I'm trying to select one of my UINavigationControllers in the UITabBar.viewControllers array.
I previously tried it with setting the UITabbarController.selectedIndex, but the Apple documentation says:
"To select the More navigation controller itself, you must change the value of the selectedViewController property instead."
AppDelegate *appDelegate = (AppDelegate*)[UIApplication sharedApplication].delegate;
UINavigationController *navController = [appDelegate.objTabBarController.viewControllers objectAtIndex:5];
[appDelegate.objTabBarController setSelectedViewController:navController];
Doing so is fine but when I change back to the MoreViewController's list view, the icon on the left side is gone and won't come back.
Everything ok, when selecting it with the finger.
Bug when selecting programmatically -> image is gone
Any suggestions what I'm doing wrong?
Best regards,
Steve
Selecting the More Navigation Controller
To select the moreNavigationController, you must set the selectedViewController:
self.tabBarController.selectedViewController = self.tabBarController.moreNavigationController;
The reason for that is simple: The moreNavigationController is not inside the viewControllers of the tab bar controller, so it can't be selected by index.
To select one of the "more" controllers directly, you can either set the selectedViewController property:
self.tabBarController.selectedViewController = viewController5;
Or you can set the selectedIndex:
self.tabBarController.selectedIndex = 5;
Fixing the Disappearing Tab Bar Image
The disappearing tab bar image is caused by using a navigation controller (for the settings) inside a navigation controller (the moreNavigationController generated by the tab bar controller). To fix it, there are two solutions:
Don't add navigation controllers for the more section, but add the controllers directly. The controller structure would look like this, assuming the controllers in all tabs need navigation:
tabBarController
+ navigationController
+ viewController0
+ navigationController
+ viewController1
+ navigationController
+ viewController2
+ navigationController
+ viewController3
+ viewController4
+ viewController5
Set the tabBarItem of the settings controller on its navigation controller (you only need to do this once):
UINavigationController *settingsNavigationController = [appDelegate.objTabBarController objectAtIndex:5];
UIViewController *settingsRootController = settingsNavigationController.viewControllers[0];
settingsNavigationController.tabBarItem = settingsRootController.tabBarItem;
I ran into this same problem. It seems that the navigation controller was somehow losing track of the view controller. In my case, the navigation controller whose image was disappearing was at index 7 in the tabBarController. The navigation controller was supposed to contain a viewController of class SettingsViewController. But sometimes it lost it.
To fix it, I had to add code to two classes -- the app delegate and SettingsViewController. In the app delegate:
-(void) fixSettingsNavigationController {
UITabBarController* tab = self.tabBarController;
NSArray* vcs = tab.viewControllers;
NSInteger nVCs = vcs.count;
if (nVCs > 7) {
UIViewController* settingsContainer = vcs[7];
UINavigationController* settingsContainerNav = (UINavigationController*)settingsContainer;
if ([settingsContainerNav isKindOfClass: [UINavigationController class]]) {
NSArray* settingsNavVCs = settingsContainerNav.viewControllers;
NSInteger count = settingsNavVCs.count;
SettingsViewController* svc = self.settingsViewController;
if (!count) {
// The container navigation controller has lost track of the settings view controller.
settingsContainerNav.viewControllers = [NSArray arrayWithObject:svc];
}
}
}
}
And in SettingsViewController:
-(void) viewWillDisappear:(BOOL)animated {
MyAppDelegate* appDel = [[UIApplication sharedApplication] delegate];
[appDel fixSettingsNavigationController];
[super viewWillDisappear: animated];
}
I ran to the very similar situation, where I want to select a View controller inside MoreViewController programmatically.
As you said in your question, apple don't allow selecting a view controller that is inside MoreViewController (Or not visible in tabbar).
In my case, I don't need default "More" features of reordering tabs in tabbar.
So, I did following things
Created a UITableViewControlelr as my 5th tab, set its Title to more and custom image (Similar to default more image).
In my UITableViewController I listed items that corresponds to ViewControllers. Tapping on which show respective view controller.
