UITabBarController on iOS8 broken for smaller screens - ios

It seems using UITabBarController on 3,5inch screens is causing problems since IOS8.
I'm using the UITabBarController as a root controller, each tab has its own viewController. The issue is when returning from a modal viewController, the tabBar disappears.
This only occurs on IOS8 with a smaller screen (3,5inch) and has always worked on older versions of IOS.
Anyone an idea how to fix this?
//AppDelegate.h
#property (nonatomic, strong) IBOutlet UITabBarController *tabBarController;
#property (nonatomic, strong) IBOutlet UIWindow *window;
//-----------------------------------------------
//AppDelegate.m
UITabBarController *tabBarController = [[UITabBarController alloc] init];
tabBarController.delegate = self;
tabBarController.view.frame = [[UIScreen mainScreen] applicationFrame];
//Set each tab to show an appropriate view controller
[tabBarController setViewControllers:[NSArray arrayWithObjects:mainViewController,aViewController,bViewController, nil]];
self.tabBarController = tabBarController;
self.window.rootViewController = self.tabBarController;
// Finally, add the tab controller view to the parent view
[window addSubview:self.tabBarController.view];
self.window.rootViewController = self.tabBarController.navigationController;
[window makeKeyAndVisible];
//-----------------------------------------------
//launching a modal viewController from the mainViewController
UINavigationController *navController = [[UINavigationController alloc]initWithRootViewController:listViewController];
[self presentViewController:navController animated:YES completion:nil];
//dismissing the modal viewController
//listViewController.m
[self dismissViewControllerAnimated:YES completion:nil];
//after returing to the mainViewController the tabBar at the bottom of the screen just dissapears

Related

Changing root view controller in the background

I have the following view controllers stack.
First, my app will show an app tour page. (Say TourViewController - super class is UIViewController). Added this controller in AppDelegate as rootviewcontroller.
self.window.rootViewController = tourViewController;
Then from the tour page, if the user taps on "Signin" button, I'm presenting the second view controller (Say LoginViewController - super class is UIViewController).
UINavigationController *loginNavigationController = [[UINavigationController alloc] initWithRootViewController:self.loginViewController];
[self presentViewController:loginNavigationController animated:YES completion:nil];
After a successful login, I need to resign the second view controller (LoginViewController) and want to show a tab bar based view for further needs.
I tried this code inside the login success method.
[self dismissViewControllerAnimated:YES completion:^{
TabBarViewController *tabController = [[TabBarViewController alloc] init];
[self presentViewController:tabController animated:NO completion:nil];
AppDelegate *applicationDelegate = [[UIApplication sharedApplication] delegate];
applicationDelegate.window.rootViewController = tabController;
}];
Problems:
When I'm in the LoginViewController, I have two view controllers in my stack. So even I resign the LoginViewController, the another one (TourViewController) remains in the screen.
If I tried the above code, tab bat controller was successfully added as root view controller. But, when the LoginViewController resigns, the background was filled by TourViewController
What I need is, When I resign the LoginViewController, the background view should be tab bar controller instead of TourViewController.
Help needed!!
u can change the root view controller in AppDelegate not in the success method of the loginNavigationController better u can do this way
in AppDelegate.h
#import <UIKit/UIKit.h>
#import "TabControllerViewController.h"
#interface AppDelegate : UIResponder <UIApplicationDelegate>
#property (strong, nonatomic) UIWindow *window;
- (void)showTabController; //add this method call from on success method of log in completion
#end
in AppDelegate.m
- (void)showTabController;
{
TabControllerViewController *tabController = [[TabControllerViewController alloc] initWithNibName:#"TabControllerViewController" bundle:nil];
self.window.rootViewController = tabController;
[self.window makeKeyAndVisible];
}
and in loginNavigationController.m
[self dismissViewControllerAnimated:YES completion:^{
//TabBarViewController *tabController = [[TabBarViewController alloc] init];
// [self presentViewController:tabController animated:NO completion:nil]; //no nee to present
AppDelegate *applicationDelegate = [[UIApplication sharedApplication] delegate];
[applicationDelegate showTabController]; //there is no need to create a tab bar in loginview controller, create it in root view controller
//applicationDelegate.window.rootViewController = tabController;
}];
NOTE: above is not tested just try it once
Edit 1
one way u can do it but with different animation,
form this answer u can change to second window by doing some animation for example
in in AppDelegate.h
#import <UIKit/UIKit.h>
#import "TabViewController.h"
#import "LoginViewController.h"
#interface AppDelegate : UIResponder <UIApplicationDelegate>
#property (strong, nonatomic) UIWindow *window; //holds initial window, holds tour and login controller
#property (strong, nonatomic) UIWindow *tabWindow; //holds only tab controller
//..other code below is my test
#property (strong, nonatomic) TabViewController *tabViewController;
#property (strong, nonatomic) LoginViewController *loginController;
- (void)showTabController;
#end
in AppDelegate.m
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
_tabWindow = [[UIWindow alloc]initWithFrame:[UIScreen mainScreen].bounds];
_window = [[UIWindow alloc]initWithFrame:[UIScreen mainScreen].bounds];
// Override point for customization after application launch.
_loginController = [[LoginViewController alloc]initWithNibName:#"LoginViewController" bundle:nil];
_tabViewController = [[TabViewController alloc] initWithNibName:#"TabViewController" bundle:nil];
self.window.rootViewController = _loginController; //for test for your case it contains tour view controller
[self.window makeKeyAndVisible];
return YES;
}
- (void)showTabController;
{
[UIView transitionWithView:self.window duration:0.5 options:UIViewAnimationOptionTransitionFlipFromLeft animations:^{
self.window.rootViewController = _tabViewController;
} completion:^(BOOL finished) {
// [_tabWindow makeKeyAndVisible];
}];
}
Do one thing,
Create UINavigationController in AppDelegate.h so you can access it anywhere.
Logic
Whenever you need to change navigation controller you must have to put your Controller to Navigation stack.
So first of all you have to create ViewController/ Tabbarcontroller object and assign it to navigationController and then show the navigationController.
AppDelegate* myDelegate = (((AppDelegate*) [UIApplication sharedApplication].delegate));
InitialViewController *initialVC = [self.storyboard instantiateViewControllerWithIdentifier:#“InitialVC"];
myDelegate.navController = [[UINavigationController alloc] initWithRootViewController:initialVC];
myDelegate.window.rootViewController = myDelegate.navController;
[myDelegate.window makeKeyAndVisible];

