Specifies the delay, in seconds, between replicated copies. Animatable.
SDKs
- iOS 3.0+
- macOS 10.6+
- Mac Catalyst 13.0+
- tvOS 9.0+
Framework
- Core Animation
Declaration
var instanceDelay: CFTimeDiscussion
The default value is 0, meaning that any animations added to replicated copies will be synchronized.
The following code shows a replicator layer being used to create an animated activity monitor. The replicator layer creates 30 small circles forming a larger circle. The source layer, circle, has a 1 second animated fade out and each of the copies offsets the time of the animation by 1 / 30 seconds.
let replicatorLayer = CAReplicatorLayer()
let circle = CALayer()
circle.frame = CGRect(origin: CGPoint.zero,
size: CGSize(width: 10, height: 10))
circle.backgroundColor = NSColor.blue.cgColor
circle.cornerRadius = 5
circle.position = CGPoint(x: 0, y: 50)
replicatorLayer.addSublayer(circle)
let fadeOut = CABasicAnimation(keyPath: "opacity")
fadeOut.fromValue = 1
fadeOut.toValue = 0
fadeOut.duration = 1
fadeOut.repeatCount = Float.greatestFiniteMagnitude
circle.add(fadeOut, forKey: nil)
let instanceCount = 30
replicatorLayer.instanceCount = instanceCount
replicatorLayer.instanceDelay = fadeOut.duration / CFTimeInterval(instanceCount)
let angle = -CGFloat.pi * 2 / CGFloat(instanceCount)
replicatorLayer.instanceTransform = CATransform3DMakeRotation(angle, 0, 0, 1)
The following illustration shows the result of the above code:
Activity monitor created with a replicator layer.
