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];
Related
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
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
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;
I am using Master-Detail template for ipad. I have a ViewController, which I want to show modally so I have used this code
AppDelegate *appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
m_ViewController = [[ViewController alloc] initWithNibName:#"ViewController" bundle:nil];
m_ViewController.modalPresentationStyle = UIModalPresentationFormSheet;
[appDelegate.splitViewController presentModalViewController:m_ViewController animated:YES];
This works fine and the ViewController is loaded modally, Now I tried to dismiss this ViewController, So inside ViewController.m, I called this line of code
[self dismissModalViewControllerAnimated:YES];
This code also works fine and the ViewController gets dismissed, But after dismissing I want to call a function in my MasterView. How to do that?
Code added according to the discussion with Moxy.
AppDelegate *appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
[appDelegate.testViewController testfunction:testImage];
As amit3117 pointed out, you should use a delegate.
The protocol should be defined at least with a method that would communicate to the delegate that the view controller that was presented modally did finish its work.
#class ViewController;
#protocol MyViewControllerDelegate <NSObject>
-(void)viewControllerDidFinish:(ViewController *)sender;
#end
EDIT : I forgot to add that you should a public property for the delegate to ViewController
#interface ViewController : UIViewController
#property (nonatomic, weak) id <MyViewControllerDelegate> delegate;
#end
You could use your master view controller as the delegate. So in your master view controller implementation you would also have :
#interface MyMasterViewController () <MyViewControllerDelegate>
#end
#implementation MyMasterViewController
-(void)showViewController
{
m_ViewController = [[ViewController alloc] initWithNibName:#"ViewController"
bundle:nil];
m_ViewController.modalPresentationStyle = UIModalPresentationFormSheet;
m_ViewController.delegate = self;
// –presentModalViewController:animated: is deprecated!
[self.parentViewController presentViewController:m_ViewController
animated:YES
completion:nil];
}
-(void)viewControllerDidFinish:(ViewController *)sender
{
// Add any code you want to execute before dismissing the modal view controller
// –dismissModalViewController:animated: is deprecated!
[self.parentViewController dismissViewControllerAnimated:YES
completion:^{
// code you want to execute after dismissing the modal view controller
}];
}
#end
When m_ViewController finishes its work, it should call :
[self.delegate viewControllerDidFinish:self];
I have one problem. in my app (it is tabbed style), I have one viewcontroller with some text and second with table view (RSS reader). When I have just the RSS and it is set to single view app, subview form rss works, but when I set up the tabbed app and click to some post in table view, subview didnt show up... Can anybody help me please?
Here are my codes:
AppDelegate.h
#import <UIKit/UIKit.h>
#interface MWFeedParserAppDelegate : NSObject <UIApplicationDelegate> {
UIWindow *window;
UINavigationController *navigationController;
}
#property (nonatomic, retain) IBOutlet UIWindow *window;
#property (nonatomic, retain) IBOutlet UINavigationController *navigationController;
#end
AppDelegate.m
#import "MWFeedParserAppDelegate.h"
#import "ViewController1.h"
#import "RootViewController.h"
#implementation MWFeedParserAppDelegate
#synthesize window;
#synthesize navigationController;
#pragma mark -
#pragma mark Application lifecycle
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Override point for customization after app launch
UITabBarController *tbc = [[UITabBarController alloc]init];
ViewController1 *vc1 = [[ViewController1 alloc]init];
RootViewController *vc2 = [[RootViewController alloc]init];
[vc1.tabBarItem setTitle:#"Tab1"];
[vc2.tabBarItem setTitle:#"Tab2"];
[tbc setViewControllers:[NSArray arrayWithObjects:vc1, vc2, nil]];
[window addSubview:[navigationController view]];
[window makeKeyAndVisible];
[window setRootViewController:tbc];
return YES;
}
- (void)applicationWillTerminate:(UIApplication *)application {
// Save data if appropriate
}
#pragma mark -
#pragma mark Memory management
- (void)dealloc {
[navigationController release];
[window release];
[super dealloc];
}
#end
From the dealloc, I see you are not using arc.
You have some memory leaks; be sure to release vc1 and vc2 in your didFinishLaunchingWithOptions, the tab bar controller will retain them.
You probably don't need navigationController property, recommend you delete that until you know you'll need it.
I think you'll want to add your RSS view (vc2?) to a nav controller before adding to the tab bar controller like this:
[tbc setViewControllers:[NSArray arrayWithObjects:vc1, [[[UINavigationController alloc] initWithRootViewController:vc2] autorelease], nil]];
And delete this line:
[window addSubview:[navigationController view]];
Best of luck!!
edit Spelled out a tad more:
ViewController1 *vc1 = [[[ViewController1 alloc] init] autorelease];
RootViewController *vc2 = [[[RootViewController alloc] init] autorelease];
UINavigationController *navController = [[[UINavigationController alloc] initWithRootViewController:vc2] autorelease];
UITabBarController *tbc = [[[UITabBarController alloc] init] autorelease];
[tbc setViewControllers:#[vc1, navController]];
[window makeKeyAndVisible];
[window setRootViewController:tbc];