===================xib建立View

===========

import UIKit

class LYBMyHeaderView: UIView {

    override func awakeFromNib() {

super.awakeFromNib()

backgroundColor=UIColor.red

        self.frame=CGRect(x:0,y:0,width:WIDTH,height:200)

    }

}

===================使用：

  let v:LYBMyHeaderView=Bundle

      或者

   let nib = UINib(nibName: "LYBMyHeaderView", bundle: nil)

   let v = nib.instantiate(withOwner: nil, options: nil)[0] as! LYBMyHeaderView

======================xib建立控制器

使用：

let infovc=LYBInfoVC

  self.navigationController?.pushViewController(infovc, animated: true)

=====================storyBoard建立控制器

使用：let sb=UIStoryboard.init(name: "LYIn", bundle: nil)

let infovc = sb.instantiateInitialViewController()as! LYBInfoVC

        self.navigationController?.pushViewController(infovc, animated: true