I have an application that pulls up a login page when it first starts. This login page goes over the application and does not let anyone through until they've logged in. I also have a settings tab on my main application that needs to lead back to this login screen. Right now it displays the login screen with the tab bar over it. Is there a way to get the login view over the tab bar?
I've done something similar by having views transitioning in over the top of my tab bar. I used yourView.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal; with a 'close' button to let users return to the tab bar screen. I've not done this so it automatically comes in on app fire-up but instead call the view from a button on the screen separate to the tab bar controls. However, I'm sure you'll be able to utilise this somehow to do what you want.
In fact I've actually used this way of calling up views all over my app, each time it covers the tababr and you have to 'close' it to get back to main tabbed navigation you came from.
Try setting below in your viewDidLoad of login screen:
self.tabBarController.hidesBottomBarWhenPushed = YES;
You can do this by using a subclass of UITabBarController, which then performs various checks in viewDidAppear:. The login view is modally presented, as #Maxwell suggested.
// a subclass of UITabBarController
- (void) viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
[self firstLoadChecks];
}
- (void) firstLoadChecks
{
if (!self.hasLogin) {
id login = [[[LoginViewController alloc] initWithDelegate:self autorelease];
id nav = [[[UINavigationController alloc] initWithRootViewController:login] autorelease];
nav.modalPresentationStyle = UIModalPresentationStyleFormSheet;
nav.modalTransitionStyle = UIModalTransitionStyleCoverVertical;
[self presentModalViewController:nav animated:YES];
}
}
// from LoginViewControllerDelegate
- (void) didLogin
{
self.hasLogin = YES;
[self dismissModalViewControllerAnimated:YES];
}
// my LoginViewController can be closed without a login
- (void) dismissModalViewControllerAnimated:(BOOL) animated
{
[super dismissModalViewControllerAnimated:animated];
[self firstLoadChecks];
}
Related
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 am very new to iPhone world. I am working on a view based project.MY first view have login page. when login is successful it moves to next view.
What i want to implement is that when i will be at second view. There will be a tabbarcontroller which have five tab items and first tab's view will be visisble. When i click other tabs, we will get next views accordingly.
Now, How to place a tab bar in second view only ?
Any kind of help will be highly appreciated.
Use [self presentModalViewController to show the login controller over your tabbar controller. After successfull login, just dismiss it.
You would need to create a ViewController which is a subclass of UITabBarViewController. Design the tabbar in nib or view lifecycle method of this controller.
After login present the new controller as [self presentModalViewController]
You need to implement your code as below.
First create a controller class for login.
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
[self generateLoginScreen];
[self removeLoginScreen]; // On login check implement this method or u can directly write the snippet here as well.
[self prepareControllersOnTabs]; //your tab controller code function
[self.window makeKeyAndVisible];
return YES;
}
-(void) removeLoginScreen
{
[loginScreenViewController.view removeFromSuperview];
self.window.rootViewController = self.tabBarController;
[loginScreenViewController release];
}
-(void) generateLoginScreen
{
loginScreenViewController = [[LoginScreenController alloc] initWithNibName:#"LoginScreenController" bundle:[NSBundle mainBundle]];
[self.window addSubview:self.loginScreenViewController.view];
}
Hope this is exactly what u want.
I'm implementing an application, where I show a view with a navigation item button that shows a modal view. This modal view shows a login form. In case the login is correct, I would like to go to another view thats shows a tab bar with 2 or 3 controllers.
So far, in my AppDelegate I've got:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
self.window.rootViewController = self.navigationController;
[self.window makeKeyAndVisible];
return YES; }
and then, in my RooViewController I've got:
- (void)viewDidLoad {
HomeViewController *homeController = [[HomeViewController alloc] initWithNibName:#"HomeViewController" bundle:nil];
self.controladorVistaHome = homeController;
[self.view addSubview:homeController.view];
[homeController release];
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:#"Login" style: UIBarButtonItemStyleBordered target:self action:#selector(showModalLoginForm)];
self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:#"Register" style: UIBarButtonItemStyleBordered target:self action:#selector(showModalRegisterForm)];
[super viewDidLoad]; }
When I click to the login button, it shows me a modal view with the form. Once the user logs in, I would like to show a nab bar view with some controllers.
If I modify my AppDelegate, then what I've got so far wouldn't work. Is there a way to make this work?
Thanks in advance!
Generally, a UITabBarController is the absolute root of your App & then you add UINavigationControllers to each Tab View as needed.
I'd recommend changing your self.window.rootViewController to be a UITabBarController (this will be the main hub of your app once users are logged in).
Then on first launch, if a user isn't logged in you throw up a modal View that allows them to log in OR register.
If log in is a success, dismiss the modal view. Then you'll be back at your Tab Bar ready to for the App's main use.
If a user doesn't have a log in, show ANOTHER modal view to register which will dismiss back to the original log in modal view once done (or perhaps even just log the user in automatically & thus be dismissed).
