i guess i am missing something with the UISegmentedControl and auto layout.

i have a TabbedApplication (UITabBarController), and i created a new UIViewController to act as tab. to the new view i added UISegmentedControl, and place it to top using auto layout.

i guess i don't understand completely something , cause the UISegmentedControl is hiding under the titleBar . can u help me understand what i am missing ? thank you .

import Foundation
import UIKit;

class ViewLikes:UIViewController {

override func viewDidLoad()  {
    super.viewDidLoad()
    title = "some title";


    var segmentControl:UISegmentedControl = UISegmentedControl(items:["blash", "blah blah"]);
    segmentControl.selectedSegmentIndex = 1;


    segmentControl.setTranslatesAutoresizingMaskIntoConstraints(false)
    self.view.addSubview(segmentControl)

    //Set layout
    var viewsDict = Dictionary <String, UIView>()
    viewsDict["segment"] = segmentControl;

    //controls
    self.view.addConstraints(NSLayoutConstraint.constraintsWithVisualFormat("H:|-[segment]-|",
        options: NSLayoutFormatOptions.AlignAllCenterX,
        metrics: nil,
        views: viewsDict))

    self.view.addConstraints(NSLayoutConstraint.constraintsWithVisualFormat("V:|-[segment]",
        options: NSLayoutFormatOptions(0),
        metrics: nil,
        views: viewsDict))
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}
}