Problems merging two tableviews into a tabbar with Core Data - iphone

Question

I have one tabbar with several views, one with a tableview connected to Core Data. Now I've made one more tableview in a different project, and I want to merge it to my first project. This isn't new to me, I've done it before in another project where I had three tableviews with different core data tables, all working good. So I thought this would be a walk in the park.
In my AppDelage.m and .h I've added and copied all the code for the managedObjectContext to managedObjectContext2. And made a new navigation controller, "navigationController2".
ProtokollList *protokollList = (ProtokollList *)[navigationController2 topViewController];
// Set its managedObjectContext property to the managed object context
protokollList.managedObjectContext2 = self.managedObjectContext2;
// Get the root view controller; it's in the topViewController property of the navigation controller
KortKategori *kortKategori = (KortKategori *)[navigationController topViewController];
// Set its managedObjectContext property to the managed object context
kortKategori.managedObjectContext = self.managedObjectContext;
And then in my ProtokollList.m I've changed managedObjectContext to managedObjectContext2. And made necessary connections in MainWindow.nib.
But when I try to run the project I get this error message:
2011-07-24 18:22:58.188 Kortspel[1346:207] Unknown class ProtokollList in Interface Builder file.
2011-07-24 18:22:58.198 Kortspel[1346:207] -[UIViewController setManagedObjectContext2:]: unrecognized selector sent to instance 0x4d13c40
2011-07-24 18:22:58.199 Kortspel[1346:207] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UIViewController setManagedObjectContext2:]: unrecognized selector sent to instance 0x4d13c40'
*** Call stack at first throw:
(
0 CoreFoundation 0x00fab5a9 __exceptionPreprocess + 185
1 libobjc.A.dylib 0x010ff313 objc_exception_throw + 44
2 CoreFoundation 0x00fad0bb -[NSObject(NSObject) doesNotRecognizeSelector:] + 187
3 CoreFoundation 0x00f1c966 ___forwarding___ + 966
4 CoreFoundation 0x00f1c522 _CF_forwarding_prep_0 + 50
5 Kortspel 0x00001f28 -[KortAppDelegate applicationDidFinishLaunching:] + 709
6 UIKit 0x002c4ce2 -[UIApplication _callInitializationDelegatesForURL:payload:suspended:] + 1252
7 UIKit 0x002c6d88 -[UIApplication _runWithURL:payload:launchOrientation:statusBarStyle:statusBarHidden:] + 439
8 UIKit 0x002d1617 -[UIApplication handleEvent:withNewEvent:] + 1533
9 UIKit 0x002c9abf -[UIApplication sendEvent:] + 71
10 UIKit 0x002cef2e _UIApplicationHandleEvent + 7576
11 GraphicsServices 0x01903992 PurpleEventCallback + 1550
12 CoreFoundation 0x00f8c944 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 52
13 CoreFoundation 0x00eeccf7 __CFRunLoopDoSource1 + 215
14 CoreFoundation 0x00ee9f83 __CFRunLoopRun + 979
15 CoreFoundation 0x00ee9840 CFRunLoopRunSpecific + 208
16 CoreFoundation 0x00ee9761 CFRunLoopRunInMode + 97
17 UIKit 0x002c67d2 -[UIApplication _run] + 623
18 UIKit 0x002d2c93 UIApplicationMain + 1160
19 Kortspel 0x00001c40 main + 102
20 Kortspel 0x00001bd1 start + 53
)
terminate called after throwing an instance of 'NSException'
I don't know it says that it doesn't recognize "ProtokollList" class, because it's defined in ProtokollList.h.
Does anyone have any idea? This is the last step before launching!
EDIT:
If I try to blank out:
/*
ProtokollList *protokollList = (ProtokollList *)[navigationController2 topViewController];
// Set its managedObjectContext property to the managed object context
protokollList.managedObjectContext2 = self.managedObjectContext2;
