The <table> is connected to the nib. The <table> is not instantiated elsewhere. 
Content does show up after the table column headers are manipulated so the 
column defs are reasonable.  I'll give Jens' suggestion a try  but I have only 
seen the form below cited.  I'll remove the extraneous setNeedsDisplay: call;


Erik Stainsby
erik.stain...@roaringsky.ca
-------------------------------------
Consistently place constants on the LHS of an expression: you cannot 
accidentally assign when you meant to compare.



On 2012-02-29, at 12:25 AM, Graham Cox wrote:

> 
> On 29/02/2012, at 5:47 PM, Jens Alfke wrote:
> 
>> 
>> On Feb 28, 2012, at 8:39 PM, Erik Stainsby wrote:
>> 
>>>     [_rules addObject: rule];
>>>     [table reloadData];
>>>     [table setNeedsDisplay:YES];
>> 
>> IIRC you need to call -noteNumberOfRowsChanged instead, if you've change the 
>> number of rows. -reloadData is just for reloading the existing rows.
> 
> 
> That's news to me - I've always just called -reloadData. I believe it queries 
> the rowCount, and then marks as needing redisplay those rows that are 
> visible. This might be less optimal that reloading only the changed rows, but 
> as far as I know, this has always worked fine for me.
> 
> Erik's code looks OK, but we don't know that the outlet <table> is actually 
> pointing to anything, or that it's pointing to the correct thing. That's what 
> I'd check first - set a breakpoint in appendRule: and have a look at it.
> 
> --Graham
> 
> 


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