I'm making an application using UITabBarController and UINavigationController.
The view controller diagram look like this:
TabBar Controller > Navigation Controller > View Controller
At the first view controller I'm set navigation bar to hidden. But when I clicked on TabBar items to show other view controller then clicked back to first view controller the navigation bar was shown. Whenever I added in all other view controllers:
-(void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
self.navigationController.navigationBarHidden = NO;
}
-(void)viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];
self.navigationController.navigationBarHidden = YES;
}
Anyone know how to set my navigation bar in first view controller to always hide? Please help.
Thank in advance.
if you are in some view controller have to use this method:
[self.navigationController setNavigationBarHidden:YES animated:YES];
To hide Navigationbar in any viewController :
Objective-C
- (void)viewWillAppear:(BOOL)animated {
[self.navigationController setNavigationBarHidden:YES animated:animated]; // Will hides Navigationbar
[super viewWillAppear:animated];
}
- (void)viewWillDisappear:(BOOL)animated {
[self.navigationController setNavigationBarHidden:NO animated:animated]; // Will shows Navigationbar
[super viewWillDisappear:animated];
}
Swift
override func viewWillAppear(animated: Bool) {
self.navigationController?.setNavigationBarHidden(true, animated: animated)
super.viewWillAppear(animated)
}
override func viewWillDisappear(animated: Bool) {
self.navigationController?.setNavigationBarHidden(false, animated: animated)
super.viewWillDisappear(animated)
}
If you have multiple tabs at the bottom who follows the structure:
Controller > Navigation Controller > View Controller
Then to hide the navigation bar in the first view controller, you need to use the following code
// TO HIDE NAVIGATION BAR in the first view controller
-(void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
[self.navigationController setNavigationBarHidden:YES animated:animated];
}
// TO SHOW NAVIGATION BAR in other view controllers
If you want all other views should have a navigation bar visible, you could use viewWillDisappear to set it to visible again.
-(void)viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];
[self.navigationController setNavigationBarHidden:NO animated:animated];
}
Related
I have a login view controller that, upon successful login, pushes my user to another view controller (ViewControllerB). That being said, ViewControllerB is embedded in a UINavigationController that I've already formatted with a menu button.
Because I'm using a push segue from the login view controller, this segue causes my UINavigationBar to be covered with a blank nav bar and a back button (not cool). That said, I tried to hide the navigation controller from login view controller with the following code:
loginviewcontroller.m
- (void) viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
[self.navigationController setNavigationBarHidden:YES animated:animated];
}
When I do this, the unwanted navigation bar with the back button covering my other nav bar is removed! Great. However when I then navigate to other screens, my nav bar remains hidden (and I want it to appear once my user makes it past ViewControllerB).
I tried using a modal segue upon successful login, but of course, that keeps me from being able to navigate to other screens with segues upon login.
Any idea how I can go about doing this?
Add this:
- (void)viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];
[self.navigationController setNavigationBarHidden:NO animated:animated];
}
You should embedin UINavigationController from your first Viewcontroller or your loginViewController and at this ViewController you will hide the navigation bar and for your next viewController you can unhide the navigationbar. It has worked for me.
swift 3
override func viewWillAppear(_ animated: Bool) {
//for hide navigation bar in current view
super.viewWillAppear(animated)
self.navigationController?.setNavigationBarHidden(true, animated: animated)
}
override func viewWillDisappear(_ animated: Bool) {
//for unhide in navigation bar in next/previous view
super.viewWillDisappear(animated)
self.navigationController?.setNavigationBarHidden(false, animated: animated)
}
I'm trying to push to a viewController, however i wan't to hide the navigationBar in this viewController. However it does not seem to apply even though i've set below before pushing?
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
let cameraViewController = ALCameraViewController(croppingEnabled: false) { image in
// Do something with your image here.
