(OS X) Programmatically bound NSTableView does not display values

Question

I created a viewController with a tableView and set the identifier of the only column to "name". Then I created an arrayController, bound it to a NSManagedObjectContext and set the right entity name.

When I now load the viewController, the tableView does display the correct amount of row. But unfortunately the cells do not contain the value of the NSManagedObjects value for the key name.

What do I have to implement in my NSManagedObject subclass or in the viewController (which is the tableViews viewController)?

I'd like to show you some code, but I don't know what could be helpful here, because it's more an conceptional question... So I'll post code as requested in comments.

UPDATE

This is the code I'm using to bind the arrayController tho the tableView:

[_tableView bind:NSContentBinding toObject:_arrayController withKeyPath:@"arrangedObjects.name" options:nil];

To inspect what the tableView gets, I added this line (after adding property called "content"):

[self bind:NSContentBinding toObject:_arrayController withKeyPath:@"arrangedObjects.name" options:nil];

In the setter I got an array containing NSString instances. But the tableView still does not display any values...

Is this a view-based table view? What does the cell view consist of? Is it a bare NSTextField? Is it an NSTableCellView that contains subviews? If so, is its textField outlet connected to an appropriate subview? Is it a custom view? — Ken Thomases

Julian F. Weinert Julian F. Weinert · Accepted Answer · 2014-06-23T23:24:06

I finally used the standard NSTableViewDataSource protocol:

- (NSInteger)numberOfRowsInTableView:(NSTableView *)tableView {
    return [[_arrayController arrangedObjects] count];
}
- (id)tableView:(NSTableView *)tableView objectValueForTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)row {
    return [[[_arrayController arrangedObjects] objectAtIndex:row] valueForKey:[tableColumn identifier]];
}

I think this is a solid solution, though. I might became obsessed by the -bind:toObject:withKeyPath:options: idea.

(OS X) Programmatically bound NSTableView does not display values

1 Answers