49 lines
2.0 KiB
Swift
49 lines
2.0 KiB
Swift
//
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// Copyright (c) 2018 Touch Instinct
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the Software), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED AS IS, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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//
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import RxSwift
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private extension Double {
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static let halfPeriod = 0.5
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}
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public extension UIImageView {
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/// Rotates image view by 180 degrees via transform property with animation.
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var expandRotationBinder: Binder<Bool> {
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return Binder(self) { view, isExpanded in
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let angle = isExpanded ? CGFloat.pi / 2 : -CGFloat.pi / 2
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UIView.animateKeyframes(withDuration: CATransaction.animationDuration(), delay: 0, options: [], animations: {
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UIView.addKeyframe(withRelativeStartTime: 0, relativeDuration: .halfPeriod, animations: {
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view.transform = view.transform.rotated(by: angle)
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})
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UIView.addKeyframe(withRelativeStartTime: .halfPeriod, relativeDuration: .halfPeriod, animations: {
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view.transform = view.transform.rotated(by: angle)
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})
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})
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}
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}
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}
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