I need to show a ViewController from the appDelegate every time the app comes from the background in the applicationDidEnterBackground method.
The *securityCheck prompts the user for a passcode very much like the normal passcode in iOS. Once the passcode is validated I call dimissViewControllerAnimated inside the securityCheck and I am left with my blank UINavigationController, since the view was presented from the appDelegate I have no record of who presented the view, so I can't popToRootViewController.
My question is how can I properly dismiss the SecurityCheckViewController so that it shows the ViewController which the user was on before the app entered the background.
Here's my code:
This method is called inside AppDelegate.m
- (void)securityCheck {
SecurityCheckViewController *securityCheck = [[SecurityCheckViewController alloc] init];
UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:securityCheck];
[securityCheck presentedByAppDelegate:YES];
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
[self.window setRootViewController:navigationController];
[self.window makeKeyAndVisible];
}
Then inside the SecurityCheckViewController.m I have
- (void)unlockWasSuccessfulForPadLockScreenViewController:(ABPadLockScreenViewController *)padLockScreenViewController {
[self.appDelegate securityCheckDone];
[padLockScreenViewController dismissViewControllerAnimated:YES completion:nil];
NSLog(#"Sucsessfull Unlock");I'm
}
Present
- (void)securityCheck {
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"Main_iPhone" bundle:nil];
SecurityCheckViewController *securityCheck = [storyboard instantiateViewControllerWithIdentifier:#"securityCheckView"];
[self.window.rootViewController presentViewController:securityCheck animated:NO completion:nil];
}
Dismiss
[self dismissViewControllerAnimated:YES completion:nil];
You can call this from application:didFinishLaunchingWithOptions
NOTE: All the storyBoard "initialViewControllers" tick box on the property inspector is turned off
UIStoryboard *storyboard =
[UIStoryboard storyboardWithName:#"Registration" bundle:nil];
RegisterViewController *vc = [storyboard instantiateViewControllerWithIdentifier:#"RegisterViewController"];
//this is key else you get a black screen
self.window = [[UIWindow alloc] initWithFrame:UIScreen.mainScreen.bounds];
self.window.rootViewController = vc;
[self.window makeKeyAndVisible];
Related
My MainViewController loads another view modally.
#implementation MainViewController
- (void)viewDidLoad {
[super viewDidLoad];
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"Main" bundle:nil];
UIViewController *uiViewController = [storyboard instantiateViewControllerWithIdentifier:#"splashViewController"];
[uiViewController setModalPresentationStyle:UIModalPresentationCustom];
[uiViewController setModalTransitionStyle:UIModalTransitionStyleCrossDissolve];
[self presentViewController:uiViewController animated:YES completion:nil];
}
When I load the MainViewController directly from the AppDelegate, the modal view is loaded.
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
UIViewController *rootController = [[RootViewController alloc] init];
navigationController = [[UINavigationController alloc] initWithRootViewController:rootController];
[navigationController setNavigationBarHidden:true];
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
[self.window setRootViewController:navigationController];
[self.window makeKeyAndVisible];
return YES;
}
If I load the MainViewController as a child controller of another controller, then the modal view fails to load.
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
self.drawerViewController.leftViewController = self.leftDrawerViewController;
self.drawerViewController.centerViewController = self.mainViewController;
self.drawerViewController.animator = self.drawerAnimator;
UIViewController *rootController = self.drawerViewController;
navigationController = [[UINavigationController alloc] initWithRootViewController:rootController];
[navigationController setNavigationBarHidden:true];
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
[self.window setRootViewController:navigationController];
[self.window makeKeyAndVisible];
return YES;
}
The main view still loads. It's only that the modal view is not created.
What's causing the problem and how can I resolve this?
You should not present another view controller from viewDidLoad method ,
by that time , current view is NOT finished with its view-hieararchy changes ,
You can present new viewcontroller after viewDidAppear is called ,
so you can move that code to viewDidAppear
I have embedded APNS to my app and I navigate to a screen where I have details of the notification. The problem is, when clicked on the view button in the alert view, the app navigates to the .xib file and freezes.
What can I do to workaround this?
Heres the code used to open the viewController xib:
RearTableViewController *rearView = [[RearTableViewController alloc]initWithNibName:#"RearTableViewController" bundle:nil];
DetailsViewController *detailsViewController = [[DetailsViewController alloc]initWithNibName:#"Details" bundle:nil];
detailsViewController.messageID = [[[NSUserDefaults standardUserDefaults] objectForKey:#"messageId"] intValue];
UINavigationController *frontNavigationController = [[UINavigationController alloc] initWithRootViewController:detailsViewController];
UINavigationController *rearNavigationController = [[UINavigationController alloc] initWithRootViewController:rearView];
SWRevealViewController *mainRevealController = [[SWRevealViewController alloc]
initWithRearViewController:rearNavigationController frontViewController:frontNavigationController];
mainRevealController.delegate = self;
self.window.rootViewController = mainRevealController;
This may Help you.
self.window = [[UIWindow alloc]initWithFrame:[[UIScreen mainScreen] bounds]];
SplashVC *rootVC = [[SplashVC alloc]initWithNibName:#"SplashVC" bundle:nil];
UINavigationController *navigation = [[UINavigationController alloc]initWithRootViewController:rootVC];
[navigation setNavigationBarHidden:YES];
self.window.rootViewController = navigation;
[self.window makeKeyAndVisible];
This is my code when i receive push and show alert. If alerts one of the button pressed then this will present my view controller.
