IOS 反射按网上的操作不成功，怎么办？

Question

1. ViewController里的代码 ：

class ViewController: UIViewController {

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
    let anyobjectype : AnyObject.Type = (NSClassFromString("testReflect.ABC"))!
    // testReflect为项目的name, ABC为要加载的UIVIEW类的类名
    let nsobjectype : NSObject.Type = anyobjectype as! NSObject.Type
    let rec: AnyObject = nsobjectype
    let currentView: UIView = rec as! UIView
    
    self.view.addSubview(currentView)
}}

1. uiview 里的代码
   class ABC: UIView {

   override init(frame: CGRect) {

   super.init(frame: frame)
   //把背景色设为透明
   print("you got it override init")
   self.backgroundColor = UIColor.green

   }

   required init?(coder aDecoder: NSCoder) {

   fatalError("init(coder:) has not been implemented")
   

   }
   // Only override draw() if you perform custom drawing.
   // An empty implementation adversely affects performance during animation.
   override func draw(_ rect: CGRect) {

   print("you got it draw")
   //self.backgroundColor = UIColor.brown

   }

}

### 想通过一个uiview的类名的字符串(这里为"ABC")，来加载这个类？我用的反射，但没有成功，请问怎么改呢？

Answer 1

//  nsobjectype 是一个 Class    
let nsobjectype : NSObject.Type = anyobjectype as! NSObject.Type
//  rec 是一个 Class
let rec: AnyObject = nsobjectype
//  currentView 是一个 Class 
let currentView: UIView = rec as! UIView
//  currentView 应该是一个 object,
//  建议: let currentView: UIView = rec() as! UIView
//  需要把 currentView 实例化


//    self.view 直接 add 就崩溃了
self.view.addSubview(currentView)