When i need to show any view controller that is inside my UITableViewController programatically, i simply set a flag and push my UITableViewController, and in viewDidAppear method of my UITableViewController push desired view controller.
This will also show back button on programatically opened view to list of MoreViewController
Related
I'm trying to add some navigation controller in my app, it's sth likes:
in my index page view controller, I try to initialize the navigation controller like this:
-(void)viewDidLoad{
...
//allocate a navigation controller.
myNavigationController = [[UINavigationController alloc]init];
myNavigationController.delegate = self;
myNavigationController.navigationBar.hidden = YES;
[self.view addSubview:myNavigationController.view];
[myNavigationController pushViewController:tabViewController animated:YES];
[self presentModalViewController:myNavigationController animated:YES];
}
Here, index page view controller is the root view controller of my app, it's just a common UIViewController here.
[myNavigationController pushViewController:tabViewController animated:YES];
The tabViewController here I've pushed into the navigation controller is a custom tabview controller which makes use of a container view to hold the tab button and also holds an navigation controller for tab switching.
The problem here is:
myNavigationController.navigationBar.hidden = YES;
since I've make the navigation bar invisible, it doesn't show when my custom view controller shows, but when I'd like to switch to some other view controller with the navigation controller and I also want the navigation bar visible:
myNavigationController.navigationBar.hidden = NO;
MyViewController *toSwitchNC = [[MyViewController alloc]init];
[myNavigationController pushViewController:toSwitchNC animated:YES];
The navigation bar would never show any more. I've also tried to put:
self.navigationController.navigationBar.hidden = NO
in MyViewController's viewDidLoad, ViewDidAppear or even in the navigation controller's delegate method, it didn't show the navigation bar neither.
So what's wrong with it? Why I initialized the navigation bar to be invisible at first, it will never show again even I set the hidden flag to be false?
Okay, I've got this fixed by removing the navigation controller container in my index page view controller. This might be a stupid question, since apple've formally stated in the developer document that the navigation view controller should be place as root as possible in the view stack. Since IOS is a closed system, who knows WTH is going on under-beneath except Apple.
I apologize I am new to iphone programming.
I have created a Master-Detail Iphone application (so Navigation Controller came with the project). I segue to a new view controller I created through a UIBarButtonItem on the masterviewcontroller. However unlike the detailviewcontroller (that came with the project) I can not seem to get the navigationitem (or navigationbar?) to display on the view even though it appears in the scene list of my storyboard.
Heres some code and a screenshot:
In my masterviewcontroller.m viewdidload() function
UIBarButtonItem *settingsButton = [[UIBarButtonItem alloc] initWithTitle:#"Settings" style:normal target:self action:#selector(goToSettings:)];
self.navigationItem.leftBarButtonItem = settingsButton;
in my masterviewcontroller.m
- (IBAction)goToSettings:(id)sender{
[self performSegueWithIdentifier:#"SettingsSegue" sender:self];
}
I tried adding a title to the navigationitem during the viewDidLoad function of the new viewcontroller.m class i created (mentioned in this Link but it didn't work)
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
self.navigationItem.title = #"Settings";
self.navigationItem.leftBarButtonItem = self.editButtonItem;
}
But it still shows up in my storyboard ( it shows up in the list under the scene but not in the display of the view)
So my question is why is it now showing up and how do I get it to? I want a back button like my detail view controller that came with the master-detail project.
EDIT#1
I have added a check for whether navigation controller is nil and it is not nil (the if statement is never entered) I also tried changing the navigation item to back and removing and none has worked.
if(self.navigationItem == nil)
{
[ self.navigationItem init];
}
self.navigationItem.title = #"Settings";
self.navigationItem.leftBarButtonItem = self.navigationItem.backBarButtonItem;
Now that I have enough reputation to show an image I can show that the navigation item shows up in the list but doesnt show up on the view
The Navigation item did not show up because of the "style" of my segue.
