ForceViewOrientation.swift

class ViewController: UIViewController {

  override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
    
    // Force view follow specific orientation
    let value = UIInterfaceOrientation.LandscapeRight.rawValue
    UIDevice.currentDevice().setValue(value, forKey: "orientation")
  }

  // This method was called first to ask about supported orientation
  override func supportedInterfaceOrientations() -> UIInterfaceOrientationMask {
    return [UIInterfaceOrientationMask.Landscape]
  }
  
  // This method was called second if view allow rotating
  override func shouldAutorotate() -> Bool {
    return true
  }
}

// If view controller not inside navigation controller then no need to override these function
// Orientation of view based on orientation of navigation view
// So set orientation of navigation view base on top view
extension UINavigationController {
  public override func shouldAutorotate() -> Bool {
    return visibleViewController!.shouldAutorotate()
  }
  
  public override func supportedInterfaceOrientations() -> UIInterfaceOrientationMask {
    return (visibleViewController?.supportedInterfaceOrientations())!
  }
}