I have UIViewController in Viewbased application.
I want to push another UIViewcontroller from it.
-(IBAction) Myfunction
{
MedicineSearchSystem *medicineSearchSystem = [[MedicineSearchSystem alloc] initWithNibName:#"MedicineSearchSystem" bundle:nil];
[self.parentViewController:medicineSearchSystem animated:YES]; // Crash here
}
As warrenm already told you, first check if your viewController has a navigationController by calling something like : NSLog(#"%#", self.navigationController) then you can push using:
[self.navigationController pushViewController:medicineSearchSystem animated:YES];
self.mainItemListViewController = [[[NCItemsViewController alloc] init] autorelease];
self.navigationController = [[UINavigationController alloc] initWithRootViewController:self.mainItemListViewController];
[window addSubview:[self.navigationController view]];
[window makeKeyAndVisible];
Related
I have a UIViewController with two UITableView's in it. When i select a row in the first UITableView it has to push the same UIViewController which doesnt happen.
In UIViewController.h i have,
FirstTableViewController *firstController;
SecondTableViewController *secondController;
In UIViewController.m i have,
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
if (firstController == nil) {
firstController = [[FirstTableViewController alloc] init];
}
if (secondController == nil) {
secondController = [[SecondTableViewController alloc] init];
}
UINavigationController *firstNavigationController = [[UINavigationController alloc] initWithRootViewController:firstController];
firstController.product = self.product;
[firstTable setDataSource:firstController];
[firstTable setDelegate:firstController];
firstNavigationController.view = firstController.tableView;
}
In FirstTableViewController.m, didSelectRowAtIndexPath i have,
[self.searchDisplayController setActive:YES animated:YES];
UIViewController *controller = [[UIViewController alloc]initWithNibName:#"UIViewController" bundle:nil];
UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:controller];
navController.modalTransitionStyle = UIModalTransitionStyleCoverVertical;
controller.product = prod;
NSLog(#"Navigation controller is %#",self.navigationController); //not null
[[self navigationController]pushViewController:controller animated:YES];
Please help.
EDIT #1: UIViewController is called from the FlipsideViewController of the UtilityApp.
Add a property to your AppDelegate UINavigationController *nav
add this line to AppDelegate.m in application didFinishLaunching method
navigationControl = [[UINavigationController alloc] initWithRootViewController:yourFirst ViewController];
Go to yourFirstViewController, add an UINavigationController *nav property and add these lines to viewDidLoad method
AppDelegate *app = [[UIApplication sharedApplication] delegate];
self.nav = app.nav;
Use this line to push any viewController
[self.nav pushViewController:controller animated:YES];
If you want to show a view controller modally, you should use presentViewController:animated:completion: and not pushViewController:animated:.
[self presentViewController:controller animated:YES completion:nil];
Use this Code in "didSelectRowAtIndexPath"
UIViewController *controller = [[UIViewController alloc]initWithNibName:#"UIViewController" bundle:nil];
[self.navigationController pushViewController:controller animated:YES];
[viewController release];
LoginViewSimpleController *loginViewSimple = [[LoginViewSimpleController alloc]init];
UINavigationController *navController = [[UINavigationController alloc]initWithRootViewController:loginViewSimple];
[self setNavigationController:navController];
Have you identify both tableviews ? Can you Post log status here ?
employeeDetailed = [[[EmployeeDetailedViewController alloc] initWithNibName:#"EmployeeDetailedViewController" bundle:nil] autorelease];
UINavigationController *navController = [[[UINavigationController alloc] initWithRootViewController:employeeDetailed] autorelease];
[employeeDetailed release];
[self.navigationController pushViewController:navController animated:YES];
I try this its saying bad access.[crash]
how to reslove this issue.
# thanks in advance
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Override point for customization after application launch.
// Set the view controller as the window's root view controller and display.
UINavigationController *navController = [[[UINavigationController alloc] initWithRootViewController:self.viewController] autorelease];
self.window.rootViewController = navController;
[self.window makeKeyAndVisible];
return YES;
}
employeeDetailed = [[[EmployeeDetailedViewController alloc] initWithNibName:#"EmployeeDetailedViewController" bundle:nil] autorelease];
[self. navigationController presentModalViewController: navController];
This will work for you try this.
You have autorelease set in the first line (alloc/init)
You are then explicitly releasing the view controller on line three.
