Question

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…

然后我们放置一个等待上述动画完成的DispatchQueue计时器（时间延迟等于animationDuration），然后我们重复上面的第一步并生成另一个随机数，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]
}
```
理论上，这个随机动画可以无限期播放，直到用户移过这个场景。

到目前为止，这是我的代码：

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]

    }
}

Answer 1

您可以使用UIView.animate(withDuration: delay: options: animations:) api。注意延迟参数将允许您在一定延迟后开始动画。

如何在Swift 3.0中使用动画创建时间延迟

1 个答案: