iOS TableView not displaying cells - ios

Question

I have seen several related questions, but mine is different in that I want to do it purely in coding, so without storyboards or interface builder.
Basically I get lost in how to properly display the cells in a TableView. I have created a very simple SplitView test application. In it I try to show the same TableView twice: once in the TableViewController and once in the DetailViewController (for a user this would make little sense, but I try to grasp how to get this done).
In the TableViewController, the 3 cells show correctly, but in the DetailView, the TableView shows without the cells. There must be a simple step to have the cells drawn, but all the example cases I find assume you use storyboards or IB
In the SplitView I have:
- (id) init{
self = [super init];
JBDetailViewController *detailVC = [JBDetailViewController controller];
UINavigationController *detailNav = [[UINavigationController alloc] initWithRootViewController:detailVC];
JBTableViewController *rootVC2 = [[JBTableViewController alloc] init];
rootVC2.title = #"A TableVC title";
UINavigationController *rootNav2 = [[UINavigationController alloc] initWithRootViewController:rootVC2];
self.viewControllers = #[rootNav2, detailNav];
self.delegate = detailVC;
self.tabBarItem.title = #"a Tab title";
return self;
}
In the DetailViewer I have:
- (void) loadView {
[super loadView];
self.view.backgroundColor = [[UIColor blueColor] colorWithAlphaComponent:0.85f];
JBTableViewController *rootVC2 = [[JBTableViewController alloc] init];
[rootVC2 loadView];
rootVC2.title = #"Test van Justus";
rootVC2.view.backgroundColor = [[UIColor yellowColor] colorWithAlphaComponent:0.85f];
[self.view addSubview:rootVC2.view];
}
Both use the same JBTableViewController that is very simple and should display 3 cells, which it does in the VC, but not in the DetailView.
What do I do wrong?