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70 lines
2.9 KiB
70 lines
2.9 KiB
1 year ago
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// NVActivityIndicatorAnimationBallPulseSync.swift
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// NVActivityIndicatorView
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//
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// The MIT License (MIT)
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// Copyright (c) 2016 Vinh Nguyen
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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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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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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 THE
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// SOFTWARE.
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//
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#if canImport(UIKit)
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import UIKit
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class NVActivityIndicatorAnimationBallPulseSync: NVActivityIndicatorAnimationDelegate {
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func setUpAnimation(in layer: CALayer, size: CGSize, color: UIColor) {
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let circleSpacing: CGFloat = 2
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let circleSize = (size.width - circleSpacing * 2) / 3
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let x = (layer.bounds.size.width - size.width) / 2
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let y = (layer.bounds.size.height - circleSize) / 2
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let deltaY = (size.height / 2 - circleSize / 2) / 2
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let duration: CFTimeInterval = 0.6
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let beginTime = CACurrentMediaTime()
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let beginTimes: [CFTimeInterval] = [0.07, 0.14, 0.21]
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let timingFunciton = CAMediaTimingFunction(name: .easeInEaseOut)
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// Animation
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let animation = CAKeyframeAnimation(keyPath: "transform.translation.y")
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animation.keyTimes = [0, 0.33, 0.66, 1]
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animation.timingFunctions = [timingFunciton, timingFunciton, timingFunciton]
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animation.values = [0, deltaY, -deltaY, 0]
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animation.duration = duration
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animation.repeatCount = HUGE
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animation.isRemovedOnCompletion = false
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// Draw circles
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for i in 0 ..< 3 {
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let circle = NVActivityIndicatorShape.circle.layerWith(size: CGSize(width: circleSize, height: circleSize), color: color)
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let frame = CGRect(x: x + circleSize * CGFloat(i) + circleSpacing * CGFloat(i),
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y: y,
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width: circleSize,
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height: circleSize)
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animation.beginTime = beginTime + beginTimes[i]
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circle.frame = frame
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circle.add(animation, forKey: "animation")
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layer.addSublayer(circle)
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}
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}
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}
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#endif
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