I am programming for iOS 5 using storyboards.
I am trying to create an app with a navigation controller.
In my app I want some view controllers to have the navigation bar and in some I dont.
I am using the following link as my guidance to create one.
This is how I am programmatically hiding the navigation bar:
In MyAppDelegate I declared a variable:
UINavigationController *navigationController;
#property (strong, nonatomic) IBOutlet UINavigationController *navigationController;
In my UIViewController, which is the first UIViewController, I did the following
- (void)viewDidload
{
[self.navigationController setNavigationBarHidden:YES animated:YES];
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
But this is not working...
How do I make it work?
Raj,
Try adding these two functions to your UIViewController:
- (void) viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
[self.navigationController setNavigationBarHidden:YES animated:animated];
}
- (void) viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
[self.navigationController setNavigationBarHidden:NO animated:animated];
}
Select Navigation Controller in story board, go to attributes inspector, there's a checkbox called Shows Navigation Bar, uncheck it.
If setting setNavigationBarHidden:YES in viewWillAppear:, the animation (hiding navigation bar) will still present.
This's the main difference.
Related
I have an app where the first screen (the menu for the app) does not need a navigation bar BUT the rest of the app does.
The code I am using works fine in the sense that the navigation bar is not present on the menu screen and is present elsewhere in the app BUT the BIG PROBLEM is that once you go back to the menu the navigation bar appears for about a split second and then disappears.
That is NOT a very smooth transition.
How do I make the transition SMOOTHER so that the navigation bar DOESN'T even appear for a second when I go back to the menu screen?
Here is the code that I am using:
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
if (self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]) {
[self.navigationController setNavigationBarHidden:YES animated:NO];
}
return self;
}
- (void)viewDidLoad {
[self.navigationController setNavigationBarHidden:YES animated:NO];
[super viewDidLoad];
}
-(void) viewDidAppear: (BOOL)animated {
[[self navigationController] setNavigationBarHidden:YES animated:NO];
[super viewDidAppear:animated];
}
Try like this,
-(void) viewWillAppear: (BOOL)animated {
[super viewWillAppear:animated];
[[self navigationController] setNavigationBarHidden:YES animated:YES];
}
Hope it may helps you...
In your first view controller:
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
[self.navigationController setNavigationBarHidden:YES animated:YES];
}
- (void)viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
[self.navigationController setNavigationBarHidden:NO animated:YES];
}
In your second view controller (not needed, but good practice for code clarity) :
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
[self.navigationController setNavigationBarHidden:NO animated:YES];
}
set this in the view did disappear in first screen of the app
[[self navigationController] setNavigationBarHidden:NO animated:YES];
and this in viewdiddisappear of the second VC
[self.navigationController setNavigationBarHidden:YES animated:NO];
Instead of hiding and showing the navigation bar, you can update the alpha for the navigation bar. It will animate smoothly during the transition. For the view controller with transparent nav bar, instead of modifying the nav bar, create a navbar (or just the back button and title etc.) manually in the second controller's view. We will then hide the navbar when transitioning from first view controller to the second one.
On your second controller's viewWillDisappear and on your first view controller's viewWillAppear:, set the navigation bar alpha to zero using self.navigationController.navigationBar.alpha = 0;. Since this is in animation block, this will make the navigation bar disappear during the push animation.
Set the alpha back to one in second controller's viewWillAppear and first controller viewWillDisappear.
I have been having issues forever with an app, and getting certain views to rotate.
I already know that no view in a tab bar controller can rotate, unless ALL are allowed to rotate. I also know that no view within a navigation controller can rotate unless the top most view is allowed to rotate.
I used IB mostly to setup my app.
In the MainWindow.xib I have the AppDelegate Object, Window, TabBarController, and then a separate UIViewController.
Within one of the tabs of the tab bar, I have an IBAction linked to a UIButton with the following code:
-(IBAction)stuff {
[self presentViewController:buletinss animated:YES completion:nil];
}
The view controller is declared in the header file as an IBOutlet, and is linked from that tab class to the UIViewController. In IB, I then set the class for that view controller to a UIViewController class I set up, and return YES to allow it to rotate.
However, it still will not rotate.
I thought that since it was not a part of the tab bar, and not pushed from a navigation controller, that it would be allowed to rotate, but I am having no luck. Please any help?
