmentedControl alloc]
initWithItems:[NSArray arrayWithObjects:#"Ascending",#"Descending", nil]];
sortToggle.segmentedControlStyle = UISegmentedControlStyleBar;
sortToggle.selectedSegmentIndex = 0;
[sortToggle addTarget:self action:#selector(toggleSorting:)forControlEvents:UIControlEventValueChanged];
// Create the bar button item for the segmented control
UIBarButtonItem *sortToggleButtonItem = [[UIBarButtonItem alloc]initWithCustomView:sortToggle];
[sortToggle release];
// Set our toolbar items
feedingNavController.toolbarItems = [NSArray arrayWithObjects:
flexibleSpaceButtonItem,
sortToggleButtonItem,
flexibleSpaceButtonItem,
add,
nil];
feedingNavController.navigationController.navigationBarHidden=NO;
[sortToggleButtonItem release];
[add release];
// Push the feedingViewController on the nav stack and release it.
[feedingNavController pushViewController:fwc animated:NO];
[fwc release];
In order to use a UITabBar you would need a UITabBarController, which is different than the UINavigationController. A UITabBar has a fundamentally different use than a UISegmentedControl. It appears that the functionality you're trying to implement is not appropriate for a UITabBar. In your question description you mention trying to add these buttons to the "navigation controller toolbar on the top." A UINavigationController has a UINavigationBar, which is the bar that runs across the top, and a UIToolbar, which is the bar that appears at the bottom. The UIToolbar, by default, is set to hidden, but you get a UIToolbar for free whenever you create a UINavigationController (see the UINavigationController reference in Xcode).
Apple's NavBar demo shows how to put a UISegmentedControl into the UINavigationBar. Instead of a title, use a custom titleView to display the segmented control:
fwc.navigationItem.titleView = sortToggle;
If you want to put your add UIBarButtonItem in the UINavigationBar as well, you can use:
fwc.navigationItem.rightBarButtonItem = add;
Note that you shouldn't actually go about trying to customize the UINavigationController's navigation bar on your own. The proper way to customize is to have an individual view controller access it's own navigationItem and set the titleView and rightBarButtonItem with the items you want.
If you wish to approach your problem using a UIToolBar instead, meaning that your items will appear on the bottom of the screen, you can do something like this:
// Assume UIBarButtonItem *add, UIBarButtonItem *sortToggleButtonItem,
// and UIBarButtonItem *flexibleSpaceButtonItem are allocated
[fwc setToolbarItems:[NSArray arrayWithObjects:
flexibleSpaceButtonItem,
sortToggleButtonItem,
flexibleSpaceButtonItem,
add,
nil]];
[feedingNavController setToolbarHidden:NO];