In Short :
How can I PushViewController from Presented ViewController ?
In Brief :
I have MainViewController, In which I have one button on click of button, I am presenting a view called LoginViewController.
On this page (LoginViewController), I again have button, on click of that, I try to push my view controller(called HomeViewController) it doesn't pushes.
Here is my code snippet,
MainViewController.m
- (IBAction)LoginClicked:(id)sender {
LoginViewController *vc = [[LoginViewController alloc] init];
[self presentViewController:vc animated:YES completion:nil];
}
LoginViewController.m
- (IBAction)buttonActionMethodOnLoginView:(id)sender{
NSLog(#"viewControllers %#",APPDELEGATE.nav.viewControllers);
//LoginViewController is not in this array
HomeViewController *obj = [[HomeViewController alloc] init];
[self.navigationController pushViewController:obj animated:YES];
}
But it did not works for me. Also, I printed a stack of view controllers before pushed, but it doesn't have LoginViewController. So, without adding LoginViewController into a stack of view controllers, How can I pushed to HomeViewController from LoginViewController ?
When I getBack from HomeViewController, then LoginViewController should get opened..
Is it possible using doing this single NavigationController?
Note:- Here, I have just taken an example using Login, Home and Main ViewController. But I want that into Other Screens.
hi when you are Presenting you Login view controller Just present a navigationController like:
LoginVC *loginVCObj =[[LoginVC alloc]initWithNibName:#"LoginVC" bundle:nil];
UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:loginVCObj];
[self presentViewController:nav animated:YES completion:nil];
Now your PresentedViewController is An navigtioncontroller
now you can simply push to your Home VC
HomeViewController *obj = [[HomeViewController alloc] init];
[self.navigationController pushViewController:obj animated:YES];
Hope it will helpful for you
LoginViewController should not be pushed to navigation controller stack. Let me describe below "why".
Our MainViewController should be on the stack - you always want to go back there.
// AppDelegate.m (only if you don't use storyboards, if you do - you don't need to copy this part of code)
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// create the window
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
[self.window setBackgroundColor:[UIColor whiteColor]];
[self.window makeKeyAndVisible];
// set view controllers
UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:[[MainViewController alloc] init]];
[self.window setRootViewController:navigationController];
}
On specific action show LoginViewController. You don't want the user to be able to tap back and go to MainViewController. Later, you won't want user to go back to LoginViewController. Because of this, you need to present it as modal:
// inside `MainViewController.m`
- (IBAction)myCoolActionToShowLogin:(id)sender {
[self presentViewController:[[LoginViewController alloc] init] animated:YES completion:nil];
}
Now we can see LoginViewController. When user completes the login, dismiss it and present HomeViewController:
// inside `LoginViewController.m`
- (IBAction)myAwesomeActionToShowHome:(id)sender {
UINavigationController *navigationController = (UINavigationController *)[UIApplication.sharedApplication.keyWindow rootViewController];
[navigationController pushViewController:[[HomeViewController alloc] init] animated:YES];
[self dismissViewControllerAnimated:YES completion:nil];
}
NOTES:
As you may notice, myAwesomeActionToShowHome: expects you have navigation controller as your rootViewController. This is working, but should be nicer - you should check if that navigation is in fact navigation controller instead of casting it. Or you may create a delegate or block to push new one. This is the fastest, easiest working solution, which should be improved later.
You really should read: Apple Developer -> "View Controller Programming" documentation, as these are the core fundamentals you should know to develop & design UX correctly.
Here is the working demo sample.
You can't push from a presented view controller. I suggest, you should maintain your navigation hierarchy.
For that, from your MainViewController, you should present LoginViewController and you should pass navigation controller for the MainViewController.
- (IBAction)openLogin:(id)sender {
LoginViewController *loginVC = (LoginViewController *) [self.storyboard instantiateViewControllerWithIdentifier:#"login"];
[loginVC setReferencedNavigation:self.navigationController];
[self presentViewController:loginVC animated:YES completion:nil];
}
Then inside LoginViewController, you should push to HomeViewController like this,
LoginViewController.h
#interface LoginViewController : UIViewController {
UINavigationController *refNavigationController;
}
- (void) setReferencedNavigation:(UINavigationController *)refNavCon;
LoginViewController.m
- (void) setReferencedNavigation:(UINavigationController *)refNavCon {
refNavigationController = refNavCon;
}
- (IBAction)openHome:(id)sender {
[self dismissViewControllerAnimated:YES completion:^{
UIViewController *homeVC = [self.storyboard instantiateViewControllerWithIdentifier:#"home"];
[refNavigationController pushViewController:homeVC animated:YES];
}];
}
By doing this, it will be look like, you're pushing from LoginViewController but in reality you're pushing from MainViewController.
You can customize this approach to maintain animation and UI for this flow.
