问题描述

我有 8 个要添加动画的 UImageView.我知道我可以制作八次动画，但我可以使用循环——也许是插值——来实现它吗?

I have 8 UImageViews that I am adding animations to. I know I can make the animation eight times, but can I use a loop -and maybe interpolation- for it?

这是我的动画代码:

override func viewDidLoad() {
        super.viewDidLoad()

        self.dieImage0.animationImages = [
            UIImage(named: "dicey-die1")!,
            UIImage(named: "dicey-die2")!,
            UIImage(named: "dicey-die3")!,
            UIImage(named: "dicey-die4")!,
            UIImage(named: "dicey-die5")!,
            UIImage(named: "dicey-die6")!,
            UIImage(named: "dicey-die1")!,
            UIImage(named: "dicey-die2")!,
            UIImage(named: "dicey-die3")!,
            UIImage(named: "dicey-die4")!,
            UIImage(named: "dicey-die5")!,
            UIImage(named: "dicey-die6")!,
            UIImage(named: "dicey-die1")!,
            UIImage(named: "dicey-die2")!,
            UIImage(named: "dicey-die3")!,
            UIImage(named: "dicey-die4")!,
            UIImage(named: "dicey-die5")!,
            UIImage(named: "dicey-die6")!,
            UIImage(named: "dicey-die1")!,
            UIImage(named: "dicey-die2")!,
            UIImage(named: "dicey-die3")!,
            UIImage(named: "dicey-die4")!,
            UIImage(named: "dicey-die5")!,
            UIImage(named: "dicey-die6")!
        ]

        self.dieImage0.animationRepeatCount = 1
        self.dieImage0.animationDuration = 1.0


    }

对于开始动画:

override func motionEnded(motion: UIEventSubtype, withEvent event: UIEvent) {

        self.dieImage0.startAnimating()  /* <======== */

        dieImage0.image = randomImages.randomDice();
        dieImage1.image = randomImages.randomDice();
        dieImage2.image = randomImages.randomDice();
        dieImage3.image = randomImages.randomDice();
        dieImage4.image = randomImages.randomDice();
        dieImage5.image = randomImages.randomDice();
        dieImage6.image = randomImages.randomDice();
        dieImage7.image = randomImages.randomDice();

        println("Motion Ended")
    }

我想为每个 dieImage

我有几个 UIImageView 和 @IBOutlet 我想制作动画.

I have several UIImageViews with @IBOutlets that I want to animate.

    @IBOutlet weak var dieImage0: UIImageView!
    @IBOutlet weak var dieImage1: UIImageView!
    @IBOutlet weak var dieImage2: UIImageView!
    @IBOutlet weak var dieImage3: UIImageView!
    @IBOutlet weak var dieImage4: UIImageView!
    @IBOutlet weak var dieImage5: UIImageView!
    @IBOutlet weak var dieImage6: UIImageView!
    @IBOutlet weak var dieImage7: UIImageView!

如何循环播放它们而不是为每个动画制作单独的动画，我已经有了一个动画设置；见上文.

How do I loop through them instead of making a separate animation for each, I already have one animation setup; see above.

除了两个骰子反叛之外，一切都按预期进行.第一个 (dieImage0) 始终落在 1 上，第二个 (dieImage5) 根本不会做任何事情！

Everything is working as wanted except two dice have rebelled. The first one (dieImage0) consistently lands on a 1, the second one (dieImage5) won't do anything at all!

这是我用于动画的代码:

This is the code I used for my animation:

let dieImages = [dieImage0, dieImage1, dieImage2, dieImage3, dieImage4, dieImage5, dieImage6, dieImage7]

for die in dieImages {
    die.animationImages = [
        UIImage(named: "dicey-die2")!,
        UIImage(named: "dicey-die6")!,
        UIImage(named: "dicey-die1")!,
        UIImage(named: "dicey-die4")!,
        UIImage(named: "dicey-die3")!,
        UIImage(named: "dicey-die5")!,
        UIImage(named: "dicey-die3")!,
        UIImage(named: "dicey-die1")!,
        UIImage(named: "dicey-die6")!,
        UIImage(named: "dicey-die3")!,
        UIImage(named: "dicey-die5")!,
        UIImage(named: "dicey-die2")!,
        UIImage(named: "dicey-die4")!
    ]

    die.animationRepeatCount = 1
    die.animationDuration = 1.0
}

现在一切正常！

推荐答案

要创建 animationImages，我会这样做:

To create the animationImages, I would do this:

dieImage0.animationImages = (0..<4).reduce([UIImage]()) { images, _ in
    return images + (1..<7).map { UIImage(named: "dicey-die($0)")! }
}

看起来 animationImages 由 24 个 UIImages - 4 组 6 个图像组成，其中图像的名称是 "dicey-dieN", (N 替换为 (1..<7) 范围内的数字.)

It looks like animationImages consists of 24 UIImages - 4 sets of 6 images, where the name of the image is "dicey-dieN", (N is replaced by a number in the range (1..<7).)

您可以像这样创建一个包含六个图像的数组:

You can create a single array of six images like this:

let images = (1..<7).map { UIImage(named: "dicey-die($0)")! }

您想这样做 4 次，然后将所有数组加在一起.你可以通过调用 (0..<4).reduce([UIImage]()) { ... }

You want to do that 4 times, and add all the arrays together. You do that with the call to (0..<4).reduce([UIImage]()) { ... }

结果将是一个包含 24 个图像的数组.

The result will be a single array with 24 images.

然后，正如@Chris Slowik 建议的那样，创建一个 dieImages 数组，然后遍历它们以分配随机图像:

Then, as @Chris Slowik suggested, create an array of dieImages and then loop through them to assign the random image:

let dieImages = [dieImage0, dieImage1, dieImage2, dieImage3, dieImage4, dieImage5, dieImage6, dieImage7]

for dieImage in dieImages {
    dieImage.image = randomImages.randomDice()
    dieImage.startAnimating()
}

您的整个 motionEnded 方法应该如下所示:

Your entire motionEnded method should probably look something like this:

override func motionEnded(motion: UIEventSubtype, withEvent event: UIEvent) {
    let dieImages = [dieImage0, dieImage1, dieImage2, dieImage3, dieImage4, dieImage5, dieImage6, dieImage7]

    for dieImage in dieImages {
        dieImage.image = randomImages.randomDice()
        dieImage.startAnimating()
    }

}

我认为您在使用 dieImage0 时遇到了问题，因为您在为其分配随机图像之前就开始了动画.先分配图像，然后开始制作动画.

I think you were running into problems with dieImage0 because you were starting the animation before you assigned it a random image. Assign the image first, and then start animating.

这篇关于使用循环向多个 UIImageViews 添加属性的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持编程学习网！