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Video Tutorial: Intermediate iOS Animation Part 6: Layer Springs

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1

In this video tutorial, you'll create spring animations for your layers.

This is a companion discussion topic for the original entry at https://www.raywenderlich.com/3270-intermediate-ios-animation/lessons/7
2

There is an issue in the starter project for this lesson if you’re running it on Swift 3

on line 190 ViewController extension needs to be implement CAAnimationDelegate protocol. You also needs to remove the override for animationDidStop so you end up with this:

extension ViewController: CAAnimationDelegate {
  
   func animationDidStop(_ anim: CAAnimation, finished flag: Bool) {
    guard let name = anim.value(forKey: "name") as? String,
      let layer = anim.value(forKey: "layer") as? CALayer else {
        return
    }
    
    if name == "form" {
      let bounce = CABasicAnimation(keyPath: "transform.scale")
      bounce.fromValue = 1.2
      bounce.toValue = 1.0
      bounce.duration = 0.5
      layer.add(bounce, forKey: nil)
    } else if name == "cloud" {
      layer.frame.origin.x = -layer.frame.size.width
      delay(seconds: 0.1, completion: {
        self.animateCloud(layer)
      })
    }
  }
}

also change all the delegates for your animation to self instead of self as! CAAnimationDelegate
This should happen on line 180 for cloudMove and flyRight

3

indeed the code in these projects isn’t iOS10 compatible, but an update for this course is in the works: https://videos.raywenderlich.com/schedule