How to set data source of NSComboBox to plist?

Question

I have a plist called People.plist and I'm trying to populate an NSComboBox called nameBox. I can't find anything in the documentation that says how to do this or if it's even possible. I assume this is easy, but I can't seem to find anything anywhere that works.

How do I populate an NSComboBox using a plist?

This is what I have, but it doesn't seem to be working.

- (void)viewDidLoad {
    [super viewDidLoad];

    self.nameBox.delegate = self;
    [_nameBox setUsesDataSource:NO];
    NSString *path = [[NSBundle mainBundle] pathForResource:@"People" ofType:@"plist"];
    NSMutableArray *contents = [NSMutableArray arrayWithContentsOfFile:path];
    for (int i = 0; i < [contents count]; i++){
        [_nameBox addItemWithObjectValue:[[contents objectAtIndex:i] objectForKey:@"Name"]];
    }
}