*/
I can open the project, but when I click on ProtokollList-tableview I get this new error message:
2011-07-25 20:06:56.588 Kortspel[3205:207] Unknown class ProtokollList in Interface Builder file.
2011-07-25 20:07:01.585 Kortspel[3205:207] -[UIViewController tableView:numberOfRowsInSection:]: unrecognized selector sent to instance 0x590f3f0
2011-07-25 20:07:01.587 Kortspel[3205:207] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UIViewController tableView:numberOfRowsInSection:]: unrecognized selector sent to instance 0x590f3f0'
*** Call stack at first throw:
(
0 CoreFoundation 0x00fb25a9 __exceptionPreprocess + 185
1 libobjc.A.dylib 0x01106313 objc_exception_throw + 44
2 CoreFoundation 0x00fb40bb -[NSObject(NSObject) doesNotRecognizeSelector:] + 187
3 CoreFoundation 0x00f23966 ___forwarding___ + 966
4 CoreFoundation 0x00f23522 _CF_forwarding_prep_0 + 50
5 UIKit 0x004882b7 -[UISectionRowData refreshWithSection:tableView:tableViewRowData:] + 1834
6 UIKit 0x00485d88 -[UITableViewRowData numberOfRows] + 108
7 UIKit 0x00339677 -[UITableView noteNumberOfRowsChanged] + 132
8 UIKit 0x00346708 -[UITableView reloadData] + 773
9 UIKit 0x00343844 -[UITableView layoutSubviews] + 42
10 QuartzCore 0x01f52a5a -[CALayer layoutSublayers] + 181
11 QuartzCore 0x01f54ddc CALayerLayoutIfNeeded + 220
12 QuartzCore 0x01efa0b4 _ZN2CA7Context18commit_transactionEPNS_11TransactionE + 310
13 QuartzCore 0x01efb294 _ZN2CA11Transaction6commitEv + 292
14 QuartzCore 0x01efb46d _ZN2CA11Transaction17observer_callbackEP19__CFRunLoopObservermPv + 99
15 CoreFoundation 0x00f9389b __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 27
16 CoreFoundation 0x00f286e7 __CFRunLoopDoObservers + 295
17 CoreFoundation 0x00ef11d7 __CFRunLoopRun + 1575
18 CoreFoundation 0x00ef0840 CFRunLoopRunSpecific + 208
19 CoreFoundation 0x00ef0761 CFRunLoopRunInMode + 97
20 GraphicsServices 0x019091c4 GSEventRunModal + 217
21 GraphicsServices 0x01909289 GSEventRun + 115
22 UIKit 0x002d9c93 UIApplicationMain + 1160
23 Kortspel 0x00002524 main + 102
24 Kortspel 0x000024b5 start + 53
)
terminate called after throwing an instance of 'NSException'
Best regards,
xqtr

Answer 1

EDIT:
I understand that the critical point is the warning about IB (did not notice it at start)...
Could you check that ProtokollList.h and ProtokollList.m are effectively assigned to the target you are building? (I think so, otherwise you would have more linking problems, anyway, this is a basic check).
If this is ok, then I would simply try a clean and rebuild all.
If this does not fix the problem, then this might mean that the linker is not including ProtokollList.m in the final binary because of some optimization (the class is possibly never referenced in the rest of your code, just in Interface Builder). The fix for this is adding -all_load to the linker flags of your project.
If this does not help, I am very sad but I have no more suggestions...
You are calling:
protokollList.managedObjectContext2 = self.managedObjectContext2;
and no property named managedObjectContext2 is found in protokollList. This can be inferred by the line:
-[UIViewController setManagedObjectContext2:]: unrecognized selector sent to instance 0x4d13c40
So, you should possilby define managedObjectContext2 in protokollList (which should be a UIViewController).
EDIT;
interface ProtokollList : UITableViewController <NSFetchedResultsControllerDelegate> {
NSFetchedResultsController *fetchedResultsController2;
NSManagedObjectContext *managedObjectContext2;
}
#property (nonatomic, retain) NSManagedObjectContext *managedObjectContext2;
#end