I've created the following storyboard:
Navigation Controller
Login View Controller
Tab Controller
Navigation Controller
Search View Controller
Results View Controller
Detail View Controller
Navigation Controller
Advanced Search View Controller
Results View Controller
Detail View Controller
When the user taps a tab bar button I want to make sure that the view they see is the Search (if they tapped Search) or Advanced Search (if they tapped Advanced) not the point in the stack they might have previously been on for a given tab. In other words, I want to have them start at the top/root view
I've set the tab bar's delegate to a class and implemented the didSelectViewController as:
Tab bar controller .h
#import <UIKit /UIKit.h>
#interface TabController : UITabBarController <UITabBarControllerDelegate>
#end
Tab bar controller .m
- (void) viewDidLoad
{
[super viewDidLoad];
self.delegate = self;
}
- (void) tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController
{
[viewController.navigationController popToRootViewControllerAnimated:YES];
}
In both the Search and Advanced Search Controller .m
- (void) viewWillAppear
{
[super viewWillAppear:animated];
//Hide the nav bar at the search/advanced controller level. Will be shown at results and detail levels
[[self navigationController] setNavigationBarHidden:YES animated:YES];
//Set the text for the back button
UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithTitle: #"title" style: UIBarButtonItemStyleBordered target: nil action: nil];
[self.navigationItem setBackBarButtonItem: backButton];
}
The result is that when the user taps the Advanced Search button nothing appears but a black screen. Comment out that code and the Advanced Search is properly displayed.
Note that the Results and Detail Controllers are reused for both the search and advanced searches.
Any ideas? Thanks for your help. If a keep banging my head against this wall I won't have to buy a halloween costume!
I had same kind of issue. I have used this code and it worked.[(UINavigationController *)viewController popToRootViewControllerAnimated:NO];
Related
How to navigation to previous page!
I add navigation controller to appDelegate so thought out the application i do have navigation controller.
I hidden navigation Bar and added HeaderView on the top.
// Hidden NavigationBar
- (void) viewWillAppear:(BOOL)animated
{
[self.navigationController setNavigationBarHidden:YES animated:animated];
[super viewWillAppear:animated];
}
Now customize my header bar with UIView! I hidden navigation Bar and added HeaderView on the top.
Now i added BackButton to the header Bar. Now i want to navigation pervious page. Can any one suggest me?
#Thanks In Advance.
if the view is called by a push action, call :
[self.navigationController popViewControllerAnimated:YES];
else if the view is displaying by a modal call :
[self dismissModalViewControllerAnimated:YES];
Use [self.navigationController popviewControllerAnimated :YES];
Use this when the user taps the Back button:
[self popViewControllerAnimated:YES];
I have a button when it pressed, I want it to take me to another view (the "news" view). Within the news view, I want there to be a navigation bar with a back button. I have a navigationcontroller setup throughout my app but I can't seem to get this to work when this button is pressed. It takes me to the view I want but there is no navigation bar and no back button. This is my code that is implemented when the button is pressed.
If anybody know what I am doing wrong, it would be much appreciated.
Thanks
-(IBAction)news
{
newsViewController *view1 = [[newsViewController alloc] initWithNibName:#"newsViewController" bundle:nil];
view1.title=#"news";
[self.navigationController pushViewController:view1 animated:YES];
}
I am not in my mac, so I can not test code, but if it is working and the only issue you got is not show the bar, what you need to is set the bar to be visible:
From apple docs:
The navigation toolbar is hidden by default but you can show it for
your navigation interface by calling the setToolbarHidden:animated:
method of your navigation controller object. If not all of your view
controllers support toolbar items, your delegate object can call this
method to toggle the visibility of the toolbar during subsequent push
and pop operations.
Something like that is supposed to work:
-(IBAction)news {
newsViewController *view1 = [[newsViewController alloc] initWithNibName: #"newsViewController" bundle:nil];
view1.title=#"news";
[self.navigationController pushViewController:view1 animated:YES];
//Add this line!
