I'm using xCode 4.3.2 and started a blank application.
I have a navigation controller and a simple logincontroller. I want the login controller to be my root view so it is this first thing that a user does when they login.
I'm using the following code and when I run the application it displays a black screen. I put in logging in the LoginViewController.m->ViewDidLoad and it is being run is there something im doing wrong the LoginViewController.xib is very simple it just contains a button right now that will switch to a tab view controller once I figure this out.
Thanks in advance.
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions: (NSDictionary *)launchOptions
{
UIViewController *loginController = [[LoginViewController alloc] initWithNibName:#"LoginViewController" bundle:nil];
navigationController = [[UINavigationController alloc] initWithRootViewController:loginController];
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
[self.window addSubview:navigationController.view];
[self.window makeKeyWindow];
return YES;
}
This is not right:
[self.window addSubview:navigationController.view];
change it to this:
self.window.rootViewController = navigationController;
Related
I am new to iPhone development.
I created simple ViewBased Application in which, i have 2 pages Licpage and PlanPage
i have set LicPage as my RootViewController in didFinishLaunchingWithOptions,
Now when i click on button in LicPage i will navigated to PlanPage but in my PlanPage
i am unable to see my NavigationBar with back button on it.
Note: I can't drag NavigationBar manually with back button on it. because when i will add 3rd page, it will also navigate to 2nd page(PlanPage). and when i will click on back button it will take me on firstpage(LicPage) not in third page.
Try this:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
self.viewController = [[[LicAppViewController alloc] initWithNibName:#"LicAppViewController" bundle:nil] autorelease];
UINavigationController *navigationController=[[UINavigationController alloc] initWithRootViewController:self.viewController];
[self.window addSubview:navigationController.view];
[self.window makeKeyAndVisible];
return YES;
}
You need to make NavigationController in appDelegate class (delete viewController rootViewController).
And use this in .h
#property (nonatomic, retain) UINavigationController *navigationController;
in .m
#synthesize navigationController
and make object of LicPage (objLicPage) and set as rootviewcontroller for navigation controller
self.navigationController.rootViewController = objLicPage;
[self.window addSubView:navigationController.view];
[self.window makeKeyAndVisible];
I am trying to use a navigation controller to push/pop views, but I don't want the bar at the top with the buttons; I'm doing the navigation UI myself.
So I created a navigationController in my AppDelegate:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.viewController = [[WSViewController alloc] initWithNibName:#"WSViewController" bundle:nil];
self.window.rootViewController = self.viewController;
self.navController = [[UINavigationController alloc]
initWithRootViewController: self.viewController];
[self.window makeKeyAndVisible];
return YES;
}
and then in my WSViewController, I have an IBAction method that pushes another view on the navigation stack (I've verified that it's doing this correctly; I see it on the stack):
- (IBAction)showInfo:(UIButton *)sender {
if (self.wsInfoViewController == nil) {
WSInfoViewController *wic = [[WSInfoViewController alloc] initWithNibName:#"WSInfoViewController" bundle:nil];
self.wsInfoViewController = wic;
}
[self.navigationController pushViewController:self.wsInfoViewController animated:YES];
}
But I'm not seeing the info view show up when I tap on the info button in my WSViewController (which is showing up just fine).
If I make the navigationController the root controller, then I do see the wsInfoViewController when I tap on the info button, however, I also get the navigation bar at the top, which I don't want!
So... first, am I wrong in thinking I can use a navigation controller this way (i.e. using it for stack purposes but not for any UI at all)?
Second, if I'm not wrong, why isn't the view I'm pushing onto the stack showing up? I'm guessing it's because I'm not hooking the navigation controller up to the window correctly, but I'm not sure how to do that.
Thanks!!!
Elisabeth
So I think I have the answer to my question. Which is, you must set up the navigation controller as the root view controller for the AppDelegate window in order to use it, otherwise, the window doesn't know about it. My WSViewController is still the root view controller for the navigation controller. And then to get rid of the navigation bar, you can hide it.
Here's the updated code:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.viewController = [[WSViewController alloc] initWithNibName:#"WSViewController" bundle:nil];
// doesn't work!
//self.window.rootViewController = self.viewController;
self.navController = [[UINavigationController alloc]
initWithRootViewController: self.viewController];
// do this instead
self.window.rootViewController = self.navController;
[self.window makeKeyAndVisible];
return YES;
}
To hide the nav bar in the views, in each view where you want it hidden, add the following methods:
- (void) viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
[self.navigationController setNavigationBarHidden:YES animated:animated];
}
- (void) viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
[self.navigationController setNavigationBarHidden:NO animated:animated];
}
This is working great so far!
i have a tabBarController application and using .xib files for the interface not the storyboard
i have this code by default in the appdelegate
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.