// If cropping is enabled this image will be the cropped version
}
cameraViewController.navigationController?.setNavigationBarHidden(true, animated: false)
self.navigationController?.pushViewController(cameraViewController, animated: true)
}
the alternate way . you can directly hide/show the navigation bar on cameraViewController
-(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
}
--- In swift ---
override func viewWillAppear(animated: Bool) {
self.navigationController?.navigationBarHidden = true
}
override func viewWillDisappear(animated: Bool) {
self.navigationController?.navigationBarHidden = false
}
--- Swift 4.0 ---
override func viewWillAppear(_ animated: Bool) {
self.navigationController?.isNavigationBarHidden = true
}
override func viewWillDisappear(_ animated: Bool) {
self.navigationController?.isNavigationBarHidden = false
}
Your code isn't working because trying to access navigationController property when it's equal to nil (quote from docs: "This property is nil if the view controller is not embedded inside a navigation controller.")
So, if you need to hide navigation bar in specified view controller use code from Keyur, or, if you can't modify code of this view controller and can't subclass it, you can hide/show navigation bar inside - navigationController:willShowViewController:animated: in your navigation controller delegate
In the storyboards you need select your ViewController and go to Editor->Embebed In->Navigation Controller. I have two Navigation Controllers, one in the root and another follow my ViewController. And the navigationBarHidden true or false, works perfectly for me, in my case.
Please, help me to hide navigation controller in root view. I've found the solution to write [navigationController setNavigationBarHidden:YES] in every view controller which I need. Well, it works but only for the first time: I run application, in root view I don't have navigation, then I go to the second view – the navigation appears, OK. But then I press "Back" in navigation controller, and navigation from root view hasn't disappear. I work with xib.
In rootViewController
-(void)viewWillAppear:(BOOL)animated
{
[self.navigationController setNavigationBarHidden:YES animated:NO];
}
In second View(next to rootViewController)
-(void)viewDidLoad:(BOOL)animated
{
[self.navigationController setNavigationBarHidden:NO animated:NO];
}
Try this out
Use this line of code on all your view controllers
[navigationController setNavigationBarHidden: YES animated:YES];
If no animation is needed you can do animated:NO and add this code in viewDidLoad or put it viewWillAppear or viewDidAppear.
In your case
[navigationController setNavigationBarHidden:YES animated:NO];
on your rootViewController,
and
[navigationController setNavigationBarHidden:NO animated:YES];
on your other viewControllers
Hide Navigation bar all view controller's view will appear method.
-(void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
[navigationCOntroller setNavigationBarHidden:YES animated:animated];
}
I believe you are using tab bar controller.
Your code is working for first view controller as you have code there only. For second view controller, it goes default and hence for second view controller you see navigation bar.
To hide navigation bar for all view controller, put hidden code in all view controllers viewWillAppear
-(void)viewWillAppear:(BOOL)animated
{
[self.navigationController setNavigationBarHidden:YES animated:NO];
}
For Swift developers
Swift 4.2
RootViewController.swift
class RootViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
}
override func viewWillAppear(_ animated: Bool) {
self.navigationController?.setNavigationBarHidden(true, animated: false)
}
}
NextViewController.swift
class NextViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
self.navigationController?.setNavigationBarHidden(false, animated: false)
}
}
I'm trying to figure out how to use the different states of a UISegmentedControl to switch views, similar to how Apple does it in the App Store when switiching between 'Top Paid' and 'Top Free'.
The simplest approach is to have two views that you can toggle their visibility to indicate which view has been selected. Here is some sample code on how it can be done, definitely not an optimized way to handle the views but just to demonstrate how you can use the UISegmentControl to toggle the visible view:
- (IBAction)segmentSwitch:(id)sender {
UISegmentedControl *segmentedControl = (UISegmentedControl *) sender;
NSInteger selectedSegment = segmentedControl.selectedSegmentIndex;
if (selectedSegment == 0) {
//toggle the correct view to be visible
[firstView setHidden:NO];
[secondView setHidden:YES];
}
else{
//toggle the correct view to be visible
[firstView setHidden:YES];
[secondView setHidden:NO];
}
}
You can of course further re-factor the code to hide/show the right view.
In my case my views are quite complex and I cannot just change the hidden property of different views because it would take up too much memory.
I've tried several solutions and non of them worked for me, or performed erratically, specially with the titleView of the navBar not always showing the segmentedControl when pushing/popping views.
