I am building a toy app using core data for two entities Log
(attributes text
and date
) and Tag
with a many-to-many tags
relationship from Log
to Tag
.
I want to show logs in a table, so I:
NSArrayController
instance, LogController
in IB with entity set to Log
( pic ) NSTableView
whose column is bound to LogController
. pic LogController
in my app delegate ( AppDelegate
) using IBOutlet
. AppDelegate
also has the managedObjectContext
. NSCell
class with NSString
properties mainText
and tagsText
that I draw onto the cell AppDelegate
in the - (void)tableView: willDisplayCell: forTableColumn: row:
method. ( MainController
is also the table's delegate). For the tagsText
I get the tags for the current log and concatenate them into a single NSString
Everything works fine, except: When I mouse-select a row that displays multiple tags the app crashes with an EXC_BAD_ACCESS
. That's the only time I have any error, but I don't know what is causing it.
EXC_BAD_ACCESS
is a memory error. You are using an object after deallocating it. It would be difficult to debug this without the code.
Are you using the garbage collector? You do not have to manage memory yourself on the Mac.
Are the properties in your custom NSCell declared as "retain"?
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