class TestCustomViewController: UIViewController {

@IBOutlet weak var container : UIView?

@IBOutlet weak var container2 : UIView?

@IBOutlet weak var container3 : UIView?

var testView: CustomView!
var testView2: CustomView!
var testView3: CustomView!
override func viewDidLoad() {
    super.viewDidLoad()
    ////////First View//////
   testView = createGearItemView()
    testView.frame = (container?.frame)!
    container?.addSubview(testView)
    /////////Second View//////
    testView2 = createGearItemView()
    testView2.frame = (container2?.frame)!
    container2?.addSubview(testView2)
    ////// THird View/////////
    testView3 = createGearItemView()
    testView3.frame = (container3?.frame)!
    container3?.addSubview(testView3)
}

func createGearItemView () -> CustomView {
    let view = (Bundle.main.loadNibNamed("CustomView", owner: nil, options: nil)?.first as? CustomView)!

    view.backgroundColor = UIColor.clear
    return view
}

}