I have UIViewController(1) without navigationBar, and I need to push anouther UIViewController(2) that have navigationBar, and when I click Back on it, navigationBar must hide on 1 controller. I have tried uiviewcontroller delegates.
But nothing is working..
Please help..
This will show the navbar on the second screen:
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
self.navigationController.navigationBarHidden = NO;
}
You will also need to hide the navbar when you return to the first screen:
- (void)viewDidDisappear:(BOOL)animated {
[super viewDidDisappear:animated];
self.navigationController.navigationBarHidden = YES;
}
I think you want the animated option. If you roll with the approaches above (self.navigationController.navigationBarHidden = value) you get some undesirable visual crumbs.
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
[self.navigationController setNavigationBarHidden:NO animated:YES];
}
- (void)viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
[self.navigationController setNavigationBarHidden:YES animated:YES];
}
This will push/pop smoothly with the navBar firmly attached to the appearing/disappearing view.
Place this code in first view controller
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
self.navigationController.navigationBarHidden = YES;
}
Answers from Alfie or Ader would be a disaster if you have many viewcontrollers' navigation bar hidden/show state to manage.
I just have posted code dedicated on UINavigationBar appearance management on github. check out RRViewControllerExtension, it will solve your problem gracefully.
With RRViewControllerExtension, you even don't have to #import the header file, all you have to do is just override any desired method below in your viewcontroller.
//override any of the methods below in your viewcontroller's .m file to make specific navigation bar appearance
-(BOOL)prefersNavigationBarHidden;
-(BOOL)prefersNavigationBarTransparent;
-(nullable UIColor *)preferredNavatationBarColor;
-(nullable UIColor *)preferredNavigationItemColor;
-(nullable UIImage *)preferredNavigationBarBackgroundImage;
-(nullable NSDictionary *)preferredNavigationTitleTextAttributes;
Related
I am using Navigation controller.
In my first screen their is no need of NavigationBar. As this is the Home screen.So I am hiding it using this code:
- (void)viewWillAppear:(BOOL)animated
{
[self.navigationController setNavigationBarHidden:YES];
}
When I push to new screen I am showing the NavigationBar using this code:
- (void)viewWillAppear:(BOOL)animated
{
[self.navigationController NO];
}
The problem is when I come back from other screens to my HomeScreen I am getting black screen in place of navigationBar.
Here is the problem in Image:
White color screen is my ViewController which has navigation bar and BLue one has'n Navigation bar. How can I remove the black part.
Click on the navigation controller and go to attribute inspector and uncheck the show navigation bar option as shown in the screenshot:
try this one
self.navigationItem.hidesBackButton = YES;
There is a better way to do it. All you need to do is create a subclass of UINavigationController class. Set the UINavigationControllerDelegate. Add the following method in the class.
- (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated
{
if([viewController isKindOfClass: [SomeClass class]])
[self setNavigationBarHidden: NO];
else
[self setNavigationBarHidden: YES];
}
OR
-(void)viewWillDisappear:(BOOL)animated
{
[super viewDidDisappear:animated];
[self.navigationController setNavigationBarHidden:NO animated:YES];
}
-(void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
[self.navigationController setNavigationBarHidden:YES animated:YES];
}
This bug was firstly found in iOS 7, and it can be reproduced in iOS 8 either.
There is a three view controllers A, B and C. Managed by UINavigationController. And I'd like to hide the navigation bar for controller A, not for others.
Here is the code I've written for controller A.
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
self.navigationController.navigationBarHidden = YES;
}
- (void)viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];
self.navigationController.navigationBarHidden = NO;
}
When user comes back via navigation backBarButtonItem, it works fine for me. But when user slides backwards and forward from the left side(That is do not actually go backwards to controller A from controller B, but stay in controller B at last), the navigation bar will go into confusional sate.
Here is a demo to show this issue: [Demo]:https://github.com/heistings/NavigationTest
This problem can be simply fixed by disable the interactivePopGestureRecognizer of navigation controller, but can't say it's perfect:
self.navigationController.interactivePopGestureRecognizer.enabled = NO;
use animated property to YES.
- (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];
}
Maybe this will help you.
This may be the best way for this issue since we have got the animated from framework:
- (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];
}
I got your problem.
First Embed navigation controller to ViewController...
Click on storyboard...
Click on View Controller...
Goto Editor section.
Click on Embed in and then click on navigation controller.
And then Write the code below:
- (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];
}
I'm trying to push a view controller with a visible navigation bar from a view controller with a hidden navigation bar.
I tried all sorts of combinations of [[self navigationController] setNavigationBarHidden:YES animated:NO]; in viewWillAppear, viewDidAppear, viewWillDisappear... etc.
// First View Controller
#implementation FirstViewController
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
[[self navigationController] setNavigationBarHidden:YES animated:NO];
NSLog(#"[%# viewWillAppear]", self);
}
#end
// Second View Controller
#implementation SecondViewController
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
[[self navigationController] setNavigationBarHidden:NO animated:NO];
NSLog(#"[%# viewWillAppear]", self);
}
#end
Nothing worked. I also tried custom code to "animate" a push and pop, which works, BUT I lose the edge swipe and view panning. Before I dig deeper, just want to make sure I'm not reinventing the wheel.