The segue that moved the scene from the master view controller to the settings view controller was set to 'modal'. It has to be set to 'push'. This is done from the storyboard on the utilities pane
You have to change your Segue Style by doing this:
Select the Segue in your Storyboard;
Go to the Attributes inspector (on the right pane tabs);
Change the Style attribute to Push.
It will make the screen roll from right to left and the Navigation bar will appear sliding.
With Modal, the screen come from bottom to the top of the screen and it will not let the Navigation bar appears.
The problem in my case was that the Navigation controller wasn't the "initial View Controller"
So I had to do this
You have verified that your navigation controller listed in the viewDidLoad method is not nil?
Assuming that you do correctly have a self.navigationItem that is non-nil, it appears that you are incorrectly setting your self.navigationItem.leftBarButtonItem to an editButtonItem, instead try removing this all together!
If removing it does not solve the problem try:
self.navigationItem.leftBarButtonItem = self.navigationItem.backBarButtonItem;
Please check if your view controller is the root view controller of the navigation controller. You cant directly present a view controller as a modal view controller. You have to make your view controller as the root view controller of a navigation controller and then present your navigation controller as the modal view controller.
// Create the root view controller for the navigation controller
// The new view controller configures a Cancel and Done button for the
// navigation bar.
YourViewController *addController = [[YourViewController alloc]
init];
// Configure the YourViewController.
// Create the navigation controller and present it.
UINavigationController *navigationController = [[UINavigationController alloc]
initWithRootViewController:addController];
[self presentViewController:navigationController animated:YES completion: nil];
You need to have a Navigation Controller and a View Controller.
"The navigation controller manages the navigation bar at the top of the interface and an optional toolbar at the bottom of the interface. The navigation bar is always present and is managed by the navigation controller itself, which updates the navigation bar using the content provided by its child view controllers. When the isToolbarHidden property is false, the navigation controller similarly updates the toolbar with contents provided by the topmost view controller."
https://developer.apple.com/documentation/uikit/uinavigationcontroller
The Navigation Item also appears in the View Controller Scene you can look for it there and edit it too
For the impatient:
I want to have a navigationcontroller who's root viewcontroller is a tabbarcontroller, similar to the iPad application. I am using IOS 5 and Storyboards.
For the reading inclined:
In my storyboard I have 6 tabs in a UITabBarController that is embeded in a UINavigationController, giving it a "More" button after 3 tabs are shown.
doing so gives me two navigation bars when more is pressed:
So I subclass TabBarController:
//#implentation MyTabController
- (void)viewDidLoad
{
self.moreNavigationController.wantsFullScreenLayout = NO;
self.delegate = self;
}
- (void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController
{
// hide nav bar if current controller is "More" controller
self.navigationController.navigationBarHidden =
viewController == self.moreNavigationController;
}
Great, this gives me:
My guess was that i needed to relayout the views to account for the statusbar, so i try
[self.view setNeedsLayout:YES];
but i get an error saying UIView does not contain a selector for setNeedsLayout so...
How do I get the moreNavigationController.navigationBar to account for the statusbar?
Update:
I have a second related issue with this. When I hit the "Edit" button the edit controller shows modally. Its navigationbar displays underneath the insured controller (after an animation), and does not receive touches.
Pushing a tabBarController into a NavController isn't recommended, instead set a NavigatorController for every tabBar View controller, and set the TabBarController as the main window root view controller.
If you want to be able to show a screen before showing the tabbar, a solution is to push in all the navigator controllers the previous view controller, followed by the one you want to show (that way all navbars has the backbutton). Then set hidesBottomBarWhenPushed = YES to the first view controller, that way it won't show the tabBar.
Example Code:
UIViewController *prevc = [[UIViewController alloc] init];
//prevc.hidesBottomBarWhenPushed = YES;
//Do this for every VC that will be a tabBarItem
UIViewController *vc1 = [[UIViewController alloc] init];
UINavigationController *nv1 = [[UINavigationController alloc] initWithRootViewController:prevc];
[nv1 pushViewController:vc1 animated:NO];
//Remember to set the tabBarItem!