1) present a navigation controller with itsroot view controller` set as view controller .
- (IBAction)LoginClicked:(id)sender
{
LoginViewController *loginViewController = [LoginViewController alloc] init];
UINavigationController *navController = [UINavigationController alloc] initWithRootViewController:loginViewController];
[self presentViewController:navController animated:YES completion:nil];
}
- (IBAction)buttonActionMethodOnLoginView:(id)sender
{
HomeViewController *obj = [[HomeViewController alloc] init];
[self.navigationController pushViewController:obj animated:YES];
}
Hope it will work for you.
The problem is that LoginViewController has no navigation controller. Then you give it one.
MainViewController.m
Create a UINavigationController, put LoginViewController in to the stack and present the UINavigationController.
- (IBAction)LoginClicked:(id)sender {
LoginViewController *vc = [[LoginViewController alloc] init];
UINavigationController = nav = [[UINavigationController alloc] init];
nav.viewControllers = #[vc];
[self presentViewController:nav animated:YES completion:nil];
}
LoginViewController.m
- (IBAction)buttonActionMethodOnLoginView:(id)sender{
HomeViewController *obj = [[HomeViewController alloc] init];
[self.navigationController pushViewController:obj animated:YES];
}
Dismiss
Call dismissViewControllerAnimated in your MainViewController.
For Swift 3.0
Present your view controller as a new rootViewController
let navController = UINavigationController.init(rootViewController: self.storyboard!.instantiateViewController(withIdentifier: "SignInViewController"))
self.present(navController, animated: true, completion: {})
Now push your view controller from presented view controller
self.show(self.storyboard!.instantiateViewController(withIdentifier: "SignUpViewController"), sender: self)
Create a UINavigationController instance
[[UINavigationController alloc] initWithRootViewController:[[LoginViewController alloc] init]]
Present that navigationController and then push whatever VC you want to.
MainViewController.m
- (IBAction)LoginClicked:(id)sender {
LoginViewController *vc = [[LoginViewController alloc] init];
UINavigationController *loginNav = [[UINavigationController alloc] initWithRootViewController:vc];
[self presentViewController:loginNav animated:YES completion:nil];
}
LoginViewController.m
- (IBAction)buttonActionMethodOnLoginView:(id)sender{
NSLog(#"viewControllers %#",APPDELEGATE.nav.viewControllers);
//LoginViewController is not in this array
HomeViewController *obj = [[HomeViewController alloc] init];
[self.navigationController pushViewController:obj animated:YES];
}
You have to Push from your firstView (MainViewController), but you can use animation same as PresentView and DismissView. Use following code for this :-
For Push (on MainViewController)
LoginViewController *VC = [[LoginViewController alloc]init];
CATransition* transition = [CATransition animation];
transition.duration = 0.3f;
transition.type = kCATransitionMoveIn;
transition.subtype = kCATransitionFromTop;
[self.navigationController.view.layer addAnimation:transition
forKey:kCATransition];
[[[UINavigationController alloc] initWithRootViewController:VC] pushViewController:VC animated:NO];
//[self.navigationController pushViewController:VC animated:NO];
For Pop (on LoginViewController)
CATransition* transition = [CATransition animation];
transition.duration = 0.3f;
transition.type = kCATransitionReveal;
transition.subtype = kCATransitionFromBottom;
[self.navigationController.view.layer addAnimation:transition
forKey:kCATransition];
[self.navigationController popViewControllerAnimated:NO];
Using this code, you can get animation same as Present-Dismiss ViewControllers. Refer this answer for more details.
And after that, you can use your code for Pushing LoginViewController to HomeViewController
Hope, this is what you're looking for. Any concern get back to me. :)
This is very simple code for present view controller and push view controller.
- (IBAction)LoginClicked:(id)sender {
LoginViewController *objLogicVC = [LoginViewController alloc] init];
UINavigationController *navPresent = [UINavigationController alloc] initWithRootViewController:objLogicVC];
[self presentViewController:navPresent animated:YES completion:nil];
}
- (IBAction)buttonActionMethodOnLoginView:(id)sender{
HomeViewController *objHomeVC = [[HomeViewController alloc] init];
[self.navigationController pushViewController:objHomeVC animated:YES];
}
simply put this code in objective c on button action
UIViewController *yourViewControllerName = [self.storyboard instantiateViewControllerWithIdentifier:#"yourViewControllerName "];
[[self navigationController] pushViewController:yourViewControllerName animated:YES];
So in my App.Delegate I'm doing this -
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.
self.loginViewController = [[LoginViewController alloc] initWithNibName:#"LoginView" bundle:[NSBundle mainBundle]];
UINavigationController *navigation = [[UINavigationController alloc] initWithRootViewController: self.loginViewController];
self.window.rootViewController = navigation;
self.window.backgroundColor = [UIColor whiteColor];
[self.window makeKeyAndVisible];
return YES;
}
and in my login controller I'm doing this -
- (IBAction)login:(UIButton *)sender {
NSString *username = self.userName.text;
NSString *password = self.password.text;
[AccountUtils emailLogin:username password:password useCookie:true callback:^(NSDictionary *loginResponseJSON){
if([loginResponseJSON count] != 0){
[self performSelectorOnMainThread:#selector(displaySearchController) withObject:nil waitUntilDone:YES];
// [self performSelectorOnMainThread:#selector(switchState) withObject:nil waitUntilDone:YES];
} else {
//incorrect entry info view here.