I found this blog post about the issue that explains how to do it in the proper way. Seems he had the aid of Apple engineers at WWDC'2010 to come up with this solution.
http://redartisan.com/2010/6/27/uisegmented-control-view-switching-revisited
The solution in this link is hands down the best solution I've found about the issue so far. With a little bit of adjustment it also worked fine with a tabBar at the bottom
Or if its a table, you can reload the table and in cellForRowAtIndex, populate the table from different data sources based on the segment option selected.
One idea is to have the view with the segmented controls have a container view that you fill with the different subviews (add as a sole subview of the container view when the segments are toggled). You can even have separate view controllers for those subviews, though you have to forward on important methods like "viewWillAppear" and "viewWillDisappear" if you need them (and they will have to be told what navigation controller they are under).
Generally that works pretty well because you can lay out the main view with container in IB, and the subviews will fill whatever space the container lets them have (make sure your autoresize masks are set up properly).
Try using SNFSegmentedViewController, an open-source component that does exactly what you're looking for with a setup like UITabBarController.
From the answer of #Ronnie Liew, I create this:
//
// ViewController.m
// ResearchSegmentedView
//
// Created by Ta Quoc Viet on 5/1/14.
// Copyright (c) 2014 Ta Quoc Viet. All rights reserved.
//
#define SIZE_OF_SEGMENT 56
#import "ViewController.h"
#interface ViewController ()
#end
#implementation ViewController
#synthesize theSegmentControl;
UIView *firstView;
UIView *secondView;
CGRect leftRect;
CGRect centerRect;
CGRect rightRect;
- (void)viewDidLoad
{
[super viewDidLoad];
leftRect = CGRectMake(-self.view.frame.size.width, SIZE_OF_SEGMENT, self.view.frame.size.width, self.view.frame.size.height-SIZE_OF_SEGMENT);
centerRect = CGRectMake(0, SIZE_OF_SEGMENT, self.view.frame.size.width, self.view.frame.size.height-SIZE_OF_SEGMENT);
rightRect = CGRectMake(self.view.frame.size.width, SIZE_OF_SEGMENT, self.view.frame.size.width, self.view.frame.size.height-SIZE_OF_SEGMENT);
firstView = [[UIView alloc] initWithFrame:centerRect];
[firstView setBackgroundColor:[UIColor orangeColor]];
secondView = [[UIView alloc] initWithFrame:rightRect];
[secondView setBackgroundColor:[UIColor greenColor]];
[self.view addSubview:firstView];
[self.view addSubview:secondView];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (IBAction)segmentSwitch:(UISegmentedControl*)sender {
NSInteger selectedSegment = sender.selectedSegmentIndex;
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:0.2];
if (selectedSegment == 0) {
//toggle the correct view to be visible
firstView.frame = centerRect;
secondView.frame = rightRect;
}
else{
//toggle the correct view to be visible
firstView.frame = leftRect;
secondView.frame = centerRect;
}
[UIView commitAnimations];
}
#end
Assign .H in
UISegmentedControl *lblSegChange;
- (IBAction)segValChange:(UISegmentedControl *) sender
Declare .M
- (IBAction)segValChange:(UISegmentedControl *) sender
{
if(sender.selectedSegmentIndex==0)
{
viewcontroller1 *View=[[viewcontroller alloc]init];
[self.navigationController pushViewController:view animated:YES];
}
else
{
viewcontroller2 *View2=[[viewcontroller2 alloc]init];
[self.navigationController pushViewController:view2 animated:YES];
}
}
Swift version:
The parent view controller is responsible for setting the size and position of the view of each child view controller. The view of the child view controller becomes part of the parent view controller's view hierarchy.