[self.navigationController setNavigationBarHidden:NO animated:YES];
}
I hope it can help you.
write the below code in page where you want to show navigation controller
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
self.navigationController.navigationBarHidden = NO;
}
I have a tabBarController that I add by placing the following code into:
AppDelegate.h:
...
UITabBarController IBOutlet *tabBarController;
}
#property (nonatomic, retain) IBOutlet UITabBarController *tabBarController;
AppDelegate.m:
...
[self.window addSubview:tabBarController.view];
[self.window makeKeyAndVisible];
[tabBarController setDelegate:self];
I then use the following code to present a modal barcode scanning View Controller:
- (void)tabBarController:(UITabBarController *)tbc didSelectViewController:(UIViewController *)vc {
// Middle tab bar item in question.
if (vc == [tabBarController.viewControllers objectAtIndex:2]) {
ScanVC *scanView = [[ScanVC alloc] initWithNibName:#"ScanViewController" bundle:nil];
// set properties of scanView's ivars, etc
UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:scanView];
[tabBarController presentModalViewController:navigationController animated:YES];
[navigationController release];
[scanView release];
}
}
When it does actually get presented I think this method isn't visually appealing, because when I dismiss the modal view I am brought back to an empty view.
A lot of barcode scanning applications or applications that simply display an image picker for example; do this quite successfully. I'm just wondering what kind of implementation they would use in order to achieve such an effect.
This is a screenshot of an application called Path, which has the exact same functionality I'm after:
I also noticed that in these applications, if you are on any other tab bar item other than the middle one let's say, and you click on the tab bar item that presents the modal view, once it gets dismissed it doesn't actually bring them back to an empty view it dismisses like normal, however the actual tab bar item that presents the modal view is never selected. I would be happy with this type of functionality if that's the only way to implement this type of effect.
Any help would be greatly appreciated as I've been stuck in this for quite some time. Also I'm not even sure whether it's the right way to put all of this code in my AppDelegate in order for the View Controller to be presented as a modal. It all seems, just, wrong.
Not entirely what I'm after, but I think I can move forward from this:
http://idevrecipes.com/2010/12/16/raised-center-tab-bar-button/
When you dismiss the modal view controller, tell the tab bar to select whatever tab was originally selected.
- (void)dismissModalViewControllerAnimated:(BOOL)animated
{
// do whatever you need to do when dismissing
// savedTabIndex is an int ivar
// tabBarController is a reference, set when showing the modal view
[[self tabBarController] setSelectedIndex:savedTabIndex];
}
You would have to save the original tab bar selection in a variable at the start of tabBarController:didSelectViewController:.
- (void)tabBarController:(UITabBarController *)tbc
didSelectViewController:(UIViewController *)vc
{
// Save the tab bar index (if it's not the photo tab)
if ([tabBarController selectedIndex] != 3]) {
savedTabIndex = [tabBarController selectedIndex];
}
}
There could be mistakes in this code, I just typed it without testing.
I found a really easy solution by playing around UITabBarControllerDelegate--I only tried this in iOS 7 though.
First, subclass UITabBarController, make it its own UITabBarControllerDelegate, and create a property that'll hold a reference to the tab you want to launch a modal with. In my app, it's called the "Sell" tab.
#property (strong, nonatomic) UIViewController *sellTab;
Then, in your init method, just create that view controller and add it to the tabs.
_sellTab = [[UIViewController alloc] init];
_sellTab.title = #"Sell";
self.viewControllers = #[homeTab, historyTab, _sellTab, bookmarksTab, profileTab];
Now here's where the magic is: override the following tab bar controller delegate methods. Code is pretty self-explanatory.
#pragma mark - Tab bar controller delegate
- (BOOL)tabBarController:(UITabBarController *)tabBarController shouldSelectViewController:(UIViewController *)viewController
{
return viewController != self.sellTab;
}
- (void)tabBar:(UITabBar *)tabBar didSelectItem:(UITabBarItem *)item
{
if (item == self.sellTab.tabBarItem) {
[self presentViewController:[[UINavigationController alloc] initWithRootViewController:[[PostAdViewController alloc] init]] animated:YES completion:nil];
}
}
This will launch a modal which, upon dismissal, shows the same tab you were in before launch.