}
}];
}
- (void) displaySearchController {
SearchViewController *searchViewController = [[SearchViewController alloc] initWithNibName:#"SearchView" bundle:[NSBundle mainBundle]];
UINavigationController *navigator = self.navigationController;
[navigator popViewControllerAnimated: YES];
[navigator pushViewController: searchViewController animated:YES];
}
If I correctly login, I go to the second controller's view, but at the top I'm still allowed to go 'back' to the login page. I don't want that to happen and I thought this case would be taken care off by the popViewControllerAnimated line. How do I make it so that when I login, I am not allowed to go back to the login page?(in other words, I guess pop the login controller off the navigation controller's stack?)
If you want just to remove the loginVC you could set the new navigationController as the rootViewController of the AppDelegate after the user has logged in. So you could move the displaySearchController method in the AppDelegate and call this method (from the loginVC) after the user has logged in:
-(void)displaySearchController{
SearchViewController *searchViewController = [[SearchViewController alloc] initWithNibName:#"SearchView" bundle:[NSBundle mainBundle]];
UINavigationController *navigation = [[UINavigationController alloc] initWithRootViewController: searchViewController];
self.window.rootViewController=navigation;
}
Otherwise, if you really want the push animation, you can remove the loginVC from the navigationController viewControllers stack in the viewDidAppear of SearchDispalyController:
-(void)viewDidAppear:(BOOL)animated{
NSMutableArray *stackVCs=[self.navigationController.viewControllers mutableCopy];
int idx=[stackVCs indexOfObject:self];
//this remove the previous viewcontroller from the stack
[stackVCs removeObjectAtIndex:idx-1];
self.navigationController.viewControllers=stackVCs;
[super viewDidAppear:animated];
}
Also in the loginVC just before push the searchVC you should call this to hide the back button:
[navigation.navigationItem setHidesBackButton:YES];
You don't want to use a UINavigationController with the LoginViewController and you don't want to push the SearchViewController. Instead, use a UINavigationController with SearchViewController and when you display it, make it the rootViewController.
Do this to achieve what you want.
Move the displaySearchController method to your AppDelegate.m file
Do declare the displaySearchController method in AppDelegate.h file
Now Define the displaySearchController method in AppDelegate.m file as :
- (void) displaySearchController {
SearchViewController *searchViewController = [[SearchViewController alloc] initWithNibName:#"SearchView" bundle:[NSBundle mainBundle]];
UINavigationController *navigator = [[UINavigationController alloc]initWithRootViewController:searchViewController];
self.window.rootViewController = navigator;
}
Call a new local method showNewViewController from your loginController as :
[self performSelectorOnMainThread:#selector(showNewViewController) withObject:nil waitUntilDone:YES];
Now define showNewViewController in your loginController.m file as
-(void)showNewViewController {
AppDelegate *appDele = [UIApplication sharedApplication].delegate;
[appDele displaySearchController];
}
Don't forget to import the AppDelegate.h file to your loginController.m
This will certainly help you.
very new to obj-c.
I´ve made a simple MainViewController, loading its view from a xib. (From a standard single view template)
On the main view is a button that takes me to another view. Below is the Method:
-(IBAction)forward:(id)sender
{
tvc = [[TrackViewController alloc] initWithNibName:nil bundle:[NSBundle mainBundle]];
[self.view addSubview:tvc.view];
}
On the other view (also loaded from xib) i have a button to take me back to the main view.
Here is my IBAction for returning to the main view:
-(IBAction) back:(id)sender {
[self.navigationController popViewControllerAnimated:YES];
}
However it does not return to the main view. Not with popToRootViewControllerAnimated: either.
Any response will be appreciated!
This answer applies when you are not using UINavigationBar
In your Forward button you need to write.
TrackViewController *lf = [[TrackViewController alloc]initWithNibName:#"TrackViewController" bundle:nil];
[self presentViewController:TVC animated:YES completion:nil];
and in the Backward screen you should right.
[self dismissViewControllerAnimated:NO completion:nil];
You should load your MainViewController in your AppDelegate in an UINavigationController
MainViewController *mainVC = ...
