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72 lines
2.5 KiB
72 lines
2.5 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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protocol HeroProgressRunnerDelegate: class {
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func updateProgress(progress: Double)
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func complete(finished: Bool)
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}
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class HeroProgressRunner {
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weak var delegate: HeroProgressRunnerDelegate?
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var isRunning: Bool {
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return displayLink != nil
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}
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internal var timePassed: TimeInterval = 0.0
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internal var duration: TimeInterval = 0.0
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internal var displayLink: CADisplayLink?
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internal var isReversed: Bool = false
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@objc func displayUpdate(_ link: CADisplayLink) {
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timePassed += isReversed ? -link.duration : link.duration
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if isReversed, timePassed <= 1.0 / 120 {
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delegate?.complete(finished: false)
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stop()
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return
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}
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if !isReversed, timePassed > duration - 1.0 / 120 {
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delegate?.complete(finished: true)
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stop()
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return
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}
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delegate?.updateProgress(progress: timePassed / duration)
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}
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func start(timePassed: TimeInterval, totalTime: TimeInterval, reverse: Bool) {
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stop()
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self.timePassed = timePassed
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self.isReversed = reverse
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self.duration = totalTime
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displayLink = CADisplayLink(target: self, selector: #selector(displayUpdate(_:)))
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displayLink!.add(to: .main, forMode: RunLoop.Mode.common)
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}
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func stop() {
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displayLink?.isPaused = true
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displayLink?.remove(from: RunLoop.main, forMode: RunLoop.Mode.common)
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displayLink = nil
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}
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}
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