I try this code for the navigation bar
UINavigationBar *navbar = [[UINavigationBar alloc]initWithFrame:CGRectMake(0, 0,320, 70)];
and for the button I tried this code
UIBarButtonItem *add=[[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:#selector(SaveButtonClicked:)];
self.navigationItem.rightBarButtonItem=add;
after this code i declare SaveButtonClicked method also.
When I try this code there is no error in this code and compiled successfully but the button is not show in the navigation bar.
Help me with right code and suggestions.
After you have created navigation bar
UINavigationBar *navbar = [[UINavigationBar alloc]initWithFrame:CGRectMake(0, 0,320, 70)];
Then You need to create navigation item. and add navigation item to navigation bar
UINavigationItem *item = [[UINavigationItem alloc]init];
UIBarButtonItem *add=[[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:#selector(SaveButtonClicked:)];
item.rightBarButtonItem=add;
navbar.items = [NSArray arrayWithObjects:item, nil];
[self.view addSubview:navbar];
Hope this Helps!
1) You don't need to create a UINavigationBar. The navigation controller you're in provides that.
2) And if you did think you needed one, that probably means your view isn't in a navigation controller at all. Check what the value of self.navigationItem is. I imagine you'll find it to be nil. That means you need to redo your interface so this view is actually inside a navigation controller. "Embed in Navigation Controller" under "Editor" in Interface Builder may be of assistance there.
you can just use this single line to achieve that:
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc]initWithTitle:#"Save" style:UIBarButtonItemStylePlain target:self action:#selector(saveButtonClicked:)];
after this add this method
-(void)saveButtonClicked:(UIBarButtonItem *)sender{
}
for more you can refer Add button to navigationbar programmatically
Related
I've created my toolBar and navigationBar and added the respective items to it. I'm still new to coding but its my understanding that UINavigationController only displays the navBar and toolBar for the viewController in the top of the seque. I'm doing this without storyboards and in swift.
If you want to add more than one bar button items to UINavigationBar programatically, you can do that like
UIBarButtonItem *btnShare = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAction target:self action:#selector(share)];
UIBarButtonItem *btnRefresh = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemRefresh target:self action:#selector(refresh)];
[self.navigationItem setRightBarButtonItems:[NSArray arrayWithObjects:btnShare, btnRefresh, nil]];
Hope this will help you.
Trying to customize my back button in a drilldown navigation controller.
On my one view controller I have an Add button where the code programatically generates a new UIViewController:
- (void)add:(id)sender
{
MyAddViewController *addController = [[MyAddViewController alloc] initWithNibName:#"MyAddViewController" bundle:nil];
[self.navigationController pushViewController:addController animated:YES];
[addController release];
}
This works and when I click the add button it drills down into the new view. Inside the viewDidLoad method of MyAddViewController.m I have:
self.navigationItem.backBarButtonItem = [[[UIBarButtonItem alloc] initWithTitle:#"Back" style:UIBarButtonItemStylePlain target:nil action:nil] autorelease];
But this isn't working. The back button in the navigation controller remains the title of the previous view's controller on the stack. It seems that line does nothing. Did I miss something?
Thanks
self.navigationItem.backBarButtonItem is for the back button that appears on the view pushed by the view controller. So you need to move that line to the previous view controller.
This will only work on each child after the viewController that has self.navigationItem.backBarButtonItem.
You're confusing the backBarButtonItem and the leftBarButtonItem. From the UINavigationItem docs on backBarButtonItem:
When this item is the back item of the
navigation bar—when it is the next
item below the top item—it may be
represented as a back button on the
navigation bar. Use this property to
specify the back button. The target
and action of the back bar button item
you set should be nil. The default
value is a bar button item displaying
the navigation item’s title.
So, if you were to change:
self.navigationItem.backBarButtonItem = [[[UIBarButtonItem alloc] initWithTitle:#"Back" style:UIBarButtonItemStylePlain target:nil action:nil] autorelease];
To:
self.navigationItem.leftBarButtonItem = [[[UIBarButtonItem alloc] initWithTitle:#"Back" style:UIBarButtonItemStylePlain target:nil action:nil] autorelease];
I believe you would get the desired effect.