UINavigationController *naviVC = [[UINavigationController alloc] initWithRootViewController:mainVC];
self.window.rootViewController = naviVC;
Then you can go forward in your MainViewController:
-(IBAction)forward:(id)sender;
{
tvc = [[TrackViewController alloc] initWithNibName:nil bundle:[NSBundle mainBundle]];
[self.navigationController pushViewController:tvc animated:YES];
}
and go back in your other ViewController:
-(IBAction) back:(id)sender {
[self.navigationController popViewControllerAnimated:YES];
}
If your MainViewController is inside a UINavigationController, then the forward method should look like this:
-(IBAction)forward:(id)sender
{
tvc = [[TrackViewController alloc] initWithNibName:nil bundle:[NSBundle mainBundle]];
[self.navigationController pushViewController:tvc animated:TRUE];
}
I've got an app where I am pushing a modal view controller. It is working fine, but I am concerned I haven't coded it in the most correct fashion. I have instanstiated two navigation controllers, which seems a bit dodgy to me.
Basically I've created a tab bar controller with 3 tabs, then made one of those tabs / view controllers the root. Later I am (using some home-grown markup on core text) popping a view controller when the user touches a particular word in a paragraph. The pushed view controller has a back button which works fine and the app seems to be OK.
Like I said it all works, but it seems I am coding in circles here. Is this correct?
AppDelegate.h
#import <Foundation/Foundation.h>
#interface AppDelegate : NSObject <UIApplicationDelegate, UITabBarControllerDelegate>
{
UIWindow *window;
UITabBarController *tabBarController;
}
#property (strong, nonatomic) UIWindow *window;
#property (strong, nonatomic) UITabBarController *tabBarController;
#end
From AppDelegate.m
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
ViewController *viewController = [[ViewController alloc] initWithNibName:#"ViewController" bundle:nil];
ViewController2 *viewController2 = [[ViewController2 alloc] initWithNibName:#"ViewController2" bundle:nil];
ViewController3 *viewController3 = [[ViewController3 alloc] initWithNibName:#"ViewController3" bundle:nil];
UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:viewController];
self.tabBarController = [[UITabBarController alloc] init];
self.tabBarController.viewControllers = [NSArray arrayWithObjects:nav, viewController2, viewController3, nil];
self.tabBarController.delegate = self;
self.window.rootViewController = self.tabBarController;
[self.window makeKeyAndVisible];
return YES;
}
ViewController3.h
#import <UIKit/UIKit.h>
#import "JSCoreTextView.h"
#import "PopupViewController.h"
#class JSTwitterCoreTextView;
#interface ReadingViewController : UIViewController <JSCoreTextViewDelegate>
{
JSTwitterCoreTextView *_textView;
UIScrollView *_scrollView;
}
#end
From ViewController3.m
Here I am instantiating another navigation controller. Is this a good idea?
- (void)textView:(JSCoreTextView *)textView linkTapped:(AHMarkedHyperlink *)link
{
PopupViewController *popupVC = [[PopupViewController alloc] initWithNibName:#"PopupViewController" bundle:nil];
UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:popupVC];
[nav setModalPresentationStyle:UIModalPresentationFullScreen];
[nav setModalTransitionStyle:UIModalTransitionStyleCoverVertical];
[self presentModalViewController:nav animated:YES];
}
From PopupViewController.m
- (void)viewDidLoad
{
[super viewDidLoad];
[self.navigationItem setRightBarButtonItem:[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone
target:self
action:#selector(done:)]];
}
- (void)done:(id)sender
{
[self.parentViewController dismissModalViewControllerAnimated:YES];
}
It appears the answer is "yes". I was under the impression there is a single Navigation Controller for the app, but it's more like one per tab, depending on if there are going to be further pushes from that tab.
There is a UITabBarController
- (void)getToMCGatherViewController
{
mCGatherViewController = [[MCGatherViewController alloc] initWithNibName:#"MCGatherViewController" bundle:nil];
UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:mCGatherViewController];
navigationController.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
[self presentModalViewController:navigationController animated:YES];
[navigationController release];
}
In the .h file:
#interface MCGatherViewController : UITabBarController
In the .m file . I want to change the color of the view's navigationBar
- (void)viewDidLoad
{
[super viewDidLoad];
self.navigationController.navigationBar.tintColor=[UIColor greenColor];
}
and it does not work at all.
Help me with this problem , thank you in advance!
just add
[navigationController.navigationBar setTintColor:[UIColor greenColor]];
after
UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:mCGatherViewController];
in your getToMCGatherViewController method.
Just edit your code like this and try I think this will work for you.
mCGatherViewController = [[MCGatherViewController alloc] initWithNibName:#"MCGatherViewController" bundle:nil];
UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:mCGatherViewController];
navigationController.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
[self.view addSubview:nav.view];
Then you change your Navigation Bar tint color.