UIViewController *viewController1 = [[PopAdsFirstViewController alloc] initWithNibName:#"PopAdsFirstViewController" bundle:nil];
UIViewController *viewController2 = [[PopAdsSecondViewController alloc] initWithNibName:#"PopAdsSecondViewController" bundle:nil];
self.tabBarController = [[UITabBarController alloc] init];
self.tabBarController.viewControllers = [NSArray arrayWithObjects:viewController1, viewController2, nil];
self.window.rootViewController = self.tabBarController;
[self.window makeKeyAndVisible];
return YES;
i have created a Login View and don't know how to show it before the tabBarView and hide t after a successful login.
One way would be to show it as a modalView on launch. Dismissing upon successfull login?
eg:
UIViewController myLoginViewController = [[MyLoginViewController alloc] init withNibNamed:"MyLoginViewController"]; //Or whatever you instantiation is
[myTabViewController presentModalViewController:myLoginViewController animated:YES];
And to dismiss it (Hide it)
//This should be done from the original View Controller i.e. myTabViewController preferably in a delegate called by the modal view controller.
[self dismissModalViewControllerAnimated:YES];
Documentation on modalViewControllers:
http://developer.apple.com/library/ios/#featuredarticles/ViewControllerPGforiPhoneOS/ModalViewControllers/ModalViewControllers.html
The way that I did it for one of my apps is to just add them in the correct order. Add your tabbar controller to your window, then add the login controller over the top of the tab bar. Then show your window. The user won't see anything but your login controller. Once you login, you can just remove the login controller from view.
This way is probably best if you have information you need to hide until login. The other way is to only launch the login view only. On successful login, remove the login and add the tab bar controller. Either way is fine.
Presenting modally is probably the easiest, but requires a view in place before presenting. So if the data and view under the login controller isn't that sensitive, you could consider this option.
Another way would be using LoginViewControllerDelegate in your appDelegate.h file
In your .h
#import "yourLoginViewController"
//and add LoginViewControllerDelegate
Then in your .m
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
yourLoginViewController *loginView = [[yourLoginViewController alloc] initWithNibName:#"yourLoginViewController" bundle:nil];
loginView.delegate = self;
[window addSubview:loginView.view];
[window makeKeyAndVisible];
}
//add this one
- (void)loginViewControllerDidFinish:(yourLoginViewController *)loginViewController {
[window addSubview:tabBarController.view];
}
I set up my app a while ago using a tutorial for setting up the navigationbar in interface builder, but no longer use interface builder in any of my app and would much like to change this 1 thing which does use interface builder to being coded in. So my question is, I have a navigationbar which works, and which appears on the first view of my app, HomeView. How would I make this happen just as it does now, programmatically?
In the AppDelegate.m file, add this:
- (BOOL)application:(UIApplication *)application
didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
RootViewController *rootViewController = [[RootViewController alloc] init];
UINavigationController *navController = [[UINavigationController alloc]
initWithRootViewController:rootViewController];
[window addSubview:[navController view]];
[self.window makeKeyAndVisible];
}
Be sure to add #import "RootViewController.h" at the top of the file.
Another way of adding the navigation bar programmatically, change the application:didFinishLaunchingWithOptions method of your app delegate like:
- (BOOL)application:(UIApplication *)application
didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
RootViewController *rootViewController = [[RootViewController alloc] init];
UINavigationController *navController = [[UINavigationController alloc]
initWithRootViewController:rootViewController];
self.window.rootViewController = navController;
[self.window makeKeyAndVisible];
}
I have noticed that when you create a new xcode project as a view based application it creates a view NIB and when that NIB is loaded it loads below the menu bar. I am trying to create a window based application and programmatically add a view to the window, but the view gets loaded underneath the menu bar so part of the view is being obstructed.
i have tried
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Override point for customization after application launch.
MYViewController *viewController = [[MYViewController alloc] initWithNibName:#"MYViewController" bundle:nil];
[window addSubview:viewController.view];
[window makeKeyAndVisible];
return YES;
}
and i have also tried changing the "wantsFullScreenLayout" property of the view controller to FALSE;
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Override point for customization after application launch.
MYViewController *viewController = [[MYViewController alloc] initWithNibName:#"MYViewController" bundle:nil];
viewController.wantsFullScreenLayout = NO;
[window addSubview:viewController.view];
[window makeKeyAndVisible];
return YES;
}
any help would be appreciated
Thanks
found it!
[MYViewController.view setFrame:[[UIScreen mainScreen] applicationFrame]];