Here is full code:
First, the .h and .m for the view that has the button:
#import <UIKit/UIKit.h>
#interface BulletinViewController : UIViewController {
IBOutlet UIWebView *worship;
IBOutlet UIActivityIndicatorView *activity;
NSTimer *timer;
IBOutlet UIViewController *buletinss;
}
-(IBAction)stuff;
#property (nonatomic, retain) UIActivityIndicatorView *activity;
#end
and the .m
#import "BulletinViewController.h"
#implementation BulletinViewController
-(IBAction)stuff {
[self presentViewController:buletinss animated:YES completion:nil];
}
Now the .h and the .m of the view it is presenting
#import <UIKit/UIKit.h>
#interface TestBulletinViewController : UIViewController
#end
and the .m
#import "TestBulletinViewController.h"
#implementation TestBulletinViewController
-(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation {
return YES;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#end
Try change this code
[self presentViewController:buletinss animated:YES completion:nil];
to
[self presentModalViewController:buletinss animated:YES];
UPD: in iOS 6 you must:
1)
Replace
[window addSubview:buletinss.view];
with
window.rootViewController = buletinss;
2)
Add this code lines
- (BOOL)shouldAutorotate
{
return YES;
}
- (NSUInteger)supportedInterfaceOrientations
{
return UIInterfaceOrientationMaskLandscape;
}
It's hard to know what's going on without seeing your project. You're doing a very odd thing: why are you loading a view controller from a nib? You are saying:
IBOutlet UIViewController *buletinss;
Why? Why are you not explicitly instantiating a BulletinViewController and setting the ivar to that?
I'm betting that the problem is that in the nib, this object is not a BulletinViewController. It's probably just a generic UIViewController. Hence your BulletinViewController code is irrelevant; none of it ever runs. Instead, you've got a generic UIViewController that only rotates to portrait. But that's just a guess.
I'm using the following code to hide my navigationBar in the detailViewController(my second view),
and it works perfectly fine when I tap any of my object from the MasterViewController(my first view).
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
[self.navigationController setNavigationBarHidden:YES animated:animated];
}
However, when I filter the table list in the masterViewController using searchDisplayController
and tap any object from the result, the navigationBar in the detailView doesn't get hidden...
Do I have to do any extra work to hide the navigationBar if I use the searchDisplayController?
for Debug, I set the break point on the line of setNavigationBarHidden:YES, and even if
I go to the detailViewController via search result, the application hits the line..
you shuold put [self.navigationController setNavigationBarHidden:YES]; in viewWillLayoutSubviews function.like this:
- (void) viewWillLayoutSubviews
{
[super viewWillLayoutSubviews];
[self.navigationController setNavigationBarHidden:YES];
}
it works.
You should try this method:
In that controller, where you declared UISearchController *searchController, you should implement two methods (only for example):
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
// if you want to hide Navigation Bar when searchController will become active
_searchController.hidesNavigationBarDuringPresentation = YES;
}
- (void)viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
_searchController.hidesNavigationBarDuringPresentation = NO;
}
The code above may have differences. Main point in hidesNavigationBarDuringPresentation property (iOS 8.0 and later). Try to play with it, and turn to hidesNavigationBarDuringPresentation = NO before pushing a new controller. After this manipulations I took profit: when pushed UIViewController, setter setNavigationBarHidden:YES become working
if you want to hide Navigation bar then, In your MainWindow xib uncheck "Shows Navigation Bar" attributes of Navigation Controller.
This Will hide the Navigation Bar in your Whole Project. If you want to Show Navigation Bar in any Controller set NavigationBar Hidden = NO in ViewDidLoad Method of that Controller.
you should hack search display controller in some way to hide its built in navigationBar.
here is the answer:
https://stackoverflow.com/a/6337037/1348121
This
- (void) viewWillLayoutSubviews
causes layout problems, so i used code below. Works fine for me.
-(void)viewWillAppear:(BOOL)animated{
[super viewWillAppear:animated];
[self.navigationController setNavigationBarHidden:NO];
}
Hey everyone, I am new to iPhone development and I'm not understanding the whole UINavigationController and UITabBarController idea. Is one a substitute for the other - how do apps such as Tweetie combine both?
I'd like to have my app have a persistent Tab Bar # the bottom (which seems to be working), but also a Navigation bar at the top which can push/pop views onto the screen without removing the tab bar.
How can I accomplish this?
What should the hierarchy look like in IB as far as my MainWindow.xib with regards to all of these controllers?
What is best practice here?
Thanks very much,
Just wrap the view controller inside the UINavigationController and Place the UINavigationController inside the UITabBar.