navigation controller pushViewController not working

I'm creating an application that has 2 main view controllers at the moment. The app loads into the initial viewController, and clicking a button inside should bring up the second viewController. Here's what I have:
AppDelegate.h
#import <UIKit/UIKit.h>
#import "ViewController1.h"
#interface AppDelegate : UIResponder <UIApplicationDelegate>
#property (strong, nonatomic) UIWindow *window;
#property (strong, nonatomic) ViewController1 *mainViewCtr;
#property (strong, nonatomic) UINavigationController *navigationController;
#end
AppDelegate.m
- (void)applicationDidFinishLaunching:(UIApplication *)application {
_mainViewCtr = [[ViewController1 alloc] initWithNibName:#"mainViewCtr" bundle:nil];
_navigationController = [[UINavigationController alloc] initWithRootViewController:_mainViewCtr];
_window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
_window.rootViewController = _navigationController;
_navigationController.delegate = self;
_navigationController.navigationBarHidden = YES;
[_window addSubview:_navigationController.view];
[self.window makeKeyAndVisible];
}
and my button method inside viewcontroller1:
- (IBAction)SessionNickNameSubmit:(id)sender {
ViewController2 *secondViewCtrl = [[ViewController2 alloc] initWithNibName:#"secondViewCtrl" bundle:nil];
[self.navigationController pushViewController:secondViewCtrl animated:YES];
}
but when I click the button the view doesn't change. I tried debugging and the code is hit, but nothing happens.
am I missing a setting somewhere?
UPDATE
I've updated all viewController variable names:
instead of ViewController1/2 I'm using mainViewCtrl and secondViewCtrl
but still no use :(
You made a typo:
it's
_window.rootViewController = _navigationController;
not
_window.rootViewController = _joinViewController;
And NeverHopeless's suggestion is also spot on. It's probably the typo AND the fact that you add your second viewcontroller as ViewController2 and not using a proper variable name.
Another suggestion is making a storyboard (if you are not using one) and adding a segue for the transition. Simply assign the segue processing to the button. Like this:
-(IBAction)SessionNicknameSubmit:(id)sender
{
[self performSegueWithIdentifier:#"identifier" sender:self ];
}
Here is a nice description of how it works and how to use it plus some useful pointers!
Obj-C is a case sensitive language, class name and instance name should not be the same like ViewController2. Try like this:
- (IBAction)SessionNickNameSubmit:(id)sender {
ViewController2 *viewController2 = [[ViewController2 alloc] initWithNibName:#"ViewController2" bundle:nil];
[self.navigationController pushViewController:viewController2 animated:YES];
}
The reason is that you have set the window's rootViewController to ViewController1.
You need to set you navigation controller to the window's rootViewController.
So that when you try to access the self.navigationController on the press of the button, it will access the navigation controller in which the self resides i.e. your window's rootViewController now.
Then it will push the next view controller properly.
After looking at almost every tutorial and every stack overflow answer, I finally found a solution that worked. I had to make an instance of the storyboard in the app delegate and use that to create my first view controller instance.
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
self.storyboard = [UIStoryboard storyboardWithName:#"Main" bundle:nil];
self.joinViewController = [self.storyboard instantiateViewControllerWithIdentifier:#"ViewController1"];
UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:joinViewController];
_window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
navigationController.navigationBarHidden = YES;
_window.rootViewController = navigationController;
[_window addSubview:navigationController.view];
[self.window makeKeyAndVisible];
return YES;
}
I think the problem was that when I was creating an instance of ViewController, it was creating a new instance and binding the navigation controller to it (independent of the view controller that was showing up in the simulator). So when I was using the push method it wasn't recognizing self.NavigationController (that's why NSLog(self.NavigationController == nil) was logging 1

