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iOS

Posted by Caleb Kleveter
Caleb Kleveter
Treehouse Moderator 37,862 Points

Using an image based animations using Swift.

I am trying to implement an image based animation using Swift. I have the image array, duration, and repeat count in the viewDidLoad.

 override func viewDidLoad() {
    super.viewDidLoad()

    var animationImages:[UIImage] = [
        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")!
    ]

    var animationDuration: NSTimeInterval = 1.0
    var animationRepeatCount: Int = 1

}

With the auto complete I am supposed to use The CAAnimation property animationDidStart(), in the parentheses it says to use anim: CAAnimation! How do I use it? I am trying to animate some dice in my motionEnded function.

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

    animationDidStart(anim: CAAnimation!)

    println("Motion Ended")
}

I have several 2D images of dice, I want to make an animation of the dice rolling by displaying multiple images in succession. I think I have everything ready, but I don't know how to start the animation when there is a shake gesture

1 Answer

Caleb Kleveter
Caleb Kleveter
Treehouse Moderator 37,862 Points

I figured this one out, I needed to use the startAnimating() method, like so:

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

    dieImage0.startAnimating()  <===========
    println("Motion Ended")
}