You are therefore over-releasing this object and causing the crash.
You can remove the [employeeDetailed release] line and it will be fine.
You cannot add UINavigationController to existed navigation stack. Instead of you need to show new navigation controller modal like this:
employeeDetailed = [[[EmployeeDetailedViewController alloc] initWithNibName:#"EmployeeDetailedViewController" bundle:nil] autorelease];
UINavigationController *navController = [[[UINavigationController alloc] initWithRootViewController:employeeDetailed] autorelease];
[self presentModalViewController: navController];
The Best Way I found to present Navigation Controller in a specific part in your Application is like these:
MyViewController *myViewController = [[MyViewController alloc]initwithnibname :#"MyViewController"];
UINavigationController *myNavC = [[UINavigationController alloc]initWithRootViewController:myViewController];
Then in your myViewController.m
use
[self.NavigationController pushViewController: XController animated:YES];
This is a view based application.
in delegate.m file I have done like this to launch login screen initially:
- (void)applicationDidFinishLaunching:(UIApplication *)application
{
[window addSubview:viewController.view];
[window makeKeyAndVisible];
LoginView *loginView=[[LoginView alloc]initWithNibName:#"LoginView" bundle:nil];
[window addSubview:loginView.view];
}
By adding the above code I have launched login screen sucessfully, but at the bottom of my login screen I can see a space left out.
How can the tab bar controller get launched after sucessful login?
i have creatd a method called login in my LoginView.m file:
-(void)login
{
if(login)
{
TabBarController *tabBarController = [[TabBarController alloc] initWithNibName:#"TabBarController" bundle:nil];
[self.view addSubView: aTabBarController.view];
}
[aTabBarController release];
Please help me out of this with the appropriate code.
you have to create on method in appDelegate like.. and In appDelegate.h you have to create an object like this
UITabBarController *Obj_tabbar;
and then in .m file,
-(void) switchToTabbarController
{
Obj_tabbar.delegate = self;
Obj_tabbar.selectedIndex = 0;
Tracking_HomeVC *obj = [[Tracking_HomeVC alloc]init];
[self tabBarController:Obj_tabbar didSelectViewController:obj];
[self.window addSubview:Obj_tabbar.view];
}
// At this point Tracking_HomeVC is the first view controller of the TabbarController. and it will be added on window.
- (void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController
{
if([tabBarController selectedIndex] == 0)
{
//Write your code here to do with the first view controller object.
}
}
and then call it from your LoginView like..
-(void)LoginPressed
{
AppAppDelegate *delegate =(AppAppDelegate *) [[UIApplication sharedApplication] delegate];
[delegate switchToTabbarController];
}
Your login view (or it's controller if you have one which it looks like you don't) should tell the appDelegate to swap the RootViewController to be a taBarController. You do NOT want the loginview to be trying to add a tabBar as a child of itself.
One way of doing it is creating a tabbarcontroller like normal in your appdelegate and set it as rootviewcontroller:
TOTabBarController *tabBarController = [[TOTabBarController alloc] init];
UIViewController *vc1 = [[UIViewController alloc] initWithNibName:nil bundle:nil];
UIViewController *vc2 = [[UIViewController alloc] initWithNibName:nil bundle:nil];
UIViewController *vc3 = [[UIViewController alloc] initWithNibName:nil bundle:nil];
UINavigationController *vc2_nc = [[UINavigationController alloc] initWithRootViewController:vc2];
UINavigationController *vc3_nc = [[UINavigationController alloc] initWithRootViewController:vc3];
NSArray *viewControllers = [NSArray arrayWithObjects:vc1, vc2_nc, vc3_nc, nil];
[tabBarController setViewControllers:viewControllers];
//set tabbarcontroller as rootviewcontroller
[[self window] setRootViewController:tabBarController];
Then display the login screen modally (without animation) if the user is not logged in:
if (not logged in) {
UIViewController *lvc_nc = [[UIViewController alloc] init];
[[[self window] rootViewController] presentModalViewController:lvc_nc animated:NO];
}
Hope that helps!
I am building an app that has a login screen that leads to a tabbar. I followed this example on how to push a modal view once you launch the app (as the "sign in" page) and then dismiss it.
