NSArrays and tableView delegates
NSArrays and tableView delegates
- Subject: NSArrays and tableView delegates
- From: Steven Hamilton <email@hidden>
- Date: Thu, 4 Dec 2008 14:05:07 +1000
Hi folks,
I'm looking for advice on usage of arrays in tableviews.
I have a subclassed NSWindowController. In this class I have a method
that extracts data from my core data model and formulates an array of
dictionaries. Also in this class I have the tableview datasource
methods. The datasource methods use the standard KVC column identifier
thingies to populate the table. I'm having memory leaks and I'm sure
its because of the way I'm making the array available to teh data
source methods.
My interface file looks like this;
@interface MLimportController : NSWindowController {
IBOutlet NSTableView *transactionTable;
IBOutlet NSArrayController *accountsController;
NSMutableArray *importedTransactions;
NSManagedObject *selectedAccount;
NSNumber *selectedTransferIndex;
}
- (IBAction) recordTransactions:(id)sender;
- (IBAction) deleteSelectedTransactions:(id)sender;
- (void) setAccountSortDescriptors: (NSArray *) descriptors;
- (NSArray *) accountSortDescriptors;
- (void) importFile:(NSString *)aFile;
//delegates
- (int)numberOfRowsInTableView:(NSTableView *)tableView;
- (id)tableView:(NSTableView *)tableView objectValueForTableColumn:
(NSTableColumn *)tableColumn row:(int)row;
- (void)tableView:(NSTableView *)tableView setObjectValue:(id)newValue
forTableColumn:(NSTableColumn *)tableColumn row:(int)row;
@end
In the importFile: method is where I build they array
importedTransactions. However, as it will autorelease I [retain] it so
its still hanging around for the tableView methods to access it. Is
this the correct way of doing this? Or should I be declaring the
NSArray as a @property and using getters/setters to use it?
My memory leak is resulting in importedTransactions always having a
retainCount of 1, meaning the importController class can never be
deallocated by my NSDocument, meaning the documentController can never
close the document properly. I'm sure I'm doing this an ugly way.
(Leopard 10.5.5 with GC on)
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