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93 lines
3.6 KiB
93 lines
3.6 KiB
// |
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// NVActivityIndicatorAnimationBallSpinFadeLoader.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 NVActivityIndicatorAnimationBallSpinFadeLoader: 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 - 4 * circleSpacing) / 5 |
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let x = (layer.bounds.size.width - size.width) / 2 |
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let y = (layer.bounds.size.height - size.height) / 2 |
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let duration: CFTimeInterval = 1 |
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let beginTime = CACurrentMediaTime() |
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let beginTimes: [CFTimeInterval] = [0, 0.12, 0.24, 0.36, 0.48, 0.6, 0.72, 0.84] |
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// Scale animation |
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let scaleAnimation = CAKeyframeAnimation(keyPath: "transform.scale") |
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scaleAnimation.keyTimes = [0, 0.5, 1] |
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scaleAnimation.values = [1, 0.4, 1] |
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scaleAnimation.duration = duration |
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// Opacity animation |
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let opacityAnimaton = CAKeyframeAnimation(keyPath: "opacity") |
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opacityAnimaton.keyTimes = [0, 0.5, 1] |
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opacityAnimaton.values = [1, 0.3, 1] |
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opacityAnimaton.duration = duration |
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// Animation |
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let animation = CAAnimationGroup() |
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animation.animations = [scaleAnimation, opacityAnimaton] |
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animation.timingFunction = CAMediaTimingFunction(name: .linear) |
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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 ..< 8 { |
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let circle = circleAt(angle: CGFloat(Double.pi / 4) * CGFloat(i), |
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size: circleSize, |
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origin: CGPoint(x: x, y: y), |
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containerSize: size, |
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color: color) |
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animation.beginTime = beginTime + beginTimes[i] |
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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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func circleAt(angle: CGFloat, size: CGFloat, origin: CGPoint, containerSize: CGSize, color: UIColor) -> CALayer { |
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let radius = containerSize.width / 2 - size / 2 |
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let circle = NVActivityIndicatorShape.circle.layerWith(size: CGSize(width: size, height: size), color: color) |
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let frame = CGRect( |
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x: origin.x + radius * (cos(angle) + 1), |
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y: origin.y + radius * (sin(angle) + 1), |
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width: size, |
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height: size) |
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circle.frame = frame |
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return circle |
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} |
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} |
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#endif
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