No NSTableViewDelegate methods are ever called in my document-based app. Why? - objective-c

Question

I'm creating an NSTableView programatically. numberOfRowsInTableView is the only method that gets called when I assign the delegate and dataSource. The NSTableView remains blank and empty. What am I doing wrong?
in myDocument.m:
- (void)windowControllerDidLoadNib:(NSWindowController *)aController
{
NSTableView *tableView = [NSTableView alloc] initWithFrame:CGRectMake(0,0,400,400)];
// I've tried putting the delegate before the datasource. No change.
tableView.dataSource = self;
tableView.delegate = self;
// I've tried adding the table before assigning the delegate/datasource. No change.
[aController.window.contentView addSubview:tableView];
}
- (NSView *)tableView:(NSTableView *)tableView viewForTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)row
{
NSLog(#"making view for table...");
NSBox *box = [[NSBox alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];
box.borderColor = [NSColor blackColor];
box.borderWidth = 10;
return box;
}
- (id)tableView:(NSTableView *)aTableView objectValueForTableColumn:(NSTableColumn *)aTableColumn row:(NSInteger)rowIndex
{
NSLog(#"getting data...");
return #{ #"myKey": #"myValue" };
}
- (NSInteger)numberOfRowsInTableView:(NSTableView *)aTableView
{
NSLog(#"getting count...");
return 2;
}
numberOfRowsInTableView is the only thing that get's called. Why? How can I fix this?

Answer 1

You table view doesn't contain any columns and therefore doesn't call the viewForColumn: delegate method.
Replace your initialization code in windowControllerDidLoadNib with the following and your delegate methods will get called:
- (void)windowControllerDidLoadNib:(NSWindowController *)aController
{
NSTableView *tableView = [[NSTableView alloc] initWithFrame:CGRectMake(0,0,400,400)];
[tableView addTableColumn:[[NSTableColumn alloc] initWithIdentifier:#"MyColumn"]];
tableView.dataSource = self;
tableView.delegate = self;
[aController.window.contentView addSubview:tableView];
}
Probably you can use Interface Builder to configure & layout your tableview.