Losing left menu when going back PKRevealController

I'm implementing PKRevealController in an existing project. This project uses Storyboards, but user is able to play Cocos2D 2.0 game within the app.
My problem is that when user goes out of Cocos2D, I use a notification (notification center) on my navigation controller (that controls the Cocos2D game) to segue to my main view, but when it does the segue the PKRevealController doesn't work anymore.
I implement the PKReveal on my AppDelegate, so I suppose I should (somehow) implement it somewhere i can re-implement it when i exit a Cocos2d game.
Any ideas? Thank you!
If anyone has the same problem, there's how I solved this problem:
Created a new UIViewController in Storyboard, and embed it in a NavigationCotroller
Created my InitialViewController for this new ViewController and implemented both <PKRevealing, UIApplicationDelegate>.
Created thise properties in it:
#property (nonatomic, strong) PKRevealController *revealController;
#property (strong, nonatomic) UINavigationController *myNavController;
#property (strong, nonatomic) UIWindow *window;
On viewDidLoad did self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]]; (like on my AppDelegate)
Finally on viewDidAppear method:
FrontViewController *frontViewController = [[UIStoryboard storyboardWithName:#"Main" bundle:nil] instantiateViewControllerWithIdentifier:#"FrontViewController"];
PortraitAppNavigationController *frontNavigationController = [[PortraitAppNavigationController alloc] initWithRootViewController:frontViewController];
LeftMenuViewController *leftViewController = [[UIStoryboard storyboardWithName:#"Main" bundle:nil] instantiateViewControllerWithIdentifier:#"LeftMenu"];
// Step 2: Instantiate.
self.revealController = [PKRevealController revealControllerWithFrontViewController:frontNavigationController leftViewController:leftViewController];
// Step 3: Configure.
self.revealController.delegate = self;
self.revealController.animationDuration = 0.25;
// Step 4: Apply.
self.window.rootViewController = self.revealController;
[self.window makeKeyAndVisible];

Not understanding how the NavigationController and UIViewControllers are working in iOS

