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64 lines
2.4 KiB
64 lines
2.4 KiB
// The MIT License (MIT)
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//
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// Copyright (c) 2016 Luke Zhao <me@lkzhao.com>
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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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import UIKit
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import QuartzCore
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public extension CAMediaTimingFunction {
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// default
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static let linear = CAMediaTimingFunction(name: CAMediaTimingFunctionName.linear)
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static let easeIn = CAMediaTimingFunction(name: CAMediaTimingFunctionName.easeIn)
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static let easeOut = CAMediaTimingFunction(name: CAMediaTimingFunctionName.easeOut)
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static let easeInOut = CAMediaTimingFunction(name: CAMediaTimingFunctionName.easeInEaseOut)
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// material
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static let standard = CAMediaTimingFunction(controlPoints: 0.4, 0.0, 0.2, 1.0)
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static let deceleration = CAMediaTimingFunction(controlPoints: 0.0, 0.0, 0.2, 1)
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static let acceleration = CAMediaTimingFunction(controlPoints: 0.4, 0.0, 1, 1)
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static let sharp = CAMediaTimingFunction(controlPoints: 0.4, 0.0, 0.6, 1)
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// easing.net
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static let easeOutBack = CAMediaTimingFunction(controlPoints: 0.175, 0.885, 0.32, 1.275)
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static func from(name: String) -> CAMediaTimingFunction? {
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switch name {
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case "linear":
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return .linear
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case "easeIn":
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return .easeIn
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case "easeOut":
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return .easeOut
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case "easeInOut":
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return .easeInOut
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case "standard":
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return .standard
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case "deceleration":
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return .deceleration
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case "acceleration":
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return .acceleration
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case "sharp":
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return .sharp
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default:
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return nil
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}
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}
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}
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