46 lines
1.9 KiB
Swift
46 lines
1.9 KiB
Swift
//
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// Copyright (c) 2017 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 QuartzCore
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extension CABasicAnimation {
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static let rotationKeyPath = "transform.rotation.z"
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static func zRotationAnimationWith(duration: CFTimeInterval = 1,
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repeatCount: Float = .infinity,
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clockwise: Bool = true) -> CABasicAnimation {
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let animation = CABasicAnimation(keyPath: CABasicAnimation.rotationKeyPath)
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let direction = clockwise ? 1.0 : -1.0
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animation.toValue = NSNumber(value: .pi * 2 * direction)
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animation.duration = duration
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animation.isCumulative = true
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animation.repeatCount = repeatCount
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if repeatCount == .infinity {
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animation.isRemovedOnCompletion = false
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}
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return animation
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}
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}
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