Change initial View Controller of Master-Detail-Application - ios

I created a new iPhone project on a Master-Detail-Application. As I need a login before, I added at the storyboard a new ViewController, checkmarked "is initial View Controller" and assigned the new created class LoginViewController to this ViewController.
Furthermore but not relevant (in my opinion), i created a segue and connected it from the ViewController to the NavigationController (of the Master-Detail-Template).
The AppDelegate.m was changed to launch the new controller at startup:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
// Override point for customization after application launch.
/* // Old Master-Detail-View-Controller
UINavigationController *navigationController = (UINavigationController *)self.window.rootViewController;
MasterViewController *controller = (MasterViewController *)navigationController.topViewController;
controller.managedObjectContext = self.managedObjectContext;
*/
(LoginViewController *)self.window.rootViewController;
return YES;
}
This will end up in the error:
*** Terminating app due to uncaught exception 'NSInternalInconsistencyException',
reason: '-[UICollectionViewController loadView] loaded the "Qn5-Rj-iPA-view-IRE-eP
-ILZ" nib but didn't get a UICollectionView.'
I have as well tried this:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
// Override point for customization after application launch.
LoginViewController *loginViewController = [[LoginViewController alloc] init];
self.window.rootViewController = loginViewController; //Set the view controller
[self.window makeKeyAndVisible];
return YES;
}
Resulting in a similar error:
*** Terminating app due to uncaught exception 'NSInvalidArgumentException',
reason: 'UICollectionView must be initialized with a non-nil layout parameter'
Where is my mistake?
What I do not get is, where the hell the UICollectionView in the error message comes from. I did never create one or add one??

My LoginViewController inherits by mistake form UICollectionViewController instead of UIViewController. I fixed that and it works.
This explained the strange errormessage which i did not understood in the first place. As always the truth is in the sourcecode. Rechecking helps.

You don't have to do anything to load view controllers in the AppDelegate. As long as your stroyboard is the one that is loaded in project settings, it should load automatically.

Related

Error: Application windows are expected to have a root view controller at the end of application launch

I'm trying to update an iOS app written 6 years ago using OpenGL ES and Objective C.
When running the app as it is, I get this error:
4DRoom_v3[2360:42863] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Application windows are expected to have a root view controller at the end of application launch'
From what I have read here I need to set the root view controller.
I add the subview here:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
[MeshViewAppDelegate globalVarInit];
//sleep(1);
glView.multipleTouchEnabled = TRUE;
load4Dice();//(str, NEW);
[window addSubview:glView];
//[window makeKeyAndVisible];
glView.animationFrameInterval = 1.0/40;
printf("finish luanching\n");
//[glView startAnimation];
return YES;
}
glView is a subclass of UIView. But I don't see how to implement the solution given since in this case, the view is not a property of a UIViewController.
It isn't clear to me what UIViewController I could set as the root view controller.
Any help would be greatly appreciated.
Create a view controller and add your glview as subview:
UIViewController* vc = [[UIViewController alloc]initWithNibName:nil bundle:nil];
[vc.view addSubview:glview];
window.rootViewController = vc;

