My program uses
-(void)viewWillAppear:(BOOL)animated{
[super viewWillAppear:animated];
[self.navigationController setNavigationBarHidden:YES]; //it hides
}
to hide a navigation controller and
- (void)viewWillAppear:(BOOL)animated{
}
to describe a AVFoundation camera method. I get a warning for using the same method names. Is there another naming convention i can set to use both methods in my app?
Shouldn't you hide the Navigation Bar in viewDidLoad?
Related
I knew its a duplicate. But still having an issue and even when tried with possibilities didn't work. Hence posting the same to reach a solution. Hope to get help from you guys.
The initial is embedded inside UINavigationController. For the initial (the landing view) the navigation bar must be hidden. The other views when called from the landing view - must show the navigation bar.
I'm handling the hide & show of navbar in the landing view by overriding the methods of the view as follows:
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
// Hiding the navigationbar hidden for the first page
[[self navigationController] setNavigationBarHidden:YES animated:YES];
}
// Even tried animated:NO & animated:animated
- (void)viewDidDisappear:(BOOL)animated
{
[super viewDidDisappear:animated];
// Showing the navigationbar hidden for the first page
[[self navigationController] setNavigationBarHidden:NO animated:YES];
}
While the app loads initially, the nav bar is in hidden state (as expected & working fine). When coming back to the landing view from the child view controller, the nav bar gets hidden after some seconds - the landing view gets loaded on to the ui screen.
I also tried using the navigationcontroller delegate method in landing view: navigationController: willShowViewController: animated:. But unable to reach the solution that i need.
Hence i provided the navigationcontroller delegate in one of my childviewcontroller and checked whether the childcontroller when popped is not in viewcontrollers of the navigationcontroller using if condition. When yes, then i provided the hide option of the navigationbar. but also failed to have the solution.
During surfed, there was a solution to handle with viewanimation. I tried and that too failed.
Again surfed, the solution provided across is to handle the similar issue with viewwillappear & viewwilldisappear. I'm blinked since the way i'm doing is similar to the proposed way. Even then unable to reach a solution.
FYI.. I'm using Xcode 6.3 and deployment target is 6.0 onwards. I'm using storyboard to manage views.
Please help me sort the issue... App loads is hiding the nav bar in landing page. But when landing page is loaded back from a child view then the nav bar gets hidden only after the landing page loaded on to the ui. I do need to get hidden of the nav bar as like when app loads, when the child view pops and the landing view gets loaded on the top of the controller.
If you want to hide navigation bar in the second view then don't try to manage in viewWillAppear and viewWillDisappear because I have faced a lot of problems by trying like that and it also effected the constraints. Just use delegate for navigation controller in appDelegate it is working fine for me.
self.navigationController.delegate = self;
- (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated {
if ([viewController isKindOfClass:[LoginViewController class]])
{
[self.navigationController setNavigationBarHidden:YES animated:animated];
} else {
[self.navigationController setNavigationBarHidden:NO animated:animated];
}
}
Use this method:
[navigationController setNavigationBarHidden:YES];
So, if you are in some view controller:
[self.navigationController setNavigationBarHidden:YES];
More clarifications:
UINavigationController has a property navigationBarHidden, that allows you to hide/show navigation bar for whole nav controller.
Let's look at the next hierarchy:
--UINavigationController
----UIViewController1
----UIViewController2
----UIViewController3
Each of three UIViewController will have nav bar since they are in UINavigationController. For example, you want to hide bar into the second (actually it doesn't matter in which one), then write into UIViewController2:
-(void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
[self.navigationController setNavigationBarHidden:YES]; //it hides
}
-(void)viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];
[self.navigationController setNavigationBarHidden:NO]; // it shows
}
Overwrite the delegate method in your custom UINavigationController class:
-(void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated
{
[self setNavigationBarHidden:NO];
if ([viewController isKindOfClass:[SomeViewController class]])
{
[self setNavigationBarHidden:YES];
}
}
One advantage for putting it in your UINavigationController class is that you don't clutter your UIViewController class with code
Tested and works.
UPDATE
Create a UINavigationController subclass: f.e. MyNavigationController
In AppDelegate.h:
#import "MyNavigationController.h"
#property (nonatomic) MyNavigationController *navigationController;
Then initialise it in AppDelegate.m:
-(BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
//Probably some more code here
self.navigationController = [[MyNavigationController alloc] initWithRootViewController:yourRootViewController];
self.window.rootViewController = self.navigationController;
self.window.backgroundColor = [UIColor blackColor];
[self.window makeKeyAndVisible];
return YES;
}
Then overwrite the delegate method in your custom UINavigationController class
I have little to no experience with storyboards so not really sure how to setup a custom UINavigationController, but this is how I do it in code.