You shouldn't present a modal view, when the user clicks on a tab bar item.
You could instead present a modal view from within a view that's presented by one of the tabs.
Or, if you just have a single main view and the scan view you want to present modally, you should just use a button to present the scan view from within your main view. You could for instance use a toolbar with a single button in it, instead.
I am showing a modal view which is a UITableViewController class. For some reason it won't show the navigation bar when I show it. Here is my code:
SettingsCreateAccount *detailViewController = [[SettingsCreateAccount alloc] initWithStyle:UITableViewStyleGrouped];
detailViewController.modalTransitionStyle = UIModalTransitionStyleCoverVertical;
detailViewController.navigationController.navigationBarHidden = NO;
[self.navigationController presentModalViewController:detailViewController animated:YES];
detailViewController = nil;
[detailViewController release];
I thought it was shown by default? If it helps, I am calling this from another class that is also a UITableViewController managed by a UINavigationController. Ideas?
When you present a modal view controller it does not use any existing navigation controllers or navigation bars. If all you want is to display a navigation bar, you need to add the navigation bar as a subview of your modal view and present it as you're doing.
If you want to present a modal view controller with navigation functionality, you need to present a modal navigation controller containing your detail view controller instead, like so:
SettingsCreateAccount *detailViewController = [[SettingsCreateAccount alloc] initWithStyle:UITableViewStyleGrouped];
UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:detailViewController];
[detailViewController release];
navController.modalTransitionStyle = UIModalTransitionStyleCoverVertical;
[self presentModalViewController:navController animated:YES];
[navController release];
Your modal controller will manage its own navigation stack.
Here is one way to display navigation bar for those who are using storyboards, suggested by Apple's Tutorial on Storyboard.
Because a modal view controller doesn’t get added to the navigation stack, it doesn’t get a navigation bar from the table view controller’s navigation controller. To give the view controller a navigation bar when presented modally, embed it in its own navigation controller.
In the outline view, select View Controller.
With the view controller selected, choose Editor > Embed In > Navigation Controller.
On iOS 7 and you just want a navigation bar on your modal view controller to show a title and some buttons? Try this magic in your UITableViewController:
// in the .h
#property (strong) UINavigationBar* navigationBar;
//in the .m
- (void)viewDidLoad {
[super viewDidLoad];
self.navigationItem.title = #"Awesome";
self.navigationBar = [[UINavigationBar alloc] initWithFrame:CGRectZero];
[self.view addSubview:_navigationBar];
[self.navigationBar pushNavigationItem:self.navigationItem animated:NO];
}
-(void)layoutNavigationBar{
self.navigationBar.frame = CGRectMake(0, self.tableView.contentOffset.y, self.tableView.frame.size.width, self.topLayoutGuide.length + 44);
self.tableView.contentInset = UIEdgeInsetsMake(self.navigationBar.frame.size.height, 0, 0, 0);
}
-(void)scrollViewDidScroll:(UIScrollView *)scrollView{
//no need to call super
[self layoutNavigationBar];
}
-(void)viewDidLayoutSubviews{
[super viewDidLayoutSubviews];
[self layoutNavigationBar];
}
I want to share how the accepted solution can be used in projects with storyboards:
The simple approach is to put in a storyboard blank navigation controller before the VC which is to be presented modally, so the relations look like:
(Presenter VC) -> presents modally -> (navigation controller having a controller to be presented as its root).
We've tried this approach for a while and noticed that our storyboards become "polluted" by a large number of such intermediate navigation controllers when each! of them is used exclusively for one! presentation of some other controller, that we want to be presented modally with navigation bar.
