UITableView's subview never shows up - ios

Question

I'm trying to add a subview to UITableView (yes, not UITableViewCell but UITableView). And it is never shown. At first I thought that I add it too early and it gets covered by the cells, but that's not true. I tried to add it with a delay when all cells are already added, i tried bringing it to front, i tried adding the view to tableview's subviews, but all in vain, it just never shows up. Here is my code:
func delay(delay:Double, closure:()->()) {
dispatch_after(
dispatch_time(
DISPATCH_TIME_NOW,
Int64(delay * Double(NSEC_PER_SEC))
),
dispatch_get_main_queue(), closure)
}
override func viewDidAppear(animated: Bool)
{
super.viewDidAppear(animated)
func c()
{
var v:UIView = UIView(frame:CGRectMake(0.0, 0.0, 40.0, 40.0))
v.backgroundColor = UIColor.greenColor()
v.center = CGPointMake(40.0, 40.0)
tableView!.addSubview(v)
tableView!.bringSubviewToFront(v)
}
delay(5.0, closure: c)
}
Any ideas? The problem is obviously related to Swift because in Objective-C it doesn't reproduce

Answer 1

First
I try this in a UITableViewController
- (void)viewDidLoad {
[super viewDidLoad];
UIView *view = [[UIView alloc] initWithFrame:CGRectMake(100, 100, 100, 100)];
view.backgroundColor = [UIColor redColor];
[self.view addSubview:view];
}
It works
Second
I notice that you add a view with CGRectMake(0.0, 0.0, 40.0, 40.0). So the view might under the navigation bar if you have one in your viewcontroller