I have a project which I don't really understand the views and navigation behind. I start out in the AppDelegate (MAAppDelegate), where I define properties:
#property (strong, nonatomic) UIWindow *window;
#property (strong, nonatomic) UIViewController *detailViewController;
Then in the MAAppDelegate.m, I create a navigationController, and
#implementation MAAppDelegate
#synthesize detailViewController;
#synthesize window;
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Init the navController for the Master Detail View of the grade cells
UINavigationController *navController = [[UINavigationController alloc] init];
detailViewController = [[UIViewController alloc] init];
UIViewController *viewController = [[MAController alloc] init];
navController = [[UINavigationController alloc] initWithRootViewController:viewController];
self.window.rootViewController = viewController;
[self.window makeKeyAndVisible];
return YES;
}
So at this point, I think I have a working naviationController, I've setup an instance of a custom UIViewController (custom class MAController) and I've set it up as the rootViewController.
Then, in my MAController class, the class where I do all of my UI stuff (the entire UI is done programmatically, no nibs or storyboards). Here is a bit of the viewDidLoad of MAController:
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
[self.navigationController setNavigationBarHidden:YES]; // I commented this line out and realized it does nothing
I go on (in viewDidLoad) to add a bunch of subviews to self.view, like this
[self.view addSubview:self.backgroundImageView];
Earlier, I created a viewController in the AppDelegate class and it was called view, so I assumed it was refereeing to that but now since I've changed it (in AppDelegate) to viewController, I guess I was thinking wrong?
And then finally, I create a UIView in 'viewDidLoad`:
UIView *header = [[UIView alloc] initWithFrame:headerFrame];
header.backgroundColor = [UIColor clearColor];
self.tableView.tableHeaderView = header;
and start adding a bunch of subviews to this new UIView I created header.
So, in short, I have no idea what is happening. Later, when I tried telling (from a method inside MAController) self.navigationController (which I assumed to be navigationController in charge of everything in my project - created at the beginning in the AppDelegate) to pushViewController a new viewController that I was going to use as a detailView for a table, it got weird.
So I'm just trying to understand what has control, and what the rootViewController is, and just what is happening.
The main window root is set to a view controller and not the navigation controller
Change:
self.window.rootViewController = viewController;
to:
self.window.rootViewController = navController;
EDIT:
You can access the navigationController from anywhere by asking your appDelegate. It is normally not considered a good practice:
MAAppDelegate *delegate = (MAAppDelegate *)[[UIApplication sharedApplication] delegate];
UINavigationController *nav = delegate.navigationController;
Don't forget to:
#import "MAAppDelegate.h"
First, take a little time and read through how navigation controllers work. The documentation is really helpful:
https://developer.apple.com/library/ios/documentation/uikit/reference/UINavigationController_Class/Reference/Reference.html
Second, your problem is that your window's root view controller is not the navigation controller you created. Rather it is an instance of MAController. This is what you're doing:
UIViewController *viewController = [[MAController alloc] init];
// some other code ...
self.window.rootViewController = viewController;
I think you meant to add MAController as the root view controller of the navigation controller and make the navigation controller your window's root. If so, you'll want to set your view controllers up like this:
UIViewController *viewController = [[MAController alloc] init];
UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:viewController];
self.window.rootViewController = navController;
Another potential problem is that you don't seem to be doing anything with your detailViewController. Maybe that's confusing you too.

Call NavigationController (xib) from ViewController (storyboard)

I'm normally just use storyboard for my iOS, but needed to integrate an SDK which does not use storyboard, rather xib. My initial view controller is from storyboard, and when a button is pushed (IBAction), I would like it to go to the xib view controller, but not sure how programmatically to do so. Here is my AppDelegate:
//AppDelegate.m
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:...{
// set to storyboard on launch
UIStoryboard *mainStoryboard = [UIStoryboard storyboardWithName:#"iPhoneStoryboard"
bundle: nil];
UIViewController* viewController = [mainStoryboard instantiateInitialViewController];
[self.window setRootViewController:viewController];
[window makeKeyAndVisible];
return YES;
}
Here is my code .h:
//mainVC.h
#import <UIKit/UIKit.h>
#interface MainVC : UIViewController{
UIWindow *window;
UINavigationController *navigationController;
}
#property (nonatomic, retain) IBOutlet UIWindow *window;
#property (nonatomic, retain) IBOutlet UINavigationController *navigationController;
#property (nonatomic, retain) IBOutlet UIButton *buttonScan;
-(IBAction) ActionScan;
#end
And the .m:
//mainVC.m
#interface MainVC ()
#end
#implementation MainVC
#synthesize window;
#synthesize navigationController;
#synthesize buttonScan;
- (IBAction)ActionScan{
window.rootViewController = navigationController;
[window makeKeyAndVisible];
}
create instance of your xib viewController with initWithNibName
MyViewController *controller = [[MyViewController alloc] initWithNibName:#"MyViewController" bundle:nil];
& then push this controller instance on navigation controller
[self.navigationController pushViewController:desController animated:YES]
In the view controller in storyboard, code below:
alloc & init destination view controller:
UIViewController *desController = [[SomeViewController alloc]init];
show the destination view controller:
[self.navigationController pushViewController:desController animated:YES]
or
[self.navigationController presentViewController:desController animated:YES completion:nil
Usually you don't set the window's rootViewController directly. Instead you should use
- (IBAction)ActionScan{
[self presentViewController:self.navigationController animated:YES completion:nil];
}
to show your next view controller. The first and accepted answer to this question gives a more detailed explanation of how this works.
Changing root view controller of a iOS Window
Setting window.rootViewController and calling [window makeKeyAndVisible] usually happens in your app delegate, but since you're using storyboards, it is done for you under the hood.
Also, unless you're using multiple windows, you can access your UIWindow from anywhere using your app delegate singleton object.
MyAppDelegateClass *appDelegate = (MyAppDelegateClass*)[[UIApplication sharedApplication] delegate];
UIWindow *mainWindow = appDelegate.window;

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