Example --> Show / Hide tab bar
From some reason, it's not really working - when I launch the app, I see the tabbar view with the two view controllers. no sign in page.
here is my code:
AppDelegate:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
// Override point for customization after application launch.
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
UIViewController *viewController1 = [[FirstTab alloc] initWithNibName:#"FirstTab" bundle:NSBundle.mainBundle];
UIViewController *viewController2 = [[SecondTab alloc] initWithNibName:#"SecondTab" bundle:NSBundle.mainBundle];
UINavigationController *secondNavController = [[UINavigationController alloc]initWithRootViewController:viewController2];
self.tabBarController = [[UITabBarController alloc] init];
self.tabBarController.viewControllers = [NSArray arrayWithObjects:viewController1, secondNavController, nil];
self.window.rootViewController = self.tabBarController;
[self.window makeKeyAndVisible];
return YES;
}
My first tab (which is where I understand all this modal view business needs to happen)
.h
#interface FirstTab : UIViewController
#end
.m
//UPDATED CODE PER COMMENT BELOW
- (void)viewDidLoad
{
[super viewDidLoad];
SignIn *loginview = [[SignIn alloc] initWithNibName:#"SignIn" bundle:nil];
UINavigationController *controller = [[UINavigationController alloc] initWithRootViewController: loginview];
self.hidesBottomBarWhenPushed = YES;
[self presentModalViewController:controller animated:YES];
}
And of course, I dismiss the modal view in the SignIn view controller, though I never get there as I mentioned.
What am I doing wrong here? Thanks for the help!!
You could use :
[[self tabBarController] presentModalViewController:controller animated:YES];
since first viewController1 is your first tab, and self.navigationController might be nil.
In your custom view controller subclass called SignIn implement initWithNibName:bundle: instead if init.
-(id)initWithNibName:(NSString *)nibNameOrNil
bundle:(NSBundle *)nibBundleOrNil {
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// init here
}
}
Now when init/alloc it call either :
SignIn *loginview = [[SignIn alloc] initWithNibName:#"SignIn" bundle:nil];
if your interface is in a NIB file, or :
SignIn *loginview = [[SignIn alloc] initWithNibName:nil bundle:nil];
if there no NIB.
Also why putting it as a root view controller of any navigation controller ? unless you need to go deeper in some model data presentation, just present it directly :
// why ?
//UINavigationController *controller = [[UINavigationController alloc]
// initWithRootViewController: loginview];
//self.hidesBottomBarWhenPushed = YES;
//[self presentModalViewController:controller animated:YES];
[self presentModalViewController:loginView animated:YES];
You have to include this in your code,
yourModelController =[[Yourmodelcontroller alloc]init];
UINavigationController *controller = [[UINavigationController alloc] initWithRootViewController: yourModelController];
self.hidesBottomBarWhenPushed = YES;
[[self navigationController] presentModalViewController:controller animated:YES];
[controller release];
hope this will help you out.
I've encountered issues where modals don't like showing from viewDidLoad. Try adding your code to your viewWillAppear and it should show.
how do i add a navigationViewController to a UIViewController?
- (void)applicationDidFinishLaunching:(UIApplication *)application {
loginViewController *vc1=[[loginViewController alloc]initWithNibName:#"login" bundle:[NSBundle mainBundle]];
rootViewController* vc2 = [[[rootViewController alloc] init] autorelease];
UINavigationController* navController = [[[UINavigationController alloc]
initWithRootViewController:vc2] autorelease];
NSArray* controllers = [NSArray arrayWithObjects:vc1,navController, nil];
//loginViewController.viewControllers = controllers;
[window addSubview:[self.loginController view]];
// Override point for customization after application launch
[window makeKeyAndVisible];
}
i'm stuck with this.need some help...
The simplest way to do this is to change your init when setting up the navController. Also, you'll want to keep the navController around, probably as a member variable of your app delegate:
//in your header file:
....class definition
UINavigationController *_navigationController;
....
//in your implementation file:
_navigationController = [[UINavigationController alloc] initWithRootViewController: rootViewController];
//optional: if you want to start off 'one level in' to your navigation stack:
[_navigationController pushViewController: vc1 animated: NO];
[window addSubview _navigationController.view];
if I understand right, you should use
[window addSubview:[self.navController view]];
then you can send push/pop messages to self.navigationController to manage content of navigationController's stack.