控制器之间的过渡是跳跃的

Question

在控制器之间的转换时刻，我有一些小的黑色闪烁。 在我显示它之前，我必须向新控制器加载很多东西，然后我传递一些名为＆＃34; Art＆＃34;的UIImage参数。

let storyboard = UIStoryboard(name: "Main", bundle: nil)
let controller:ModelController = storyboard.instantiateViewController(withIdentifier: "ModController") as! ModelController
controller.artwork=art //pass this to load the new

let transition = CATransition()
transition.duration = 0.30
transition.type = kCATransitionPush
transition.subtype = kCATransitionFromRight
view.window!.layer.add(transition, forKey: kCATransition)
present(controller, animated: false, completion: nil)

在新控制器上，我在之后加载所有内容：

override func viewDidLoad() {

    super.viewDidLoad()
    //load scroller here