Ios 在情节提要中添加第二个viewcontroller时，uiview.animate停止工作

我已经创建了一个简单的动画，显示了一个硬币的脉动，它工作得非常好，直到我在故事板上的动画之前添加了viewcontroller

在用这个动画显示屏幕之前，我想在我的游戏中有一个菜单屏幕

这是动画的代码：

让imageView:UIImageView=coinImageView[0]
UIView.animate（持续时间：0.5，
延迟：0.1，
选项：[
.重复一遍，
.自动翻转，
.curveEaseIn，
.allowUserInteraction
], 
动画：{
imageView.transform=CGAffineTransform（scaleX:1.5，y:1.5）
}
)

第一个视图（带菜单）如下所示：

class MenuViewController: UIViewController {

        @IBAction func newGameButton(_ sender: Any) {
            let viewController = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "ViewController") as! ViewController
            self.present(viewController, animated: true, completion: nil)
            viewController.newGame()
        }
    
    override func viewDidLoad() {
        super.viewDidLoad()
    }
}

    class ViewController: UIViewController, SavingViewControllerDelegate, UICollectionViewDelegate, UICollectionViewDataSource {
        var coinImageView: [UIImageView] = []

func grantCoins(n: Int) {
        let coinCount = coin.count
        for i in coinCount...(coinCount+n) {
            coin.append(UIImage(named: "coin.png")!)
            coinImageView.append(UIImageView(image: coin[i]))
            coinImageView[i].isUserInteractionEnabled = true
            coinImageView[i].addGestureRecognizer(UIPanGestureRecognizer(target: self, action: #selector(self.handlePan(_:))))
            coinImageView[i].frame = CGRect(x: 147, y: -100, width: 60, height: 60)
            view.addSubview(coinImageView[i])
            
            let finalPoint = CGPoint(
                 x: 177,
                 y: 278
               )
            generateNewCoin(gestureView: coinImageView[i])
        }
        view.bringSubviewToFront(coinImageView[0])
    }
    
        func newGame() { 
            animateFirstCoin()
        }
    
        func animateFirstCoin() {
            let imageView: UIImageView = coinImageView[0]
    
            UIView.animate( 
                withDuration: 0.5,
                delay: 0.1,
                options: [.repeat, .autoreverse, .curveEaseIn, .allowUserInteraction],
                animations: {
                    imageView.transform = CGAffineTransform(scaleX: 1.5, y: 1.5)
            })
        }
    }

第二个viewcontroller（带有动画的）如下所示：

class MenuViewController: UIViewController {

        @IBAction func newGameButton(_ sender: Any) {
            let viewController = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "ViewController") as! ViewController
            self.present(viewController, animated: true, completion: nil)
            viewController.newGame()
        }
    
    override func viewDidLoad() {
        super.viewDidLoad()
    }
}

    class ViewController: UIViewController, SavingViewControllerDelegate, UICollectionViewDelegate, UICollectionViewDataSource {
        var coinImageView: [UIImageView] = []

func grantCoins(n: Int) {
        let coinCount = coin.count
        for i in coinCount...(coinCount+n) {
            coin.append(UIImage(named: "coin.png")!)
            coinImageView.append(UIImageView(image: coin[i]))
            coinImageView[i].isUserInteractionEnabled = true
            coinImageView[i].addGestureRecognizer(UIPanGestureRecognizer(target: self, action: #selector(self.handlePan(_:))))
            coinImageView[i].frame = CGRect(x: 147, y: -100, width: 60, height: 60)
            view.addSubview(coinImageView[i])
            
            let finalPoint = CGPoint(
                 x: 177,
                 y: 278
               )
            generateNewCoin(gestureView: coinImageView[i])
        }
        view.bringSubviewToFront(coinImageView[0])
    }
    
        func newGame() { 
            animateFirstCoin()
        }
    
        func animateFirstCoin() {
            let imageView: UIImageView = coinImageView[0]
    
            UIView.animate( 
                withDuration: 0.5,
                delay: 0.1,
                options: [.repeat, .autoreverse, .curveEaseIn, .allowUserInteraction],
                animations: {
                    imageView.transform = CGAffineTransform(scaleX: 1.5, y: 1.5)
            })
        }
    }

---

这个问题有什么明显的解释吗？

经过一天毫无结果的研究，我终于找到了答案。 当第一个硬币生成时，视图还不可见，因为动画不起作用。另一批硬币很好。 我只是在函数中输入以下代码来检查：

if (view.window == nil) {
    print("view is not visible")
} else {
    print("view is visible")
}

---

谢谢

从何处填充coinImageView字段？好问题，我已更新了问题描述。