如何將ImageView添加到自定義Segue中？

Question

我試圖在動畫的順序去

1 UIViewController中創建一個自定義賽格瑞 - > ImageView的 - >第2的UIViewController

我作品中的代碼，但由於某些原因，ImageView的是黑色的。我試過使用各種圖像和文字圖像來源，但它仍然是黑色的。

這裏的一些圖片，更好understanding-

1（作爲第一UIViewController中由ImageView的替換）

2（作爲ImageView的是由第二個UIViewController取代）

/** 
This segue transitions by dragging the destination UIViewController in from the right and replacing the old UIViewController by pushing it off to the left. This Segue also contains an ImageView that is between the two UIViewControllers. 
*/ 
class CustomSegue2: UIStoryboardSegue { 

    override func perform() { 

     // Assign the source and destination views to local variables. 
     let firstView = self.source.view as UIView! 
     let secondView = UIImageView() 
     let thirdView = self.destination.view as UIView! 

     // Get the screen width and height. 
     let width = UIScreen.main.bounds.size.width 
     let height = UIScreen.main.bounds.size.height 

     // Set properties of secondView 
     secondView.frame = CGRect(x: width, y: 0, width: width, height: height) 
     secondView.contentMode = UIViewContentMode.scaleToFill 
     secondView.image = #imageLiteral(resourceName: "orangeRedGradient_MESH_tealGreenGradient") 

     // Specify the initial position of the destination view. 
     let rect = CGRect(x: width + width, y: 0.0, width: width, height: height) 
     thirdView?.frame = rect 

     // Access the app's key window and insert the destination view above the current 
     let window = UIApplication.shared.keyWindow 
     window?.insertSubview(thirdView!, aboveSubview: firstView!) 


     // Animation the transition. 
     UIView.animate(withDuration: 10, animations: {() -> Void in 
      firstView?.frame = firstView!.frame.offsetBy(dx: -width-width, dy: 0.0) 
      secondView.frame = secondView.frame.offsetBy(dx: -width-width, dy: 0.0) 
      thirdView?.frame = thirdView!.frame.offsetBy(dx: -width-width, dy: 0.0) 
     }) { (Finished) -> Void in 
      self.source.present(self.destination, animated: false, completion: nil) 
     } 
    } 

} 

Answer 1

secondView，因爲在任何時候你將其插入接口永遠不會出現。如果你想自定義轉換，你應該編寫適當的自定義轉換動畫代碼，但是這回答了爲什麼圖像視圖是「黑色」的問題 - 它是不是黑色，它是完全缺席。）