NSViewController view's not released when used in a view based NSTableView - macos

Question

I have a view based NSTableView that uses the views of NSViewController subclasses (InspectorViewController) :
- (NSView *)tableView:(NSTableView *)tableView viewForTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)row {
// Get inspector view controller
InspectorViewController *inspectorViewController = [_inspectorViewControllers objectAtIndex:row];
// Return its view
return inspectorViewController.view;
}
All is ok except that the view of NSViewController is never released when I remove the view controller (which is well released).
If I use this code instead :
- (NSView *)tableView:(NSTableView *)tableView viewForTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)row {
// Get inspector view controller
InspectorViewController *inspectorViewController = [_inspectorViewControllers objectAtIndex:row];
// Return its view
NSTableCellView *view = [[NSTableCellView alloc] init] autorelease];
[view addSubview:inspectorViewController.view];
return view;
}
The view is correctly released when I remove the view controller.
Here is the code for removing a view controller :
- (void)inspectorViewControllerClosed:(InspectorViewController *)inspectorViewController {
// Get index of inspector view controller
NSUInteger index = [_inspectorViewControllers indexOfObject:inspectorViewController];
// Remove inspector view controller in array
[_inspectorViewControllers removeObject:inspectorViewController];
// Create index set
NSIndexSet *indexSet = [NSIndexSet indexSetWithIndex:index];
// Begin updates
[_tableView beginUpdates];
// Move row in table view
[_tableView removeRowsAtIndexes:indexSet withAnimation:NSTableViewAnimationEffectFade];
// End updates
[_tableView endUpdates];
}
I tried to reproduce the problem with a small sample code and I have the same problem, the view of view controller is only released when I don't return directly the view of view controller.
Anybody can help me please ?

Answer 1

Found, NSTableView retains view for reusing, it is correctly released with this code :
- (NSView *)tableView:(NSTableView *)tableView viewForTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)row {
// Get inspector view controller
InspectorViewController *inspectorViewController = [_inspectorViewControllers objectAtIndex:row];
// Disable reusing ?
[_inspectorViewController.view setIdentifier:nil];
// Return its view
return inspectorViewController.view;
}

Answer 2

You could use:
[inspectorViewController.view removeFromSuperview]
before removing the view controller.