Our current solution is to encapsulate the code from accepted answer to a custom segue:
#import "ModalPresentationWithNavigationBarSegue.h"
#implementation ModalPresentationWithNavigationBarSegue
- (void)perform {
UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:self.destinationViewController];
[self.sourceViewController presentViewController:navigationController animated:YES completion:nil];
}
#end
Having this segue in our project we do not create intermediate navigation controllers in our storyboards anymore, we just use this ModalPresentationWithNavigationBarSegue like:
Presenter VC --> Presentee VC
I hope that this answer will be helpful to people who like to avoid unnecessary duplication in their apps storyboards.
I just wanted to add something to what #Scott said. His answer is definitely the easiest and most accepted way of doing it now with Storyboards, iOS 7 and 8... (and soon, 9).
Definitely adding a view controller to the Storyboard and Embedding it as described by #Scott is the right way to go.
Then, just add the segue by control-dragging from the source view controller to the target (the one you want to show modally), select "Present Modally" when the little view appears with the choices for the type of segue. Probably good to give it a name too (in the example below I use "presentMyModalViewController").
One thing that I needed that was missing is #Scott's case is when you want to actually pass on some data to that modally-presented view controller that is embedded in the navigation controller.
If you grab the segue.destinationViewController, it will be a UINavigationController, not the controller you embedded in the UINavigationController.
So, to get at the embedded view controller inside the navigation controller, here's what I did:
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if ([segue.identifier isEqualToString:#"presentMyModalViewController"]) {
// This could be collapsed, but it's a little easier to see
// what's going on written out this way.
// First get the destination view controller, which will be a UINavigationController
UINavigationController *nvc = (UINavigationController *)segue.destinationViewController;
// To get the view controller we're interested in, grab the navigation controller's "topViewController" property
MyModalViewController *vc = (EmailReceiptViewController *)[nvc topViewController];
// Now that we have the reference to our view controller, we can set its properties here:
vc.myAwesomeProperty = #"awesome!";
}
}
Hope this helps!
If you only need a NavigationBar, you can add an instance of UINavigationBar and assign BarItems to it.
I've been wandering how to hide / remove / disable only the main or first navigation bar in the navigation controller so that I could put an image as a whole background screen but I couldn't find any solution.
Did try hide the titleview in viewdidLoad of the main navigation controller but didn't work. Tried using navigationBarHidden but it hides the whole navigation bar for the next stack of controller.
So, I'm not sure how to do this. To give you an example, I would like to have something like this app - The Masters Golf Tournament - http://appshopper.com/sports/the-masters-golf-tournament.
If you look at Screen 1, it doesn't have any nav bar at the top but when you touch any options it will push to a new view controller and have the nav bar appear as in Screen 3,4 and 5.
Hope anyone could help me with this.Thanks a lot!
In most of my applications I have a custom UIViewController class that I derive all other custom controllers from. In some of these, I added a method like navigationBarInitiallyHidden to the base class that other classes can override. The default result depends on the nature of the application.
In the delegate of the navigation controller, when a controller is being shown that implements that method, the delegate hides or shows the navigation controller accordingly. Since I animate the hide or show, I check the current state and do nothing if no change is needed.
You could do something simpler in your delegate method. If the controller being shown is the root controller, hide the navigation bar, otherwise show it if it is hidden.
- (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated {
if ( viewController == rootController ) {
[navigationController setNavigationBarHidden:YES animated:animated];
} else if ( [navigationController isNavigationBarHidden] ) {
[navigationController setNavigationBarHidden:NO animated:animated];
}
}
You can hide the navigation bar:
[self.navigationController setNavigationBarHidden:YES];
and where you want to show the navigation bar again
[self.navigationController setNavigationBarHidden:NO];
hide/disable
self.navigationController.navigationBarHidden = YES;
show/Enable
self.navigationController.navigationBarHidden = NO;
You can hide navigation bar by using bellow code. Below code will hide navigationbar at the time of viewWillAppear.
Objective C
-(void)viewWillAppear:(BOOL)animated
{
[[self navigationController] setNavigationBarHidden:YES animated:NO];
}
Swift
self.navigationController?.setNavigationBarHidden(true, animated: animated)