right bar button not loading in navigation bar - iphone

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.

Related

UINavigationController back and close button

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];

Setting a button in every navigation item of a UINavigationController

I know it is possible to add a custom button in a navigation item using this:
UIButton *infoButton = [UIButton buttonWithType:UIButtonTypeInfoLight];
[infoButton addTarget:self
action:#selector(showInfo:)
forControlEvents:UIControlEventTouchUpInside];
// Add the info button to the navigation bar
UIBarButtonItem *barButtonItem = [[UIBarButtonItem alloc] initWithCustomView:infoButton];
[self.navigationItem setRightBarButtonItem:barButtonItem
animated:YES];
[barButtonItem release];
But is there a way of setting this button in every subview pushed to the navigation stack without having to replicate this code?
Thanks!
You could also subclass UIViewController, then override:
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
UIButton *infoButton = [UIButton buttonWithType:UIButtonTypeInfoLight];
[infoButton addTarget:self action:#selector(showInfo:) forControlEvents:UIControlEventTouchUpInside];
// Add the info button to the navigation bar
UIBarButtonItem *barButtonItem = [[UIBarButtonItem alloc] initWithCustomView:infoButton];
[self.navigationItem setRightBarButtonItem:barButtonItem animated:YES];
[barButtonItem release];
}
return self;
}
then when you make a new VC, subclass this class instead of UIViewController
When pushing a "next" view controller you can add this code:
nextVC.navigationItem.rightBarButtonItem = [self.navigationItem.rightBarButtonItem copy];
But you have to overwrite the selector (if you want your button to send data to your nextViewController object):
[nextVC.navigationItem.rightBarButtonItem setTarget:nextVC ...];

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;

How to add a right button to a UINavigationController?