LocationViewController *locationVC = [storyboard instantiateViewControllerWithIdentifier:#"LocationVC"];
locationVC.latitude = fLat;
locationVC.longitude = fLong;
[self.navController presentViewController:locationVC animated:YES completion:nil];
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.
I would like to show a modal dialog from a xib. The code that shows my window is:
self.vcSettings = [[ViewControllerSettings alloc] initWithNibName:#"ViewControllerSettings" bundle:[NSBundle mainBundle]];
[self presentModalViewController:self.vcSettings animated:YES];
When this runs though, I get a blank screen, and not what was inside of my ViewControllerSettings.xib. I imagine I'm showing the view incorrectly somehow. Any advice is appreciated.
EDIT:
I think this should be
[self.navigationController presentModalViewController:self.vcSettings animated:YES];
but for some reason self.navigationController is nil.
EDIT:
Self is a UIViewController instantiated in my AppDelegate like so:
UIViewController* viewMain = [[ViewController_iPhone alloc] initWithNibName:#"ViewController_iPhone" bundle:nil];
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.
self.window.backgroundColor = [UIColor whiteColor];
self.window.rootViewController = viewMain;
[self.window makeKeyAndVisible];
You need to create a UINavigationController, set it's root view to the XIB controller that you want to present (in your case vcSettings), then present the UINavigationController
self.vcSettings = [[ViewControllerSettings alloc] initWithNibName:#"ViewControllerSettings" bundle:nil];
UINavigationController *controller = [[UINavigationController alloc] initWithRootViewController:vcSettings];
[self.navigationController presentModalViewController:controller animated:YES];
I'm new to UISplitView development, so I'm sure there is something obvious I'm doing wrong. I have a basic UISplitView iPad app that loads up with two UITableView controllers when the app launches. This works just fine.
What I am trying to do is immediately upon launch, presenting an "authentication" view modally so that a user will need to login before continuing. Here is the code I have so far which compiles and works without breaking, but the view is not showing.
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
MasterViewController *masterViewController = [[MasterViewController alloc] initWithNibName:#"MasterViewController" bundle:nil];
UINavigationController *masterNavigationController = [[UINavigationController alloc] initWithRootViewController:masterViewController];
DetailViewController *detailViewController = [[DetailViewController alloc] initWithNibName:#"DetailViewController" bundle:nil];
UINavigationController *detailNavigationController = [[UINavigationController alloc] initWithRootViewController:detailViewController];
self.splitViewController = [[UISplitViewController alloc] init];
self.splitViewController.delegate = detailViewController;
self.splitViewController.viewControllers = [NSArray arrayWithObjects:masterNavigationController, detailNavigationController, nil];
masterViewController.detailViewController = detailViewController;
masterViewController.managedObjectContext = self.managedObjectContext;
self.window.rootViewController = self.splitViewController;
[self presentAuthenticate];
[self.window makeKeyAndVisible];
applicationDidLaunch = YES;
return applicationDidLaunch;
}
- (void) presentAuthenticate {
AuthenticateViewController *loginController = [[AuthenticateViewController alloc] initWithNibName:#"AuthenticateViewController" bundle:nil];
[loginController setModalTransitionStyle:UIModalTransitionStyleCoverVertical];
[loginController setModalPresentationStyle:UIModalPresentationFormSheet];
if ([self.splitViewController respondsToSelector:#selector(presentViewController:animated:completion:)]) {
[self.splitViewController presentViewController:loginController animated:NO completion:nil];
} else {
[self.splitViewController presentModalViewController:loginController animated:NO]; //iOS 4 works fine with or without animation
}
}
I defined the AuthenticateViewController as a View with a few textfields in it and have it wired to the File's Owners view.
Thanks ahead of time!
A viewcontroller will not allow to push/present on anotherview unless and until the view is complete loading.
Simple saying we are not allow to call presentModalViewController/pushViewController in a viewcontroller viewDidLoad/viewWillAppear. we need to call this in viewDidAppear.
I had the same issue you said.
Some Solution I can say are,
Do the loading of AuthenticateViewController after [self.window makeKeyAndVisible]; and in a performSelctor (may be with a delay).
Move the code to display AuthenticateViewController in SplitView's DetailView controller viewDidAppear.
thanks,
Naveen Shan