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    <p><code>CAAnimationGroup</code> is meant for having multiple <code>CAAnimation</code> subclasses being stacked together to form an animation, for instance, one animation can perform an scale, the other moves it around, while a third one can rotate it, it's not meant for managing multiple layers, but for having multiple overlaying animations.</p> <p>That said, I think the easiest way to solve your issue, is to assign each <code>CAAnimation</code> a <code>beginTime</code> equivalent to the sum of the durations of all the previous ones, to illustrate:</p> <pre><code>for i in 0 ..&lt; 20 { let view : UIView = // Obtain/create the view...; let bounce = CAKeyframeAnimation(keyPath: "transform.scale") bounce.duration = 0.5; bounce.beginTime = CACurrentMediaTime() + bounce.duration * CFTimeInterval(i); // ... view.layer.addAnimation(bounce, forKey:"anim.bounce") } </code></pre> <p>Notice that everyone gets <code>duration * i</code>, and the <code>CACurrentMediaTime()</code> is a necessity when using the <code>beginTime</code> property (it's basically a high-precision timestamp for "now", used in animations). The whole line could be interpreted as <code>now + duration * i</code>.</p> <p>Must be noted, that if a <code>CAAnimation</code>s is added to a <code>CAAnimationGroup</code>, then its <code>beginTime</code> becomes relative to the group's begin time, so a value of <code>5.0</code> on an animation, would be <code>5.0</code> seconds after the whole group starts. In this case, you don't use the CACurrentMediaTime()</p>
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