将视图控制器主视图（self.view）子视图移动到scrollview

Question

1. 我有视图控制器的子视图＆amp;应用约束。
2. 问题：我要做的是以编程方式添加scrollview 只有iPhone 4s设备在scrollview中包含self.view的所有子视图。

3. scrollview应包含self.view的所有子视图（我使用self.view.subviews添加）。

   1. 我试过的代码

   如果DeviceType.IS_IPHONE_4_OR_LESS {

       //Add Scrollview to self.view
       let scrollview : UIScrollView = UIScrollView(frame: CGRectMake(0,0,320,480))
       scrollview.showsVerticalScrollIndicator = true;
       scrollview.scrollEnabled = true;
       scrollview.userInteractionEnabled = true;
   
      // scrollview.addSubview(self.view) /
   
       let total : NSArray = (self.view.subviews as NSArray).copy() as! NSArray
   
       //Add elements to scrollview but subviewes don't get scroll
       for subview in total
       {
           scrollview.addSubview(subview as! UIView)
       }
       /// Results in blank white screen. Reason: May be scrollview & self.view pointing to same objects
       for subview in self.view.subviews {
   
           subview.removeFromSuperview()
       }
   
      self.view.addSubview(scrollview)
   
       scrollview.contentSize = CGSizeMake(self.view.bounds.size.width,  self.view.bounds.size.height+200)
   
       }
   

   2. 我知道Size class＆amp;给问题可以解决。

   3. 我也知道在故事板中添加scrollview＆amp;隐藏所有设备，除了iPhone 4s可能有效。