UITabBarController *tb = [[UITabBarController alloc] init];
tb.viewControllers = [NSArray arrayWithObjects:nv1, nv2, nv3, nil];
I just realized that setting hidesBottomBarWhenPushed to the previous ViewController won't work well, but If you show prevc first, and then push the following viewController, you won't have problems. But if anyway you wan't to hide the tab bar while doing a pop, please check this:
hidesBottomBarWhenPushed but when popped
I have also faced a similar problem. In my application also, there is a Tabarcontroller inside a Navigation controller. When i try to switch to a view controller in more navigation controller programatically (like : [self.tabBarController setSelectedIndex:X]; ) the same issues appears in my application. But the following code solves my problem.
self.tabBarController.moreNavigationController.navigationBarHidden = YES;
I'm trying to present a TabBarController on top of another TabBarController. My application's MainWindow.xib looks like this:
Files Owner
First Responder
My App App Delegate
Window
TabBarContoller
+TabBar
+Nav Controller Subclass (a custom class)
+Navigation Bar
+Table View Contoller Subclass (custom class)
+Tab Bar Item
+Second View Controller (not yet hooked up)
I'm trying to display a xib file when an item is clicked in the TableView. This xib file has a TabBarController as it's main view, but when the view displays, the tab bar and navigation bar are both invisible. The code I'm using to display it is:
MyAppAppDelegate *delegate = [[UIApplication sharedApplication] delegate];
[delegate.customNavController presentModalViewController:customDetailEditViewController animated:YES];
If I use the code below to push the view controller onto the stack, I see the correct navigation bar, but the TabBar from the root view controller is shown instead of the one from the view which has been pushed.
[delegate.customNavController pushViewController:customDetailEditViewController animated:YES];
I even tried removing the TabBarController and manually implementing my own TabBar delegates but the same effect occurs (either no NavigationBar or TabBar, or the NavigationBar/TabBar from the root ViewController).
EDIT: I've uploaded the source to http://mi6.nu/tabcontroller.zip . I'd really appreciate it if someone with a bt more experience with iOS could take a look.
EDIT2: The closest I've come so far is presenting a modal view controller inside the first tabbar, so my view looks like this:
NavigationBar
[ ]
[ ]
[---View---]
[ ]
[ ]
TabBar from the pushed view
TabBar from the root view
To achieve this, I'm using:
UITabBarController *tabBarController = [[UITabBarController alloc] init];
UIViewController *directionsView = [[UIViewController alloc] init];
txtDirections = [[UITextView alloc]initWithFrame:CGRectMake(0,0,self.view.frame.size.width, self.view.frame.size.height)];
[directionsView.view addSubview:txtDirections];
IconPickerViewController *iconPicker = [[IconPickerViewController alloc]init];
tabBarController.viewControllers = [NSArray arrayWithObjects:recipeDetailEditViewController,directionsView,iconPicker, nil];
[directionsView release];
[iconPicker release];
MyAppAppDelegate *delegate = [[UIApplication sharedApplication] delegate];
[delegate.rootNavController presentModalViewController:recipeDetailEditViewController animated:YES];
This just complicates everything though, since a) It's not ideal as I have two tabbars and b) all controls (all of the editing controls) need to be in the TableViewController so their values can be loaded/saved to edit items. It would be much easier if the pushed view could handle loading/saving and appear on top of the root tabs.
Surely this must be possible?
This was an absolute nightmare, but I eventually got it working by presenting the view modally from the TableViewController when the add button is clicked:
[delegate.rootController presentModalViewController:recipeDetailEditViewController animated:YES];
delegate.rootController is the root TabBarController
The XIB file I'm presenting does not have a TabBarController, but rather a UIView, a Navigation bar and a TabBar. This appears to work when presented modally from inside a NavigationController.
Why are you putting everything in your main.xib?
Try moving the second tab bar out of the main window xib and instead put it inside the customDetailEditViewController.
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.