Question

Whilst trying to create a view based table it keeps calling the objectValueForTableColumn function instead of the viewForTableColumn.

I have set the table view to “view based” in its settings. But still I cannot make it call the correct function. I’ve looked at the implementation of apples example (tableviewplayground) and at some points even copy pasted the IB and functions, still no progress.

The relevant code:

// Should run
- (NSView *)tableView:(NSTableView *)tableView viewForTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)row 
{    
    return nil;
}

// Gets run
-(id)tableView:(NSTableView *)tableView objectValueForTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)row
{
    return nil;
}

Two pictures, not sure how helpful they are but still. https://i.stack.imgur.com/8CKCx.jpg

Answer 1

A few things to check:

• Does your NSTableView have its delegate set to the class that
  implements the NSTableViewDelegate protocol? (I ask because
  tableView:viewForTableColumn:row: is a delegate method whereas the
  tableView:objectValueForTableColumn:row: is a data source method.)

• Are there any bindings that are set in IB? (You mention that you
  copied the nib from an existing project.) Check mainly for bindings
  to the NSTableView content binding and to the provided view’s
  subviews (usually the text field.)

• Do you implement the numberOfRowsInTableView: method from the
  NSTableViewDataSource protocol and does it return a nonzero
  integer?

Finally, you might have a look at the Table View Programming Guide chapter on “Populating View-Based Table Views Programmatically” in the documentation.