objective c - Disposing of NSManagedObjectContexts in a Core Data management class -

so making framework hold code used manipulate core data database. have ended having issue this.

i have method returns new item

- (nsmanagedobject *)createitem; 

once have modified item call

- (void)save; 

this has able executed in multiple threads managed object return method has have nsmanagedobjectcontext consistent inside thread. solution solve create nsmutabledictionary hold references nsmanagedobjectcontexts using

[nsthread hash] 

as key. works great. problem cannot rid of contexts once threads have finished.

does have idea on how detect that?

here code managed object context method

// return managed object context framework - (nsmanagedobjectcontext *)managedobjectcontext {     // thread hash value     nsthread * currentthread = [nsthread currentthread];     nsnumber * hashvalue = [nsnumber numberwithunsignedinteger:[currentthread hash]];      // context thread hash     nsmanagedobjectcontext * context = [self.managedobjectcontexts objectforkey:hashvalue];      // check context exists     if (!context)     {         // create managed object context persistent store coordinator in main thread         nspersistentstorecoordinator * coordinator = [self persistentstorecoordinator];         if (coordinator != nil) {             context = [[nsmanagedobjectcontext alloc] init];             [context setpersistentstorecoordinator:coordinator];         }          // add context available contexts         [self.managedobjectcontexts setobject:context forkey:hashvalue];     }      // return     return context; } 

look @ using threaddictionary available on each nsthread. in way can moc thread (or know if there isn't one) , cleanup handled you.