The Starbucks app is what I'm trying to mimic.
The root view controller of the app (the dark background view) is full screen and notice how it doesn't have a UINavigationBar. But when you tap on one of the buttons, it pushes on a view controller (the light background view) WITH a UINavigationBar. From there, if you tap the "back" arrow, it view controller pops with the navigation bar. Interactive pop swipe gesture also works.
It is possible without hacking together a solution by yourself. Here is what you do:
Your root viewController:
#implementation ViewController
....
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
[self.navigationController setNavigationBarHidden:YES animated:animated];
}
#end
And the pushed viewController:
#implementation SecondViewController
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
[self.navigationController setNavigationBarHidden:NO animated:animated];
}
#end
This will do. It also keeps the interactive transition working ;)
I find it disturbing, however, that this type of functionality is not documented at all by apple. - You can also hide and show toolbars with these 'call-points' (inside viewWillAppear:)
EDIT
I just realized that this is the same code you wrote in your question. Please test it again. I am 100% sure that this works - I used this functionality in one of my apps, too.
Please also note that my code does use animated:animated instead of your animated:NO. This may be the crucial point here :)
I just set up two view controllers to test this back and forth.
#interface VC1 ()
#end
#implementation VC1
- (void)viewDidLoad {
[super viewDidLoad];
}
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
self.navigationController.navigationBarHidden = YES;
}
#end
and a second
#import "ViewControllerTwo.h"
#interface ViewControllerTwo ()
#end
#implementation ViewControllerTwo
- (void)viewDidLoad {
[super viewDidLoad];
}
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
self.navigationController.navigationBarHidden = NO;
}
#end
VC1 is embedded in a navigationController (which is the root controller for the app), with a button that navigates to ViewControllerTwo. I have a push segue from VC1 -> ViewControllerTwo, this method works. When I tap on the button, the view controller is visible on ViewControllerTwo, when I press back, the navigationBar is gone.
On View1 I hide the navigationBar in viewDidLoad:
- (void)viewDidLoad
{
[super viewDidLoad];
[self.navigationController setNavigationBarHidden:YES];
}
Then I navigate to View2 where I show the navigationBar
- (void)viewDidLoad
{
[super viewDidLoad];
[self.navigationController setNavigationBarHidden:NO];
self.title = #"Title";
}
But on back to View1 again, the navigationBar doesn't hide, even if I did tried to hide it after the pushViewController in View2
[self.navigationController pushViewController:View1 animated:YES];
[self.navigationController setNavigationBarHidden:YES];
I also tried to hide the navigation from viewWillAppear in View1 and it hides it, but there is an ugly delay and I don't find it as a good practice.
So can anyone help me with this issue, how can I hide correctly the navigationBar on back to View1?
The best practice to do what you want is putting bellow in your first viewController:
- (void)viewWillAppear:(BOOL)animated{
[self.navigationController setNavigationBarHidden:YES animated:animated];
[super viewWillAppear:animated];
}
- (void)viewWillDisappear:(BOOL)animated{
[self.navigationController setNavigationBarHidden:NO animated:animated];
[super viewWillDisappear:animated];
}
-(void) viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
[self.navigationController setNavigationBarHidden:YES];
}
The ViewController1 is not going to get allocated again and so viewDidLoad is not going to get called.
You can do it in viewWillAppear though. But if you are saying that there is a delay, you can do one more thing.
You can get the reference ofViewController1 in ViewController2. Suppose ViewController1 is the first controller in the navigation controller, then do this:
//ViewController2.m
- (IBAction)backButtonPressed:(id)sender{
ViewController1 *view1 = [self.navigationController.viewControllers objectAtIndex:0];
[view1.navigationController setNavigationBarHidden:YES];
Your code is correct, but you need to write like this:
[self.navigationController setNavigationBarHidden:YES];
first, then write
[self.navigationController pushViewController:View1 animated:YES];
See when you are pushing View2 from View2 in navigation stack than View1 doesn't gets deallocated. it is there in in the stack. So when you popping out View2 that time View1 viewDidLoad won't get called. so your code setNavigationBarHidden to hide navigation bar doesn't executes. So put that code to ViewWillAppear or ViewDidAppear because these methods gets called every time View appears.
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
[self.navigationController setNavigationBarHidden:YES];
}
SDK 6.1, Target 6.1, use storyboard
aView has a a UIButton. I use action segue [push] to the bView
When I click this button push bView is ok
But I pop aView have a back bars, how do I solve this problem?
aView.m
-(void)viewWillAppear:(BOOL)animated{
[super viewWillAppear:animated];
[self.navigationController.navigationBar setHidden:YES];
}
bView.m
-(void)viewWillAppear:(BOOL)animated{
[super viewWillAppear:animated];
[self.navigationController.navigationBar setHidden:NO];
}
I got what is your problem. You are hiding your navigation bar in the viewWillAppear: method of viewA and you are doing it without animation.
Try this
// This will add an animation like slide out. So you may won't like it.
[self.navigationController setNavigationBarHidden:YES animated:YES];
If it is not working, then add this code in bView.m
- (void)viewWillDisappear:(BOOL)animated {
[self.navigationController setNavigationBarHidden:YES animated:NO];
[super viewWillDisappear:animated]
}