如何在Swift 3.0中通过动画创建延时

1. 首先,我们生成一个随机数(例如从0到10):

   If randomNumber = 0
       Animate imageSet0 [here we create an ImageArray and an animate function – please see code below)
   Else if randomNumber = 1
       Animate imageSet1
   Else if randomNumber = 2
       Animate imageSet2
   And so on…
   

2. 然后我们放置一个 DispatchQueue 等待上述动画完成的计时器(延时等于 animationDuration ),然后重复上述第一步,生成另一个随机数并播放另一个动画集:

   DispatchQueue.main.asyncAfter(deadline: .now() + imageView.animationDuration) {
      [Insert code that repeats the first step above and generates another random number to play another animation set]
   }
   

3. 理论上,这种随机动画可以无限期播放,直到用户经过该场景。

以下是我目前的代码:

func createImageArray(total: Int, imagePrefix: String) -> [UIImage]{
    var imageArray: [UIImage] = []
    for imageCount in 0..<total {
        let imageName = "\(imagePrefix)-\(imageCount).png"
        let image = UIImage(named: imageName)!

        imageArray.append(image)
    }

    return imageArray

}


func animate(imageView: UIImageView, images: [UIImage]){
    imageView.animationImages = images
    imageView.animationDuration = 1.0
    imageView.animationRepeatCount = 1
    imageView.startAnimating()

    DispatchQueue.main.asyncAfter(deadline: .now() + imageView.animationDuration) {

[Create code that repeats the first step above and generates another random number to play another animation set]

    }
}