Re: NSViewController awakeFromNib and NSTableView numberOfRowsInTableView
Re: NSViewController awakeFromNib and NSTableView numberOfRowsInTableView
- Subject: Re: NSViewController awakeFromNib and NSTableView numberOfRowsInTableView
- From: Keary Suska <email@hidden>
- Date: Thu, 25 Jun 2009 19:54:16 -0600
On Jun 25, 2009, at 7:33 PM, Peter Zegelin wrote:
I have come across what seems to be a weird situation and can't
really think of a good solution. I'm relatively new to Cocoa so its
probably just a simple misunderstanding.
I have a subclass of NSViewController that also acts as the delegate
for the NSTableView that it controls. This tableview is loaded into
my main window. I want to be able to hide some columns in the
tableview and as a result, the number of rows in the tableview will
vary according to numColumns. ie:
-(int)numberOfRowsInTableView:(NSTableView *)tableView{
return myDataSize/numColumns;
}
Now, I haven't got around to actually varying the number of columns
in the table yet, but I do have a property 'numColumns' that I set
to a reasonable value in awakeFromNib:
- (void)awakeFromNib{
numColumns = 8;
}
Unfortunately my numberOfRowsInTableView is being called 'before'
awakeFromNib, so initially numColumns = 0 and I get an error
(myDataSize/numColumns will be infinite).
I always thought awakeFromNib would get called first. But in this
case not so. So can anyone suggest why, and a workaround?
There is no such guarantee for -awakeFromNib. You either need to set
the value earlier, or call -reloadData on the table.
Best,
Keary Suska
Esoteritech, Inc.
"Demystifying technology for your home or business"
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