Here's another SO post how to create a custom UINavigationController to use with storyboards.
In my application I have to show one screen with navigation bar and then by pushing another controller with no navigation bar.
When I come back I again want to show the navigation bar. But, my navigation bar is not visible with complete height.
I set the navigation bar with no translucent, and style opaque.
can you help me anyone.
this will hide and show navigation bar perfectly:
in first view controller implement:
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
[self.navigationController setNavigationBarHidden:NO animated:YES];
}
in pushed view controller:
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
[self.navigationController setNavigationBarHidden:YES animated:YES];
}
Show some code...
or try showing the navigation bar from the view controller you're coming back from just before you tell it to go back... Should avoid the issue. But suspect you're doing something else wrong.
Use this method:
In view controller where you want to hide navigation bar add the below code in viewWillAppear
[navigationController setNavigationBarHidden:YES];
So, if you are in some view controller:
In view controller where you want to show navigation bar add the below code in viewWillAppear
[self.navigationController setNavigationBarHidden:NO];
I use following method to disable the Navigation bar throughout the app:
[navcontroller setNavigationBarHidden:YES animated:YES];
But is it possible to disable it only for one ViewController?
Certainly. Whenever you enter a viewcontroller, you can enable or disable for that viewcontroller (just call [[self navigationController] setNavigationBarHidden:YES animated:YES] during viewWillAppear
The nicest solution I have found is to do the following in the first view controller.
- (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];
}
This will cause the navigation bar to animate in from the left (together with the next view) when you push the next UIViewController on the stack, and animate away to the left (together with the old view), when you press the back button on the UINavigationBar.
Please note also that these are not delegate methods, you are overriding UIViewController's implementation of these methods, and according to the documentation you must call the super's implementation somewhere in your implementation.
Hopefully this will resolve your problem.
I have a main view controller that lists a bunch of items, and when they tap on one of the items it segues them to the next view. However, in the next view, I don't want the navigation bar to be there, I only want it in the first view (I'm using a UIToolBar for the navigation bar, kind of like in iBooks).
How exactly do I go about achieving this? If I remove the main view controller from the navigation controller completely (unembedding, effectively) I can implement the nav bars selectively, but this solution doesn't allow segues, so it's no good.
My other solution was to call self.navigationController.navigationBarHidden = YES; in viewDidAppear for the second view, but with this, the UIToolBar that I added in my storyboard is pushed under the navigation bar that hasn't been hidden yet, and then when it does get hidden, it disappears and the UIToolBar "falls down", which is a pretty gross effect to the user.
What would be the best way to go about getting this effect?
The best way to do that is the following. In you viewWillAppear: in the first (rootViewController) of your UINavigationController, you set:
-(void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
[self.navigationController setNavigationBarHidden:NO animated:animated];
}
and then in you viewWillDisappear, you the the opposite:
-(void)viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
[self.navigationController setNavigationBarHidden:YES animated:animated];
}
This way should work without nothing 'ugly' happening to the user.
using xcode 4.2 and iOS 5 and have nav bar on root controller and four other views (inc UITable view) all i want is to hide nav bar in first root view controller and show in all other views...
Tried following
[self.navigationController setNavigationBarHidden:YES animated:animated];
No luck any ideas?
Use this code in your root controller (or all of your view controllers that you want to have a hidden navigation bar. see [1] though) in order to hide/show the navigation bar according to what you are aiming at:
- (void)viewDidLoad {
...
[self.navigationController setNavigationBarHidden:YES animated:NO];
...
}
- (void)viewWillAppear:(BOOL)animated {
[self.navigationController setNavigationBarHidden:YES animated:animated];
....
}
- (void)viewWillDisappear:(BOOL)animated {
[self.navigationController setNavigationBarHidden:NO animated:animated];
...
}
This is just a possible solution. You could well leave viewWillDisappear undefined in your non-root controllers and define viewWillAppear in your root controller... as you see it most convenient for you.
[1] Hiding the navigation bar in anything but the root controller makes it possible to get stuck in the middle of your navigation hierarchy. Also it is against intuitive navigation in an iOS app to suddenly hide the navigation bar for anything else than the root view.)
You can hide this by using this code
self.navigationController.navigationBar.hidden = YES;
Use this code in view did load