I am making a simple mac os x app, in which I will be showing some records
in a table view, after retrieving those from local db. I am using core data
and NSArrayController proxy for the same and I am trying to achieve it
through cocoa-bindings.
Now I can easily make it working, by performing this binding in
NSArrayController proxy:
Proxy: NSArrayController
Parameters: Managed Object Context
Bind to: App Delegate
Model Key Path: self.managedObjectContext
but I am trying to use NSManagedObjectContext proxy from Interface builder
library, for this binding:
Proxy: NSArrayController
Parameters: Managed Object Context
Bind to: Managed Object Context
Model Key Path: self
I am surprised that there is no binding available for it, in bindings pan.
At least there should be a binding to map persistent store coordinator to
it.
To assign MOC a persistent store coordinator, I am using below code:
@property (strong) IBOutlet NSManagedObjectContext*listManagedObjectContext;
[self.listManagedObjectContext setPersistentStoreCoordinator:[NSAppDelegate
persistentStoreCoordinator]];
Problem is - I am continuously getting this message in console:
Cannot perform operation since managed object context has no persistent
store coordinator
With this stack backtrace:
0 CoreFoundation 0x00007fff8b59fb06
__exceptionPreprocess + 198
1 libobjc.A.dylib 0x00007fff881103f0
objc_exception_throw + 43
2 CoreFoundation 0x00007fff8b59f8dc +[NSException
raise:format:] + 204
3 AppKit 0x00007fff907eb5e6
-[_NSManagedProxy _persistentStoreCoordinator] + 81
4 AppKit 0x00007fff907eb528
-[_NSManagedProxy _entity] + 49
5 AppKit 0x00007fff907eb43a
-[_NSManagedProxy fetchRequestWithSortDescriptors:limit:] + 95
6 AppKit 0x00007fff90cc04f0
-[NSObjectController(NSManagedController)
_executeFetch:didCommitSuccessfully:actionSender:] + 73
My questions are -
1. What is the correct way of using NSManagedObjectContext proxy in
interface builder library?
2. How can I resolve observed problem?
Please suggest.
--
Thanks,
Devarshi
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