Define lazy properties:
private lazy var summaryViewController: SummaryViewController = {
// Load Storyboard
let storyboard = UIStoryboard(name: "Main", bundle: Bundle.main)
// Instantiate View Controller
var viewController = storyboard.instantiateViewController(withIdentifier: "SummaryViewController") as! SummaryViewController
// Add View Controller as Child View Controller
self.add(asChildViewController: viewController)
return viewController
}()
private lazy var sessionsViewController: SessionsViewController = {
// Load Storyboard
let storyboard = UIStoryboard(name: "Main", bundle: Bundle.main)
// Instantiate View Controller
var viewController = storyboard.instantiateViewController(withIdentifier: "SessionsViewController") as! SessionsViewController
// Add View Controller as Child View Controller
self.add(asChildViewController: viewController)
return viewController
}()
Show/Hide Child View Controllers:
private func add(asChildViewController viewController: UIViewController) {
// Add Child View Controller
addChildViewController(viewController)
// Add Child View as Subview
view.addSubview(viewController.view)
// Configure Child View
viewController.view.frame = view.bounds
viewController.view.autoresizingMask = [.flexibleWidth, .flexibleHeight]
// Notify Child View Controller
viewController.didMove(toParentViewController: self)
}
private func remove(asChildViewController viewController: UIViewController) {
// Notify Child View Controller
viewController.willMove(toParentViewController: nil)
// Remove Child View From Superview
viewController.view.removeFromSuperview()
// Notify Child View Controller
viewController.removeFromParentViewController()
}
Manage SegmentedControl tapEvent
private func updateView() {
if segmentedControl.selectedSegmentIndex == 0 {
remove(asChildViewController: sessionsViewController)
add(asChildViewController: summaryViewController)
} else {
remove(asChildViewController: summaryViewController)
add(asChildViewController: sessionsViewController)
}
}
And of course you are able to use within your child view controller classes:
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
print("Summary View Controller Will Appear")
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
print("Summary View Controller Will Disappear")
}
Reference:
https://cocoacasts.com/managing-view-controllers-with-container-view-controllers/
A quick Swift Version:
#IBAction func segmentControlValueChanged(_ sender: UISegmentedControl) {
if segmentControl.selectedSegmentIndex == 0 {
// do something
} else {
// do something else
}
}
I have the code below that hides and shows the navigational bar. It is hidden when the first view loads and then hidden when the "children" get called. Trouble is that I cannot find the event/action to trigger it to hide again when they get back to the root view....
I have a "test" button on the root page that manually does the action but it is not pretty and I want it to be automatic.
-(void)hideBar
{
self.navController.navigationBarHidden = YES;
}
-(void)showBar
{
self.navController.navigationBarHidden = NO;
}
The nicest solution I have found is to do the following in the first view controller.
Objective-C
- (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];
}
Swift
override func viewWillAppear(_ animated: Bool) {
self.navigationController?.setNavigationBarHidden(true, animated: animated)
super.viewWillAppear(animated)
}
override func viewWillDisappear(_ animated: Bool) {
self.navigationController?.setNavigationBarHidden(false, 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.
Another approach I found is to set a delegate for the NavigationController:
navigationController.delegate = self;
and use setNavigationBarHidden in navigationController:willShowViewController:animated:
- (void)navigationController:(UINavigationController *)navigationController
willShowViewController:(UIViewController *)viewController
animated:(BOOL)animated
{
// Hide the nav bar if going home.
BOOL hide = viewController != homeViewController;
[navigationController setNavigationBarHidden:hide animated:animated];
}
Easy way to customize the behavior for each ViewController all in one place.
One slight tweak I had to make on the other answers is to only unhide the bar in viewWillDisappear if the reason it is disappearing is due to a navigation item being pushed on it. This is because the view can disappear for other reasons.
So I only unhide the bar if this view is no longer the topmost view:
- (void) viewWillDisappear:(BOOL)animated
{
if (self.navigationController.topViewController != self)
{
[self.navigationController setNavigationBarHidden:NO animated:animated];
}
[super viewWillDisappear:animated];
}
I would put the code in the viewWillAppear delegate on each view being shown:
Like this where you need to hide it:
- (void)viewWillAppear:(BOOL)animated
{
[yourObject hideBar];
}
Like this where you need to show it:
- (void)viewWillAppear:(BOOL)animated
{
[yourObject showBar];
}
The currently accepted answer does not match the intended behavior described in the question. The question asks for the navigation bar to be hidden on the root view controller, but visible everywhere else, but the accepted answer hides the navigation bar on a particular view controller. What happens when another instance of the first view controller is pushed onto the stack? It will hide the navigation bar even though we are not looking at the root view controller.