iOS - navigate From AppDelegate to UITableViewController

I try to navigate to certain ViewController after I get remote Notification
It crashes after this code any help please
My storyboard like this
SWRevealViewController -> NavViewController -> UIViewController
I want to reach this UIViewController
- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo
{
UIStoryboard *storyboard =[UIStoryboard storyboardWithName:#"Main" bundle:nil];
// my ViewController I want navigate to UITableViewController call home_tableview
Home_tableView *home =[storyboard instantiateViewControllerWithIdentifier:#"home_view"];
[(UINavigationController *)self.window.rootViewController pushViewController:home animated:NO];
}
The Error I get
2015-01-20 13:04:14.379 SchoolLink[1304:416727] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[__NSArrayM insertObject:atIndex:]: object cannot be nil'
*** First throw call stack:(0x25bd749f 0x3338dc8b 0x25af30b3 0x2909d06b 0x11d48f 0x29099d0f 0x29099a7d 0x2909f953 0x2910643d 0x111dbd 0x2930286b 0x292fa54d 0x2c3680d1 0x25b9dd7d 0x25b9d041 0x25b9bb7b 0x25ae93c1 0x25ae91d3 0x2cee70a9 0x290f8fa1 0x12b7ad 0x3390daaf)
libc++abi.dylib: terminating with
I suppose you have an UINavigationController in your storyboard which embeds your view controllers.
If that's the case, your code should work without any issues.
I've tested it in a new project with two view controllers and one navigation controller as the initial view and everything is fine.
If you're certain that you have all the storyboard identifiers right, and that your initial View in Interface Builder is an UINavigationController that embeds all of your ViewControllers, then you have some issues elsewhere, not in the code you've pasted in.
Since your error is related to insertObjectAtIndex: I believe there's some data you instantiate your UITableViewController with in the normal workflow of the app (when segueing to it) and when you try to present the UITableView controller in a clean state from a notification, that data is missing, hence the crash.
Check where you try to add an object to an array at a given index.
The problem is either in the class that receives the notification (I guess it's your AppDelegate class), either in the UITableViewController class, somewhere in the initialization.
Try
Home_tableView *home =[storyboard instantiateViewControllerWithIdentifier:#"home_view"];
[self.window setRootViewController:home]
[self.window makeKeyAndVisible];
Please try this:
UIStoryboard *storyboard =[UIStoryboard storyboardWithName:#"Main" bundle:nil];
Home_tableView*svc = [storyboard instantiateViewControllerWithIdentifier:#"home_view"];
// Configure the new view controller here.
[self presentViewController:svc animated:YES completion:nil];

Pass data in UISplitViewController

I want to pass data from Master view controller to Detail view controller according to the picture below. I am using protocols and Delegates to pass data. There is no problem to pass data from A to B. It happens when I try to pass data from A to C.
But the app is returning the error:
014-07-05 01:03:00.043 PassingDataBack[2216:70b] -[UIViewController
didSelectData:]: unrecognized selector sent to instance 0x8e3d2d0
2014-07-05 01:03:00.047 PassingDataBack[2216:70b] *** Terminating app
due to uncaught exception 'NSInvalidArgumentException', reason:
'-[UIViewController didSelectData:]: unrecognized selector sent to
instance 0x8e3d2d0'
I believe the problem is in the AppDelegate file that i wrote:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
UISplitViewController *splitViewController = (UISplitViewController *) self.window.rootViewController;
splitViewController.delegate = [splitViewController.viewControllers lastObject];
DetailViewController *detailViewController = (DetailViewController *)[[splitViewController.viewControllers objectAtIndex:1] topViewController];
MasterViewController *masterViewController = (MasterViewController *)[[splitViewController.viewControllers objectAtIndex:0] topViewController];
masterViewController.delegate = detailViewController;
// Override point for customization after application launch.
return YES;
}
Could you help to find the solution?

How to add/connect NIB to programmatically created UINavigationController?

First of all, I'm a beginner, so I might have my concepts wrong.
This is my code in AppDelegate.m:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
UIViewController *viewController = [[UIViewController alloc] initWithNibName:#"FirstView" bundle:nil];
self.navigationController = [[UINavigationController alloc] initWithRootViewController: viewController];
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.
self.window.backgroundColor = [UIColor whiteColor];
self.window.rootViewController = self.navigationController;
[self.window makeKeyAndVisible];
return YES;
}
The idea is to programmatically add UINavigationController, but then use a .xib (the "FirstView" paremeter) for the views. I have no problem with programmatically creating the views as well, but for simpler interfaces, I assume using IB can be done as well.
However, when I run the code, I get this error:
2013-07-11 21:20:42.644 new-book-proto-01[64308:11303] *** Terminating app due
to uncaught exception 'NSInternalInconsistencyException', reason:
'-[UIViewController _loadViewFromNibNamed:bundle:] loaded the "FirstView" nib
but the view outlet was not set.'
What should I do? Is there anything missing?
Additionally, is something like this common in iOS development? Is it bad practice? Is there a better way to do this?
This is the reason as told: "reason:
'-[UIViewController _loadViewFromNibNamed:bundle:] loaded the "FirstView" nib
but the view outlet was not set.' "
It means that you try to access or get value for some views (UI elements) that has not IBOutlet in your controller class or you have none view at all
You should create IBOutlets (properties) for each view (each UI element is view) that you would like to "see" in your controller

