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39 lines
1.2 KiB
Swift
39 lines
1.2 KiB
Swift
enum PresentationStepChangeAnimation {
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case none
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case slide
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case slideAndBounce
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}
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final class ModalPresentationAnimator {
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private enum Constants {
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static let animationDuration: TimeInterval = kDefaultAnimationDuration
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static let springDamping: CGFloat = 0.85
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static let springVelocity: CGFloat = 0.2
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}
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static func animate(with stepAnimation: PresentationStepChangeAnimation = .slide,
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animations: @escaping (() -> Void),
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completion: ((Bool) -> Void)?) {
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switch stepAnimation {
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case .none:
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animations()
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completion?(true)
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case .slide:
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UIView.animate(withDuration: Constants.animationDuration,
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delay: 0,
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options: .curveEaseOut,
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animations: animations,
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completion: completion)
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case .slideAndBounce:
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UIView.animate(withDuration: Constants.animationDuration,
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delay: 0,
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usingSpringWithDamping: Constants.springDamping,
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initialSpringVelocity: Constants.springVelocity,
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options: .curveLinear,
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animations: animations,
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completion: completion)
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}
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}
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}
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