Instead, #Chad M.'s strategy of using the UINavigationControllerDelegate is a good one, and here is a more complete solution. Steps:
Subclass UINavigationController
Implement the -navigationController:willShowViewController:animated method to show or hide the navigation bar based on whether it is showing the root view controller
Override the initialization methods to set the UINavigationController subclass as its own delegate
Complete code for this solution can be found in this Gist. Here's the navigationController:willShowViewController:animated implementation:
- (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated
{
/* Hide navigation bar if root controller */
if ([viewController isEqual:[self.viewControllers firstObject]]) {
[self setNavigationBarHidden:YES animated:animated];
} else {
[self setNavigationBarHidden:NO animated:animated];
}
}
in Swift 3:
override func viewWillAppear(_ animated: Bool) {
navigationController?.navigationBar.isHidden = true
super.viewWillAppear(animated)
}
override func viewWillDisappear(_ animated: Bool) {
if (navigationController?.topViewController != self) {
navigationController?.navigationBar.isHidden = false
}
super.viewWillDisappear(animated)
}
Give my credit to #chad-m 's answer.
Here is the Swift version:
Create a new file MyNavigationController.swift
import UIKit
class MyNavigationController: UINavigationController, UINavigationControllerDelegate {
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
self.delegate = self
}
func navigationController(_ navigationController: UINavigationController, willShow viewController: UIViewController, animated: Bool) {
if viewController == self.viewControllers.first {
self.setNavigationBarHidden(true, animated: animated)
} else {
self.setNavigationBarHidden(false, animated: animated)
}
}
}
Set your UINavigationController's class in StoryBoard to MyNavigationController
That's it!
Difference between chad-m's answer and mine:
Inherit from UINavigationController, so you won't pollute your rootViewController.
use self.viewControllers.first rather than homeViewController, so you won't do this 100 times for your 100 UINavigationControllers in 1 StoryBoard.
After multiple trials here is how I got it working for what I wanted.
This is what I was trying.
- I have a view with a image. and I wanted to have the image go full screen.
- I have a navigation controller with a tabBar too. So i need to hide that too.
- Also, my main requirement was not just hiding, but having a fading effect too while showing and hiding.
This is how I got it working.
Step 1 - I have a image and user taps on that image once. I capture that gesture and push it into the new imageViewController, its in the imageViewController, I want to have full screen image.
- (void)handleSingleTap:(UIGestureRecognizer *)gestureRecognizer {
NSLog(#"Single tap");
ImageViewController *imageViewController =
[[ImageViewController alloc] initWithNibName:#"ImageViewController" bundle:nil];
godImageViewController.imgName = // pass the image.
godImageViewController.hidesBottomBarWhenPushed=YES;// This is important to note.
[self.navigationController pushViewController:godImageViewController animated:YES];
// If I remove the line below, then I get this error. [CALayer retain]: message sent to deallocated instance .
// [godImageViewController release];
}
Step 2 - All these steps below are in the ImageViewController
Step 2.1 - In ViewDidLoad, show the navBar
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
NSLog(#"viewDidLoad");
[[self navigationController] setNavigationBarHidden:NO animated:YES];
}
Step 2.2 - In viewDidAppear, set up a timer task with delay ( I have it set for 1 sec delay). And after the delay, add fading effect. I am using alpha to use fading.
- (void)viewDidAppear:(BOOL)animated
{
NSLog(#"viewDidAppear");
myTimer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:#selector(fadeScreen) userInfo:nil repeats:NO];
}
- (void)fadeScreen
{
[UIView beginAnimations:nil context:nil]; // begins animation block
[UIView setAnimationDuration:1.95]; // sets animation duration
self.navigationController.navigationBar.alpha = 0.0; // Fades the alpha channel of this view to "0.0" over the animationDuration of "0.75" seconds
[UIView commitAnimations]; // commits the animation block. This Block is done.
}
step 2.3 - Under viewWillAppear, add singleTap gesture to the image and make the navBar translucent.