You can't replace the backBarButtonItem, but you can use the leftBarButtonItem to override it. But to get the new button to perform operate the same as the back button, you do need to set the target and action of the new button something like:
- (void)dismissMyView {
[self.navigationController popViewControllerAnimated:YES];
}
- (void)viewDidLoad {
[super viewDidLoad];
self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc]
initWithTitle:#"Quit" style: UIBarButtonItemStyleBordered
target:self action:#selector(dismissMyView)];
}
If ViewController A push ViewController B meanwhile we want to set the back bar button tittle, we should set "self.navigationItem.backBarButtonItem = ..".if it was set in ViewController B, it will not work as we want.
I am currently trying to add a navigation bar for every screen. However I want to programmatically add different types of buttons available on different screens, specifically on the different slide drawer menu items. Also, I want to be able to have a back button for nested screens.
I have read about the navigation controller and I see there is just a navigation bar that I can add to my xib file, but not sure how to implement it exactly. If I add a navigation bar to the xib file do I have to reference it somehow in my controller or should adding it be enough, because adding this line does not add the items to the navigation bar.
This is the code I add in my MainViewController.m file:
//add navigation top bar items
UIBarButtonItem *shareItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAction target:self action:nil];
UIBarButtonItem *cameraItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCamera target:self action:nil];
NSArray *actionButtonItems = #[shareItem, cameraItem];
self.navigationItem.rightBarButtonItems = actionButtonItems;
Where ever you initially create your MainViewController (and most likely assign it to the windows rootViewController property) wrap this in a UINavigationController.
MainViewController *mainViewController = [MainViewController new];
self.window.rootViewController = [[UINavigationController alloc] initWithRootViewController:mainViewController];
You code in your question is then correct, and those UIBarButtonItems will then show in the navigation bar.
I dropped in a UINavigationBar in UIInterfaceBuilder. I present this view modally and just want a UIBackBarButton to return to my last view. I have an outlet and property to this UINavigationBar declared. I thought in my viewDidLoad method, I could create a UIBackButton like this:
UIBarButtonItem *backButton =
[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonItemStyleBordered
target:self
action:#selector(goBack)];
self.navigationItem.backBarButtonItem = backButton;
[backButton release];
But I do not see my UIBackBarButtonItem on the UINavigationBar. I think I am doing something wrong here since I don't think my UINavigationBar knows I'm trying to add this UIBackBarButtonItem to it in this way. Would I have to do create an NSArray, put the button in it, and setItems for the NavigationBar instead?
I'm confused on how the navigationItem property works vs the setItems of the UINavigationBar as well. Any help would be appreciated. Thanks!
You are trying to set the Back Button Item in a modal view which doesn't add a backBarButtonItem. This what causes the Button (or any sort of back button for that matter) not to show. The backBarButtonItem is mainly for use with Pushed View Controllers which have a Back Button added from the parent (next item below) when you push a new view controller (top item). The Apple UINavigationItem Documentation says:
When this item is the back item of the navigation bar—when it is the next item below the top item—it may be represented as a back button on the navigation bar. Use this property to specify the back button. The target and action of the back bar button item you set should be nil. The default value is a bar button item displaying the navigation item’s title.
To get the Back Button on the left side like you wish, Try changing
self.navigationItem.backBarButtonItem = backButton;
to
self.navigationItem.leftBarButtonItem = backButton;
making a call such as this from a view controller
{
NextViewController* vcRootView = [[NextViewController alloc] initWithNibName:#"NextView" bundle:[NSBundle mainBundle]];
UINavigationController* navController = [[UINavigationController alloc] initWithRootViewController:vcRootView];
[vcRootView release];
[self.navigationController presentModalViewController:navController animated:YES];
[navController release];
}
will present NextViewController as a Modal view on the calling view and NextViewController will have a navigationController for it.