I am trying to add a refresh button to the top bar of a navigation controller with no success.
Here is the header:
#interface PropertyViewController : UINavigationController {
}
Here is how I am trying to add it:
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
if (self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]) {
UIBarButtonItem *anotherButton = [[UIBarButtonItem alloc] initWithTitle:#"Show" style:UIBarButtonItemStylePlain
target:self action:#selector(refreshPropertyList:)];
self.navigationItem.rightBarButtonItem = anotherButton;
}
return self;
}
Try doing it in viewDidLoad. Generally you should defer anything you can until that point anyway, when a UIViewController is inited it still might be quite a while before it displays, no point in doing work early and tying up memory.
- (void)viewDidLoad {
[super viewDidLoad];
UIBarButtonItem *anotherButton = [[UIBarButtonItem alloc] initWithTitle:#"Show" style:UIBarButtonItemStylePlain target:self action:#selector(refreshPropertyList:)];
self.navigationItem.rightBarButtonItem = anotherButton;
// exclude the following in ARC projects...
[anotherButton release];
}
As to why it isn't working currently, I can't say with 100% certainty without seeing more code, but a lot of stuff happens between init and the view loading, and you may be doing something that causes the navigationItem to reset in between.
Try adding the button to the navigationItem of the view controller that is going to be pushed onto this PropertyViewController class you have created.
That is:
MainViewController *vc = [[MainViewController alloc] initWithNibName:#"MainViewController" bundle:nil];
UIButton *infoButton = [UIButton buttonWithType:UIButtonTypeInfoLight];
[infoButton addTarget:self action:#selector(showInfo) forControlEvents:UIControlEventTouchUpInside];
vc.navigationItem.rightBarButtonItem = [[[UIBarButtonItem alloc] initWithCustomView:infoButton] autorelease];
PropertyViewController *navController = [[PropertyViewController alloc] initWithRootViewController:vc];
Now, this infoButton that has been created programatically will show up in the navigation bar. The idea is that the navigation controller picks up its display information (title, buttons, etc) from the UIViewController that it is about to display. You don't actually add buttons and such directly to the UINavigationController.
It seems that some people (like me) may come here looking for how to add a navigation bar button in the Interface Builder. The answer below shows how to do it.
Add a Navigation Controller to your Storyboard
Select your View Controller and then in the Xcode menu choose Editor > Embed In > Navigation Controller.
Alternatively, you could add a UINavigationBar from the Object Library.
Add a Bar Button Item
Drag a UIBarButtonItem from the Object Library to the top navigation bar.
It should look like this:
Set the Attributes
You could double-click "Item" to change the text to something like "Refresh", but there is an actual icon for Refresh that you can use. Just select the Attributes Inspector for the UIBarButtonItem and for System Item choose Refresh.
That will give you the default Refresh icon.
Add an IB Action
Control drag from the UIBarButtonItem to the View Controller to add an #IBAction.
class ViewController: UIViewController {
#IBAction func refreshBarButtonItemTap(sender: UIBarButtonItem) {
print("How refreshing!")
}
}
That's it.
There is a default system button for "Refresh":
- (void)viewDidLoad {
[super viewDidLoad];
UIBarButtonItem *refreshButton = [[[UIBarButtonItem alloc]
initWithBarButtonSystemItem:UIBarButtonSystemItemRefresh
target:self action:#selector(refreshClicked:)] autorelease];
self.navigationItem.rightBarButtonItem = refreshButton;
}
- (IBAction)refreshClicked:(id)sender {
}
You Can use this:
Objective-C
UIBarButtonItem *rightSideOptionButton = [[UIBarButtonItem alloc] initWithTitle:#"Right" style:UIBarButtonItemStylePlain target:self action:#selector(rightSideOptionButtonClicked:)];
self.navigationItem.rightBarButtonItem = rightSideOptionButton;
Swift
let rightSideOptionButton = UIBarButtonItem()
rightSideOptionButton.title = "Right"
self.navigationItem.rightBarButtonItem = rightSideOptionButton
-(void) viewWillAppear:(BOOL)animated
{
UIButton *btnRight = [UIButton buttonWithType:UIButtonTypeCustom];
[btnRight setFrame:CGRectMake(0, 0, 30, 44)];
[btnRight setImage:[UIImage imageNamed:#"image.png"] forState:UIControlStateNormal];
[btnRight addTarget:self action:#selector(saveData) forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem *barBtnRight = [[UIBarButtonItem alloc] initWithCustomView:btnRight];
[barBtnRight setTintColor:[UIColor whiteColor]];
[[[self tabBarController] navigationItem] setRightBarButtonItem:barBtnRight];
}
For swift 2 :
self.title = "Your Title"
var homeButton : UIBarButtonItem = UIBarButtonItem(title: "LeftButtonTitle", style: UIBarButtonItemStyle.Plain, target: self, action: Selector("yourMethod"))
var logButton : UIBarButtonItem = UIBarButtonItem(title: "RigthButtonTitle", style: UIBarButtonItemStyle.Plain, target: self, action: Selector("yourMethod"))
self.navigationItem.leftBarButtonItem = homeButton
self.navigationItem.rightBarButtonItem = logButton
You can try
self.navigationBar.topItem.rightBarButtonItem = anotherButton;
Here is the solution in Swift (set options as needed):
var optionButton = UIBarButtonItem()
optionButton.title = "Settings"
//optionButton.action = something (put your action here)
self.navigationItem.rightBarButtonItem = optionButton
Why are you subclasses UINavigationController? There is no need to subclass it if all you need to do is add a button to it.
Set up a hierarchy with a UINavigationController at the top, and then in your root view controller's viewDidLoad: method: set up the button and attach it to the navigation item by calling
[[self navigationItem] setRightBarButtonItem:myBarButtonItem];
Swift 4 :
override func viewDidLoad() {