- (void) viewWillAppear:(BOOL)animated
{
NSLog(#"viewWillAppear");
NSString *path = [[NSBundle mainBundle] pathForResource:self.imgName ofType:#"png"];
UIImage *theImage = [UIImage imageWithContentsOfFile:path];
self.imgView.image = theImage;
// add tap gestures
UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(handleTap:)];
[self.imgView addGestureRecognizer:singleTap];
[singleTap release];
// to make the image go full screen
self.navigationController.navigationBar.translucent=YES;
}
- (void)handleTap:(UIGestureRecognizer *)gestureRecognizer
{
NSLog(#"Handle Single tap");
[self finishedFading];
// fade again. You can choose to skip this can add a bool, if you want to fade again when user taps again.
myTimer = [NSTimer scheduledTimerWithTimeInterval:5.0 target:self selector:#selector(fadeScreen) userInfo:nil repeats:NO];
}
Step 3 - Finally in viewWillDisappear, make sure to put all the stuff back
- (void)viewWillDisappear: (BOOL)animated
{
self.hidesBottomBarWhenPushed = NO;
self.navigationController.navigationBar.translucent=NO;
if (self.navigationController.topViewController != self)
{
[self.navigationController setNavigationBarHidden:NO animated:animated];
}
[super viewWillDisappear:animated];
}
In case anyone still having trouble with the fast backswipe cancelled bug as #fabb commented in the accepted answer.
I manage to fix this by overriding viewDidLayoutSubviews, in addition to viewWillAppear/viewWillDisappear as shown below:
override func viewWillAppear(animated: Bool) {
super.viewWillAppear(animated)
self.navigationController?.setNavigationBarHidden(false, animated: animated)
}
override func viewWillDisappear(animated: Bool) {
super.viewWillDisappear(animated)
self.navigationController?.setNavigationBarHidden(true, animated: animated)
}
//*** This is required to fix navigation bar forever disappear on fast backswipe bug.
override func viewDidLayoutSubviews() {
super.viewDidLayoutSubviews()
self.navigationController?.setNavigationBarHidden(false, animated: false)
}
In my case, I notice that it is because the root view controller (where nav is hidden) and the pushed view controller (nav is shown) has different status bar styles (e.g. dark and light). The moment you start the backswipe to pop the view controller, there will be additional status bar colour animation. If you release your finger in order to cancel the interactive pop, while the status bar animation is not finished, the navigation bar is forever gone!
However, this bug doesn't occur if status bar styles of both view controllers are the same.
If what you want is to hide the navigation bar completely in the controller, a much cleaner solution is to, in the root controller, have something like:
#implementation MainViewController
- (void)viewDidLoad {
self.navigationController.navigationBarHidden=YES;
//...extra code on view load
}
When you push a child view in the controller, the Navigation Bar will remain hidden; if you want to display it just in the child, you'll add the code for displaying it(self.navigationController.navigationBarHidden=NO;) in the viewWillAppear callback, and similarly the code for hiding it on viewWillDisappear
The simplest implementation may be to just have each view controller specify whether its navigation bar is hidden or not in its viewWillAppear:animated: method. The same approach works well for hiding/showing the toolbar as well:
- (void)viewWillAppear:(BOOL)animated {
[self.navigationController setToolbarHidden:YES/NO animated:animated];
[super viewWillAppear:animated];
}
Hiding navigation bar only on first page can be achieved through storyboard as well. On storyboard, goto Navigation Controller Scene->Navigation Bar. And select 'Hidden' property from the Attributes inspector. This will hide navigation bar starting from first viewcontroller until its made visible for the required viewcontroller.
Navigation bar can be set back to visible in ViewController's ViewWillAppear callback.
-(void)viewWillAppear:(BOOL)animated {
[self.navigationController setNavigationBarHidden:YES animated:animated];
[super viewWillAppear:animated];
}
Swift 4:
In the view controller you want to hide the navigation bar from.
override func viewWillAppear(_ animated: Bool) {
self.navigationController?.setNavigationBarHidden(true, animated: animated)
super.viewWillAppear(animated)
}
override func viewWillDisappear(_ animated: Bool) {
self.navigationController?.setNavigationBarHidden(false, animated: animated)
super.viewWillDisappear(animated)
}
By implement this code in your ViewController you can get this effect
Actually the trick is , hide the navigationBar when that Controller is launched
- (void)viewWillAppear:(BOOL)animated {
[self.navigationController setNavigationBarHidden:YES animated:YES];
[super viewWillAppear:animated];
}
and unhide the navigation bar when user leave that page do this is viewWillDisappear
- (void)viewWillDisappear:(BOOL)animated {
[self.navigationController setNavigationBarHidden:NO animated:YES];
[super viewWillDisappear:animated];
}