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94 lines
4.0 KiB
Swift
Executable File
94 lines
4.0 KiB
Swift
Executable File
//
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// NVActivityIndicatorAnimationLineSpinFadeLoader.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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import UIKit
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class NVActivityIndicatorAnimationLineSpinFadeLoader: NVActivityIndicatorAnimationDelegate {
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func setUpAnimation(in layer: CALayer, size: CGSize, color: UIColor) {
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let lineSpacing: CGFloat = 2
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let lineSize = CGSize(width: (size.width - 4 * lineSpacing) / 5, height: (size.height - 2 * lineSpacing) / 3)
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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 = 1.2
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let beginTime = CACurrentMediaTime()
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let beginTimes: [CFTimeInterval] = [0.12, 0.24, 0.36, 0.48, 0.6, 0.72, 0.84, 0.96]
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#if swift(>=4.2)
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let timingFunction = CAMediaTimingFunction(name: .easeInEaseOut)
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#else
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let timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseInEaseOut)
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#endif
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// Animation
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let animation = CAKeyframeAnimation(keyPath: "opacity")
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animation.keyTimes = [0, 0.5, 1]
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animation.timingFunctions = [timingFunction, timingFunction]
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animation.values = [1, 0.3, 1]
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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 lines
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for i in 0 ..< 8 {
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let line = lineAt(angle: CGFloat(Double.pi / 4 * Double(i)),
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size: lineSize,
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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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line.add(animation, forKey: "animation")
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layer.addSublayer(line)
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}
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}
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func lineAt(angle: CGFloat, size: CGSize, origin: CGPoint, containerSize: CGSize, color: UIColor) -> CALayer {
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let radius = containerSize.width / 2 - max(size.width, size.height) / 2
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let lineContainerSize = CGSize(width: max(size.width, size.height), height: max(size.width, size.height))
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let lineContainer = CALayer()
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let lineContainerFrame = 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: lineContainerSize.width,
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height: lineContainerSize.height)
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let line = NVActivityIndicatorShape.line.layerWith(size: size, color: color)
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let lineFrame = CGRect(
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x: (lineContainerSize.width - size.width) / 2,
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y: (lineContainerSize.height - size.height) / 2,
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width: size.width,
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height: size.height)
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lineContainer.frame = lineContainerFrame
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line.frame = lineFrame
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lineContainer.addSublayer(line)
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lineContainer.sublayerTransform = CATransform3DMakeRotation(CGFloat(Double.pi / 2) + angle, 0, 0, 1)
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return lineContainer
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}
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}
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