This will work fine for you…
Example:
NSMutableArray *tabBarViewControllers = [[NSMutableArray alloc] initWithCapacity:2];
tabBarController = [[UITabBarController alloc] init];
[tabBarController setDelegate:self];
UINavigationController *navigationController = nil;
navigationController = [[UINavigationController alloc] initWithRootViewController:<Your View controller1>];
[tabBarViewControllers addObject:navigationController];
[navigationController release];
navigationController = nil;
navigationController = [[UINavigationController alloc] initWithRootViewController:<Your View controller2>];
[tabBarViewControllers addObject:navigationController];
[navigationController release];
navigationController = nil;
tabBarController = tabBarViewControllers;
[tabBarViewControllers release];
tabBarViewControllers = nil;
Use the wizard for a Tab Bar Application, and set it up as normal. In any tab where you want to add a navigation controller, create it in the XIB using the library. My XIB has:
- File's Owner DescriptiveNameNavViewController
- First Responder
- View UIVIew
- Navigation Controller UINavigationController
- Navigation Bar UINavigationBar
Note that there isn't anything in the view. See viewDidLoad below for where the UINavigationController gets attached to the UIView.
In the header file for the Tab's ViewController (which I've here called DescriptiveNameNavViewController -- there isn't a particular standard for this, but I use [Something]NavViewController to remind me that this ViewController contains a navigation controller with the navigation stack. This is the controller name that I set in the MainWindow.xib that the wizard generates) Set up a UINavigationController * IBOutlet that has the navigation controller in the XIB attached to it:
#interface DescriptiveNameNavViewController : UIViewController {
UINavigationController *navigationController;
}
#property (nonatomic, retain) IBOutlet UINavigationController *navigationController;
#end
In the controller for the DescriptiveNameNavViewController , do something like this:
- (void)viewDidLoad {
[super viewDidLoad];
[[self view] addSubview:[navigationController view]];
DescriptiveNameController *aController = [[[DescriptiveNameController alloc ] initWithNibName:#"DescriptiveNameController" bundle:nil ] autorelease];
aController.title = #"Descriptive Title";
//
// app stuff goes here.
//
[self.navigationController pushViewController:aController animated:YES];
[self.navigationController setDelegate:self];
}
Setting the delegate in the DescriptiveNameNavViewController is super-important, because otherwise you won't get the methods called that you expect in DescriptiveNameViewController instances and anything else you push into the navigation controller's stack.
In DescriptiveNameNavViewController, implement the UINavigationControllerDelegate methods like this:
- (void)navigationController:(UINavigationController *)navigationController didShowViewController:(UIViewController *)viewController animated:(BOOL)animated
{
if ([viewController respondsToSelector:#selector(viewDidAppear:)]) {
[viewController viewDidAppear:animated];
}
}
And that will cause messages to get propagated to controllers inside the UINavigationController like you expect. It seems like many problems that people encounter are because the viewDidAppear: or other methods aren't getting called on the ViewControllers pushed into the NavigationController.
Anyway, let me know if more detail would help.
The New York Times iPhone application has a Tab Bar with five tab bar items. When you select the Latest tab, the app shows the title and abstract/summary in a UITableView. When you select an individual story to read, the Tab Bar disappears and is replaced with a header and footer that appears/disappears depending on the state of the app. How does the app "hide" the tab bar?
Thanks!
Implement this piece of code in the class where you want to hide the Tab Bar.
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
if (self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]) {
// Custom initialization
}
self.hidesBottomBarWhenPushed = YES;
return self;
}
All the best.
The view controller that is being pushed onto the navigation controller stack has its hidesBottomBarWhenPushed parameter set to yes. The code would look something like this in the table view's -didSelectRowAtIndexPath.
NSDictionary *newsItem = [newsItems objectAtIndex:[indexPath row]];
NewsDetailViewController *controller = [[NewsDetailViewController alloc] init];
[controller setHidesBottomBarWhenPushed:YES];
[controller setNewsItem:newsItem];
[[self navigationController] pushViewController:controller animated:YES];
[controller release], controller = nil;
Take a look at the documentation for hidesBottomBarWhenPushed.
p.s. You'll probably get more visibility on this question if you add the tag 'iphone' to it.
I have a view that needs to optionally (depending on some other state) show the navigation controller toolbar. This is the solution I used to show & hide the toolbar (with animation) when the view appears & disappears via navigation. It sounds like what you might be after.
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
// Show the nav controller toolbar if needed
if (someBool)
[self.navigationController setToolbarHidden:NO animated:animated];
}
- (void)viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
// Hide the nav controller toolbar (if visible)
[self.navigationController setToolbarHidden:YES animated:animated];
}