How to create twitter tab bar push animation

user_12628719 0
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I have the following code:

    private var bounceAnimation: CAKeyframeAnimation = {
        let bounceAnimation = CAKeyframeAnimation(keyPath: "transform.scale")
        bounceAnimation.values = [1.0, 1.4, 0.9, 1.02, 1.0]
        bounceAnimation.duration = TimeInterval(0.3)
        bounceAnimation.calculationMode = CAAnimationCalculationMode.cubic
        return bounceAnimation
    }()

This creates the animation where the icon gets bigger and then smaller. I am trying to create the animation where the icon gets smaller and then back to normal like it's being pushed similar to twitter, Spotify, etc. I assume it's just changing around the bounce values all though I'm not sure how would I do this.

tabbar uiviewanimation swift xcode animation
1 Answers

I'd use a normal UIView.animate function like this:

UIView.animate(withDuration: 0.05, delay: 0, options: .curveLinear, animations: {
    view.transform = CGAffineTransform(scaleX: 1.05, y: 1.05)
}, completion: nil)

UIView.animate(withDuration: 0.3, delay: 0.05, usingSpringWithDamping: 0.2, initialSpringVelocity: 7, options: .curveEaseOut, animations: {
    view.transform = .identity
}, completion: nil)

Just change view to be whatever view you're trying to animate. Then mess around with the initial scale, the duration and the spring dampening to get the animation you want!

user_104535500
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