In The NextViewController implementation file all you need is this
- (void)viewDidLoad {
[super viewDidLoad];
UIBarButtonItem* backButton = [[UIBarButtonItem alloc] initWithTitle:#"Back" style:UIBarButtonItemStylePlain target:self
action:#selector(barButtonBackPressed:)];
self.navigationItem.leftBarButtonItem = backButton;
[backButton release];
}
-(void)barButtonBackPressed:(id)sender{
[self dismissModalViewControllerAnimated:YES];
}
to have the back button to dismiss the modalview. Hope it helps.
Use below code snippet :
//Add button to NavigationController
UIBarButtonItem *backButton =
[[UIBarButtonItem alloc] initWithTitle:NSLocalizedString(#“back”, #"")
style:UIBarButtonItemStylePlain
target:self
action:#selector(goBack)];
self.navigationItem.leftBarButtonItem = backButton;
//Perform action on back Button
- (void) goBack { // Go back task over-here
}
Different style types available are :
UIBarButtonItemStylePlain, UIBarButtonItemStyleBordered, UIBarButtonItemStyleDone
You may use this setters without creation new UIBarButtonItem:
[self.navigationItem.leftBarButtonItem setAction:#selector(doBackButton:)];
[self.navigationItem.leftBarButtonItem setTarget:self];
On an iPad application, I want to be able to have multiple buttons in the top bar of a popover. I'm launching it like this:
UINavigationController *nc = [[UINavigationController alloc] initWithRootViewController:vc];
pop = [[UIPopoverController alloc] initWithContentViewController:nc];
[pop presentPopoverFromRect:CGRectInset([tableView rectForRowAtIndexPath:indexPath], 10, 10)
inView:tableView
permittedArrowDirections:UIPopoverArrowDirectionAny
animated:YES];
pop.delegate = self;
[nc release];
In the viewDidLoad I want to set the titleView to contain multiple UIBarButtonItems. This is ok on a normal UINavigationController but I need to be able to do this and keep the custom style of the navigation bar on the popover.
I have tried setting the rightBarButtonItem to have a toolbar that contains buttons, but they take the format of the toolbar, which itself will not take the format/style of the popover.
It's a bit hackish, but you can create a truly transparent UIToolbar by subclassing and overriding drawRect: with an empty method. This will still draw the UIBarButtonItems on the toolbar, but not the toolbar itself.
Then, as Nils describes, you can create a bar button item out of the custom toolbar instance and add it as the rightBarButtonItem.
Why you don't use a custom UIView with a UIToolbar or UINavigationBar instead of UIPopoverController?
The effect, is the same!
First you need to set a delegate to the UINavigationController and then implement the nabigationController:willShowViewController:animated: method. In this method you can adjust the left and right bar button items.
- (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated{
viewController.navigationItem.leftBarButtonItem = [[[UIBarButtonItem alloc]
initWithTitle:#"Image Source"
style:UIBarButtonItemStylePlain
target:self
action:#selector(cancelPressed)] autorelease];
}
I had the same problem, and here is what I did :
UIBarButtonItem *uiBarRefresh = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemRefresh target:self action:#selector(forcerefresh)];
UIBarButtonItem *uiBarCurl = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemPageCurl target:self action:#selector(showlist)];
UIToolbar_transparent* tools = [[UIToolbar_transparent alloc] initWithFrame:CGRectMake(0, 0, 133, 44.01)];
tools.barStyle = UIBarStyleBlackTranslucent;
tools.translucent = YES;
tools.backgroundColor = [UIColor clearColor];
tools.tintColor = self.navigationController.navigationBar.tintColor;
[tools setItems:[NSArray arrayWithObjects:flexItem,uiBarRefresh,uiBarCurl,nil] animated:NO];
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:tools];
This way you avoid the dull grey background, the pesky white underline, and you can completely customize how you want them positioned, by using fixed or flex spacings.
Best of luck with your project :]