Created
August 7, 2017 23:07
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import UIKit | |
import PlaygroundSupport | |
class ViewController: UIViewController { | |
let scale = CGAffineTransform.init(scaleX: 0.9, y: 0.9) | |
let rotation = CGAffineTransform.init(rotationAngle: .pi / 2) | |
let blue = UIColor(red: 0.25, green: 0.85, blue: 1, alpha: 1) | |
let red = UIColor(red: 1, green: 0.55, blue: 0.55, alpha: 1) | |
var state = 0 | |
override func loadView() { | |
let background = UIView() | |
background.backgroundColor = .white | |
let rectangle = UIView() | |
rectangle.frame = CGRect(x: 92.5, y: 230, width: 170, height: 170) | |
values(rectangle, true) | |
let gesture = UITapGestureRecognizer() | |
gesture.addTarget(self, action: #selector(tapGesture)) | |
rectangle.addGestureRecognizer(gesture) | |
background.addSubview(rectangle) | |
view = background | |
} | |
@objc func tapGesture(gesture: UITapGestureRecognizer) { | |
guard let view = gesture.view else { return } | |
let condition = state == 1 | |
let spring = UISpringTimingParameters(mass: 3, stiffness: 800, damping: 40, initialVelocity: .zero) | |
let animation = UIViewPropertyAnimator(duration: 0, timingParameters: spring) | |
animation.addAnimations { | |
self.values(view, condition) | |
} | |
state = condition ? 0 : 1 | |
animation.startAnimation() | |
} | |
func values(_ view: UIView, _ initial: Bool) { | |
view.transform = initial ? .identity : rotation.concatenating(scale) | |
view.backgroundColor = initial ? blue : red | |
view.layer.cornerRadius = initial ? 60 : 85 | |
} | |
} | |
PlaygroundPage.current.liveView = ViewController() |
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