super.viewDidLoad()
navigationItem.leftBarButtonItem = UIBarButtonItem(title: "tap me", style: .plain, target: self, action: #selector(onButtonTap))
}
#objc func onButtonTap() {
print("you tapped me !?")
}
UIView *view = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 110, 50)];
view.backgroundColor = [UIColor clearColor];
UIButton *settingsButton = [UIButton buttonWithType:UIButtonTypeCustom];
[settingsButton setImage:[UIImage imageNamed:#"settings_icon_png.png"] forState:UIControlStateNormal];
[settingsButton addTarget:self action:#selector(logOutClicked) forControlEvents:UIControlEventTouchUpInside];
[settingsButton setFrame:CGRectMake(40,5,32,32)];
[view addSubview:settingsButton];
UIButton *filterButton = [UIButton buttonWithType:UIButtonTypeCustom];
[filterButton setImage:[UIImage imageNamed:#"filter.png"] forState:UIControlStateNormal];
[filterButton addTarget:self action:#selector(openActionSheet) forControlEvents:UIControlEventTouchUpInside];
[filterButton setFrame:CGRectMake(80,5,32,32)];
[view addSubview:filterButton];
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:view];
Try this.It work for me.
Navigation bar and also added background image to right button.
UIBarButtonItem *Savebtn=[[UIBarButtonItem alloc]initWithImage:[[UIImage
imageNamed:#"bt_save.png"]imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal]
style:UIBarButtonItemStylePlain target:self action:#selector(SaveButtonClicked)];
self.navigationItem.rightBarButtonItem=Savebtn;
UIBarButtonItem *rightBarButtonItem = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:#selector(add:)];
self.navigationItem.rightBarButtonItem = rightBarButtonItem;
- (void)viewWillAppear:(BOOL)animated
{
[self setDetailViewNavigationBar];
}
-(void)setDetailViewNavigationBar
{
self.navigationController.navigationBar.tintColor = [UIColor purpleColor];
[self setNavigationBarRightButton];
[self setNavigationBarBackButton];
}
-(void)setNavigationBarBackButton// using custom button
{
UIBarButtonItem *leftButton = [[UIBarButtonItem alloc] initWithTitle:#" Back " style:UIBarButtonItemStylePlain target:self action:#selector(onClickLeftButton:)];
self.navigationItem.leftBarButtonItem = leftButton;
}
- (void)onClickLeftButton:(id)sender
{
NSLog(#"onClickLeftButton");
}
-(void)setNavigationBarRightButton
{
UIBarButtonItem *anotherButton = [[UIBarButtonItem alloc] initWithTitle:#"Show" style:UIBarButtonItemStylePlain target:self action:#selector(onClickrighttButton:)];
self.navigationItem.rightBarButtonItem = anotherButton;
}
- (void)onClickrighttButton:(id)sender
{
NSLog(#"onClickrighttButton");
}
self.navigationItem.rightBarButtonItem =[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemRefresh target:self action:#selector(refreshData)];
}
-(void)refreshData{
progressHud= [MBProgressHUD showHUDAddedTo:self.navigationController.view animated:YES];
[progressHud setLabelText:#"拼命加载中..."];
[self loadNetwork];
}
You should add your barButtonItem in - (void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated method.
Just copy and paste this Objective-C code.
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
[self addRightBarButtonItem];
}
- (void) addRightBarButtonItem {
UIButton *btnAddContact = [UIButton buttonWithType:UIButtonTypeContactAdd];
[btnAddContact addTarget:self action:#selector(addCustomerPressed:) forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem *barButton = [[UIBarButtonItem alloc] initWithCustomView:btnAddContact];
self.navigationItem.rightBarButtonItem = barButton;
}
#pragma mark - UIButton
- (IBAction)addCustomerPressed:(id)sender {
// Your right button pressed event
}
This issue can occur if we delete the view controller or try to add new view controller inside the interface builder(main.storyboard). To fix this issue, it requires to add "Navigation Item" inside new view controller. Sometimes it happens that we create new view controller screen and it does not connect to "Navigation Item" automatically.
Go to the main.storyboard.
Select that new view Controller.
Go to the document outline.
Check view Controller contents.
If new view controller does not have a Navigation item then, copy Navigation item from previous View Controller and paste it into the new view controller.
save and clean the project.
Also you are able to add multiple buttons using rightBarButtonItems
-(void)viewDidLoad{
UIBarButtonItem *button1 = [[UIBarButtonItem alloc] initWithTitle:#"button 1" style:UIBarButtonItemStylePlain target:self action:#selector(YOUR_METHOD1:)];
UIBarButtonItem *button2 = [[UIBarButtonItem alloc] initWithTitle:#"button 2" style:UIBarButtonItemStylePlain target:self action:#selector(YOUR_METHOD2:)];
self.navigationItem.rightBarButtonItems = #[button1, button2];
}
#Artilheiro : If its a navigationbased project, u can create BaseViewController. All other view will inherit this BaseView. In BaseView u can define generic methods to add right button or to change left button text.
ex:
#interface BaseController : UIViewController {
}
- (void) setBackButtonCaption:(NSString *)caption;
(void) setRightButtonCaption:(NSString *)caption selectot:(SEL )selector;
#end
// In BaseView.M
(void) setBackButtonCaption:(NSString *)caption
{
UIBarButtonItem *backButton =[[UIBarButtonItem alloc] init];
backButton.title= caption;
self.navigationItem.backBarButtonItem = backButton;
[backButton release];
}
- (void) setRightButtonCaption:(NSString *)caption selectot:(SEL )selector
{
UIBarButtonItem *rightButton = [[UIBarButtonItem alloc] init];
rightButton.title = caption;
rightButton.target= self;
[rightButton setAction:selector];
self.navigationItem.rightBarButtonItem= rightButton;
[rightButton release];
}
And now in any custom view, implement this base view call the methods:
#interface LoginView : BaseController {
In some method call base method as:
SEL sel= #selector(switchToForgotPIN);
[super setRightButtonCaption:#"Forgot PIN" selectot:sel];