I have a UIViewController called LoginViewController. The UIViewController has two UITextField, username and password. This is displayed as a modalViewController when the first time the app is launched and there isn't any credentials in the keychain. When the user clicks on the login button the keyboard that is presented is dismissed. The code is:
- (IBAction) loginClick: (UIButton *) sender
{
if ([username isFirstResponder]){
[username resignFirstResponder];
}
if ([password isFirstResponder]){
[password resignFirstResponder];
}
[RKObjectManager sharedManager].client.username = username.text;
[RKObjectManager sharedManager].client.password = password.text;
[progressLock lock];
[progressLock unlockWithCondition:0];
[HUD showWhileExecuting:#selector(myTask) onTarget:self withObject:nil animated:YES];
[[RKObjectManager sharedManager] loadObjectsAtResourcePath:#"/account/verify.json" objectClass:[Login class] delegate: self];
}
Now inside the app there is an options button. When this is click it will present a modalViewController which has a logout button in it. Clicking on this logout button will present the LoginViewController again. The code is:
- (IBAction) logout:(id)sender
{
NSUserDefaults *standardDefaults = [NSUserDefaults standardUserDefaults];
NSString * username = [standardDefaults stringForKey:#"kApplicationUserNameKey"];
NSError * error = nil;
[standardDefaults removeObjectForKey:#"kApplicationUserNameKey"];
[SFHFKeychainUtils deleteItemForUsername:username andServiceName:#"convore" error:&error];
LoginViewController* lvc = [[LoginViewController alloc] init];
lvc.delegate = self;
[self.mgvc.groups removeAllObjects];
[self.mgvc.table reloadData];
Topic * topic = [Topic object];
topic.tid = [NSNumber numberWithInt:-2];
self.mgvc.detailViewController.topic = topic;
self.mgvc.detailViewController.detailItem = topic.tid;
[self presentModalViewController:lvc animated:YES];
[lvc release];
}
What's weird is that I can't seem to dismiss the keyboard when I click on the login button this time. Why is this? Is it because as of now I am displaying the LoginViewController from a modalviewcontroller? How do I solve this weird issue?
I don't know whether the fact that you can't dismiss the keyboard is due to presenting the login in a modal view, nor do I see anything evidently wrong with your code.
I would suggest you to change your flow and make:
the logout button dismiss your first modal view and,
your login view be displayed as a normal view, once the modal view disappears.
Explicitly, you can do 2 either by one of several means:
trying and pushing the login view controller on your navigation controller (if you have one);
selecting it in a tab bar controller (if you use one);
your modal view is shown above a view; when the modal is dismissed, that view appears again, and so the viewWillAppear selector of its view controller is called; that's the place where you can check if you are logged in or out and show the login, if necessary; if you don't know how to detect if your are in or out, you can always set a flag in the view controller when you dismiss the logout modal view.
(after reading your comment: modal view is not full screen, so viewWillAppear is not called: you can either send viewWillAppear yourself, or send a different, custom message to your superordinate view controller so that it knows that the login view should be displayed (and possibly refresh the view).
EDIT: try something like this (this requires that you call your own selector, not viewWillAppear):
[baseNonModalViewController performSelector:#selector(yourSelector) withObject:nil afterDelay:0.0];
Executing performSelector with a 0.0 delay, has only the effect of scheduling yourSelector for execution on the main loop. This way, first the modal will be completely dismissed, then the login view will be displayed.
I added a modalView to my App, everything working fine, but on closing the modal, the whole modalView jumps about 1-2 centimeters to left while it disappears.
I did not find any reason for it yet, so here is the code regarding modal:
AppController:
- (void) showNameModal:(Player *)player
{
namesModal = [[PlayerModalView alloc] init];
namesModal.delegate = self;
namesModal.player = player;
UINavigationController *navCon = [[UINavigationController alloc] initWithRootViewController:namesModal];
navCon.modalPresentationStyle = UIModalPresentationFormSheet;
[self presentModalViewController:navCon animated:YES];
[navCon release];
[namesModal release];
}
- (void)didDismissModalView
{
[self dismissModalViewControllerAnimated:YES];
}
ModalView:
- (void)dismissView:(id)sender
{
[delegate didDismissModalView];
}
called via navigation buttons as well ass via keyboard by
[self dismissView:nil];
As you can see, there is nothing special in it, could be taken from a manual actually.
What happens in detail:
Modal appears in center of screen, slides in from the bottom. centered all time.
i can handle some actions in the modalView, it stays centered.
now, dismissing the view makes it jumping to the left, than slides out.
Since it's a forced landscape-right app (currently), I was only able to notify the left-jump.
Any ideas how to get this jumping away?
Thanks
Try this,
- (void)didmissView:(id)sender
{
[self.navigationController didmissModelViewControllerAnimated:YES];
}
You are not modally presenting an instance of PlayerModalView but rather a UINavigationController. The left jerk you see is most likely the default animation of the navigation controller attempting a slide transform to the (non-existant) previous view.
It doesn't sound like you need a navigation controller for the PlayerModalView. Instead, you should create an ordinary view controller for it.
This solution seems to work well: Modal View Controller with keyboard on landscape iPad changes location when dismissed
To simplify resigning the first responder (if finding it is difficult), you can just call
[self.view endEditing:YES];
[self dismissModalViewControllerAnimated:YES];
The problem is that the UIViewController you're showing modally doesn't allow the orientation you're presenting it in, so when it disappears, it will do that in a direction that it considers "allowed".
Add this to the UIViewController for you modal view:
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return YES;
}