CustomClass.Swift

@IBOutlet weak var barLbl: UILabel!
@IBDesignable class CustomControl: UIView {
@IBInspectable var lblSetGetName : String! {
    set{barLbl.text = newValue}
    get{return barLbl.text}
}

class ViewController: UIViewController {

override func viewDidLoad() {
    super.viewDidLoad()
    let CustomControlObj : CustomControl!

    var lblName = CustomControlObj.lblSetGetName
    CustomControlObj.lblSetGetName = "New Txt"
}

let customControlObj  = (Bundle.main.loadNibNamed("CustomView", owner: self, options: nil))?[0] as! CustomControl