How can I show a custom image in navigation bar back button instead of default buttons which are shown by nav bar itself

On navigating to any view in an app which has navigation controller implemented, it shows a back button to go to the previous view. Is there a way I can use custom image instead of the default one?
Yes you can.
You can control how the standard back button will look when another view controller is pushed on top of a given view controller by setting its navigation item's back bar button item (you can customize the title or use an image):
UIBarButtonItem *btn = [[UIBarButtonItem alloc] initWithTitle:#"Back" style:UIBarButtonItemStyleBordered target:nil action:nil];
self.navigationItem.backBarButtonItem = btn;
[btn release];
UIBarButtonItem *btn = [[UIBarButtonItem alloc] initWithImage:yourImage style:UIBarButtonItemStyleBordered target:nil action:nil];
self.navigationItem.backBarButtonItem = btn;
[btn release];
Note: you configure this in a "parent" view controller that may have other view controller(s) pushed on top of it. The configuration is done in the "parent" and the appearance of the back button is changed when some view controller is on top. Tapping the back button brings you back as expected.
You can also create your own UIBarButtonItem and set it as the leftButtonItem on the navigation bar on the current view controller:
UIBarButtonItem *btn = [[UIBarButtonItem alloc] initWithImage:yourImage style:UIBarButtonItemStyleBordered target:self action:#selector(yourMethod:)];
self.navigationItem.leftBarButtonItem = btn;
[btn release];
Note: in this case, the back / left bar button item is changed for the current view controller (when it is on top). You must implement the yourMethod: method. If you simply want the button to go back, you have to handle popping the view controller yourself by calling [self.navigationController popViewControllerAnimated:YES];.
I found that none of the solutions actually solved the BACK UIBarButton and also provided its hidden behavior if the view controller is root.
-(void)popViewControllerWithAnimation {
[self.navigationController popViewControllerAnimated:YES];
}
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
if([self.navigationController.viewControllers objectAtIndex:0] != self)
{
UIButton *backButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 26, 26)];
[backButton setImage:[UIImage imageNamed:#"back"] forState:UIControlStateNormal];
[backButton setShowsTouchWhenHighlighted:TRUE];
[backButton addTarget:self action:#selector(popViewControllerWithAnimation) forControlEvents:UIControlEventTouchDown];
UIBarButtonItem *barBackItem = [[UIBarButtonItem alloc] initWithCustomView:backButton];
self.navigationItem.hidesBackButton = TRUE;
self.navigationItem.leftBarButtonItem = barBackItem;
}
}
It almost works like a back button. With the exception of the transition animation (after the button is tapped and current view is popped off the navigation to the right).
The right way is to make a category.
#interface UINavigationBar (MyNavigationBar)
-(void)drawRect:(CGRect)rect;
#end
#implementation UINavigationBar (MyNavigationBar)
-(void)drawRect:(CGRect)rect {
UIImage *image = [UIImage imageNamed:#"....."];
[image drawInRect:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)];