Swift加载Xib创建的Controller

Xib显示如下: <注意箭头处即可>

按住Control键,点击Files'owner拖动到View即可.

加载该控制器如下:

func registerClick() {

        let registerVc = RegisterViewController()
        registerVc.title = "注册"
        self.navigationController?.pushViewController(registerVc, animated: true)
    }