First import UIVVMaterialComponent
      in your swift file
      
      import UIVVMaterialComponent
      
      and then in your viewDidLoad create it 

      override func viewDidLoad() {
        super.viewDidLoad()
    
        let spinner = UIVVMaterialSpinner.init()
        spinner.frame = CGRect(x: 50, y: 50, width: 50, height: 50)
        spinner.beginRefreshing()
        self.view.addSubview(spinner)
            
    }