Pulse is not centered to view

[kevinluscii]

Hi, I'm trying to get a nice pulse below a round avatar view. The UIImageView itself is a rectangle spanning the entire screen, its image is a circle with aspect fit. When I add the pulsator view like this:

    let pulsator = Pulsator()
    pulsator.radius = 500
    pulsator.numPulse = 3
    pulsator.pulseInterval = 3
    pulsator.animationDuration = 5
    pulsator.backgroundColor = UIColor(red: 0, green: 0.623, blue: 0.890, alpha: 0.3).cgColor
    self.avatarImageView.addSublayer(pulsator)
    pulsator.start()

It works but the pulse comes from the top left of the UIImageView. I want it to spawn pulses from the center of the image, which is also the center of the UIImageView itself. How can I change the pulsator's position? Or how can I center it properly to the view?

[Kaakati]

@kevinluscii Possible duplicate #17