iOS:How to open Another UINavigationController inside Existing UINavigationController?

I am facing crash with following code. The scenario is
This is my app delegate method in which i load RTC_HomeVC using UINavigationController.
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
RTC_HomeVC *obj_RTC_HomeVC=[[RTC_HomeVC alloc]init];
UINavigationController *nav=[[UINavigationController alloc]initWithRootViewController:obj_RTC_HomeVC];
// Override point for customization after application launch.
self.window.rootViewController=nav;
[obj_RTC_HomeVC release];
[nav release];
self.window.backgroundColor = [UIColor whiteColor];
[self.window makeKeyAndVisible];
return YES;
}
Now I want to open UINavigationController inside a parent Navigation controller. So i use a following code. The method -(IBAction)call_SectionFlow is in RTC_HomeVC.
-(IBAction)call_SectionFlow{
RTC_1_StoreDetailsVC *obj_StoreDetailsVC=[[RTC_1_StoreDetailsVC alloc]initWithNibName:#"RTC_1_StoreDetailsVC" bundle:nil];
RTC_3_EnablingWorksVC *obj_EnablingWorksVC = [[RTC_3_EnablingWorksVC alloc]initWithNibName:#"RTC_3_EnablingWorksVC" bundle:nil];
UINavigationController *navController_Sections = [[UINavigationController alloc] init];
NSArray *array_ControllerArray=[[NSArray alloc]initWithObjects:obj_StoreDetailsVC,obj_EnablingWorksVC, nil];
[navController_Sections setViewControllers:array_ControllerArray animated:FALSE]
navController_Sections.view.frame=CGRectMake(14, 40, 996,636 );
[self.view addSubview:[[[navController_Sections viewControllers] objectAtIndex:0] view]];
}
When i called this method application is crashed. This is crash log.
Crash log:
* Terminating app due to uncaught exception 'UIViewControllerHierarchyInconsistency', reason: 'child view controller:< RTC_1_StoreDetailsVC: 0x71f53a0 > should have parent view controller:< RTC_HomeVC: 0x758b310 > but actual parent is:< UINavigationController: 0x71f55d0 >'
* First throw call stack:
(0x1c9c012 0x10d9e7e 0x1c9bdeb 0x6838a 0x68739 0x6f5a3 0x67eed 0x4fc3 0x10ed705 0x24920 0x248b8 0xe5671 0xe5bcf 0xe4d38 0x5433f 0x54552 0x323aa 0x23cf8 0x1bf7df9 0x1bf7ad0 0x1c11bf5 0x1c11962 0x1c42bb6 0x1c41f44 0x1c41e1b 0x1bf67e3 0x1bf6668 0x2165c 0x1f82 0x1c45)
libc++abi.dylib: terminate called throwing an exception
So any one can tell me
What is wrong with this code? And which approach i should follow for resolving this crash ?
How to open another UINavigationController in existing UINavigationController?
Thanks.
Do not add subviews to UIWindow manually. It is not supported (or at least it does not work OK).
Use this method:
[firstNavigationVC presentViewController:secondNavigationVC animated:YES completion:nil];
What is causing crash is, that you are adding obj_StoreDetailsVC to the new navigation controller and then its view to self.view. Once a VC is child of another VC, its view must be descendant of that VC's view. Maybe you can add secondNavigationVC's view to to the view of firstNavigationVC, but that isn't how UIKit is supposed to work. Use the above method.

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