Q:

WatchKit Table is Blank

I'm trying to create a table on WatchKit. For some reason the app is just blank when launched in WatchKit. I've confirmed that it's a table problem (I added a static label and was able to see it). I believe I have all IBOutlets hooked up properly as well. What am I doing wrong?
I have the following code on my InterfaceController.h:
@interface InterfaceController : WKInterfaceController {
    NSMutableArray *listArray;
}

@property (weak, nonatomic) IBOutlet WKInterfaceTable *playlistTable;

InterfaceController.m:
- (void)awakeWithContext:(id)context {
    [super awakeWithContext:context];
    // Configure interface objects here.

    listArray = [[NSMutableArray alloc] initWithObjects:@"Hello", @"Watch", @"World", nil];
    [self setupTable];
}

- (void)willActivate {
    // This method is called when watch view controller is about to be visible to user
    [super willActivate];
}

- (void)didDeactivate {
    // This method is called when watch view controller is no longer visible
    [super didDeactivate];
}

- (void)setupTable {

    [self.playlistTable setRowTypes:listArray];

    for (int i = 0; i < self.playlistTable.numberOfRows; i++)
    {
        universalRow *row = [self.playlistTable rowControllerAtIndex:i];
        [row.mainTitle setText:[listArray objectAtIndex:i]];
        [row.subtitleLabel setText:@"subtitle!"];
    }
}

and NSObject row class 'universalRow':
@interface universalRow : NSObject {

}

@property (nonatomic, weak) IBOutlet WKInterfaceLabel *mainTitle;
@property (nonatomic, weak) IBOutlet WKInterfaceLabel *subtitleLabel;

@end

A:

It turns out I didn't set my Row Controllers' identifier in the storyboard. Once I did that, it worked as intended.

