Re: View Based Table - where is my data?
Re: View Based Table - where is my data?
- Subject: Re: View Based Table - where is my data?
- From: "Gerriet M. Denkmann" <email@hidden>
- Date: Thu, 02 May 2013 00:27:49 +0700
On 1 May 2013, at 23:51, Quincey Morris <email@hidden> wrote:
> On May 1, 2013, at 08:34 , "Gerriet M. Denkmann" <email@hidden> wrote:
>
>> - (id)tableView:(NSTableView *)aTableView objectValueForTableColumn:(NSTableColumn *)aTableColumn row:(NSInteger)rowIndex
>> {
>> NSDictionary *aLine = self.dataArray[rowIndex];
>> NSTableCellView *cellView = [ aTableView makeViewWithIdentifier: @"DieSpalte" owner: self ];
>> [ cellView.textField setStringValue: aLine[kNameKey] ];
>> [ cellView.imageView setImage: aLine[kImageKey] ];
>> NSLog(@"%s %ld %@",__FUNCTION__, rowIndex, cellView);
>> return cellView;
>> }
>
> This is wrong. You should not create a cell view in this method, and you should not return a cell view as a result. The value returned from this method becomes the the "objectValue" property of the cell view. Because you're trying to create the cell view in the wrong place, the table view is creating one for you (a different one), and that view isn't getting its text or image set to anything useful.
>
> Instead, you should be putting the above code in a 'tableView:viewForTableColumn:row:' delegate method. Since you're (apparently) not using any bindings within your cell view, you don't need objectValue at all -- neither the data source method nor the property.
You are absolutely right.
And I was confused, because before I implemented my data-source method numberOfRowsInTableView: I was told: " *** Illegal NSTableView data source (<TbViAppDelegate: 0x101a22760>). Must implement numberOfRowsInTableView: and tableView:objectValueForTableColumn:row:" which seems not really true after all.
Thanks a lot!
Kind regards,
Gerriet.
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