//
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// Copyright © 2018年 dh. All rights reserved.
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// 动画如果采用CABaseAnimation的方法，无法处理进入后台的问题，统一使用定时器进行绘制
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// 由于使用了定时器，在不使用的时候，需要调用stopTimer()方法进行销毁
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// UILabel富文本在文字较少的时候，行间距设置无效，使用两个Label进行显示
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import UIKit
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@objc public protocol DHCycleTimerViewDelegate: NSObjectProtocol {
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func cycleTimerViewTimeout(cycleView: DHCycleTimerView)
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func cycleTimerView(cycleView: DHCycleTimerView, tick: Int)
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}
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@objc public class DHCycleTimerView: UIView {
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@objc public weak var delegate: DHCycleTimerViewDelegate?
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/// 超时的闭包，外层需要注意循环引用的问题
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@objc public var timeout: (() -> ())?
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/// 线条宽度
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@objc public var progressWidth: CGFloat = 3 {
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didSet {
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bottomLayer.lineWidth = progressWidth
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progressLayer.lineWidth = progressWidth
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}
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}
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/// 进度条底色
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@objc public var progressBackgroundColor: UIColor = UIColor.dhcolor_c0() {
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didSet {
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bottomLayer.strokeColor = progressBackgroundColor.cgColor
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}
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}
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/// 进度条前景颜色
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@objc public var progressForegroundColor: UIColor = UIColor.dhcolor_c8() {
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didSet {
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progressLayer.strokeColor = progressForegroundColor.cgColor
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}
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}
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/// 倒计时总时间
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@objc public var maxTime: Int = 30 {
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didSet {
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updateProgressText()
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drawProgressPath()
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}
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}
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/// 当前计时时间
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public var currentTime: Int = 0
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/// 计时器计数（毫秒）
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private var millisecondsCount: TimeInterval = 0
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private var origin: CGPoint = CGPoint(x: 0, y: 0)
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private var radius: CGFloat = 0
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/// 起始点
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private var startAngle: CGFloat = -CGFloat(Double.pi / 2)
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/// 定时器
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private var timer: DispatchSourceTimer?
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/// 标记是否开始
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private var isStarted: Bool = false
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/// 内容label
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private lazy var contentLabel: UILabel = {
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let label = UILabel()
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label.textColor = progressBackgroundColor
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label.textAlignment = .center
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label.font = UIFont.boldSystemFont(ofSize: 25)
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return label
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}()
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///秒数label
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private lazy var secondLabel: UILabel = {
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let label = UILabel()
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label.textColor = progressBackgroundColor
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label.textAlignment = .center
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label.font = UIFont.boldSystemFont(ofSize: 25)
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label.text = "s"
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return label
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}()
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private lazy var bottomLayer: CAShapeLayer = {
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let layer = CAShapeLayer()
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layer.fillColor = UIColor.clear.cgColor
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layer.lineWidth = progressWidth
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layer.strokeColor = progressBackgroundColor.cgColor
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return layer
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}()
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private lazy var progressLayer: CAShapeLayer = {
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let layer = CAShapeLayer()
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layer.lineCap = kCALineCapRound
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layer.fillColor = UIColor.clear.cgColor
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layer.lineWidth = progressWidth
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layer.strokeColor = progressForegroundColor.cgColor
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return layer
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}()
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// MARK: Init Methods
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override init(frame: CGRect) {
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super.init(frame: frame)
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backgroundColor = UIColor.dhcolor_c43()
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setupLayers()
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}
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required public init?(coder aDecoder: NSCoder) {
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super.init(coder: aDecoder)
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backgroundColor = UIColor.clear
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setupLayers()
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}
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func setupLayers() {
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layer.addSublayer(bottomLayer)
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layer.addSublayer(progressLayer)
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addSubview(secondLabel)
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addSubview(contentLabel)
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secondLabel.snp.makeConstraints { make in
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make.left.width.equalTo(self)
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make.height.equalTo(20)
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make.top.equalTo(self.snp.centerY).offset(5)
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}
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contentLabel.snp.makeConstraints { make in
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make.left.width.equalTo(self)
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make.height.equalTo(20)
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make.bottom.equalTo(secondLabel.snp.top)
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}
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origin = CGPoint(x: self.bounds.size.width / 2, y: self.bounds.size.height / 2)
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radius = self.bounds.size.width / 2
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let bottomPath = UIBezierPath.init(arcCenter: origin, radius: radius, startAngle: startAngle, endAngle: CGFloat(Double.pi * 2), clockwise: true)
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bottomLayer.path = bottomPath.cgPath
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}
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// MARK: Timer Process
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@objc public func startTimer() {
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startTimer(reset: true)
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}
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@objc public func stopTimer() {
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timer?.cancel()
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isStarted = false
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}
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@objc public func pauseTimer() {
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timer?.cancel()
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isStarted = false
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}
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@objc public func resumeTimer() {
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startTimer(reset: false)
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}
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private func startTimer(reset: Bool) {
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if isStarted == true {
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return
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}
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isStarted = true
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//重置或者超时后，重新开启
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if reset || currentTime >= maxTime {
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currentTime = 0
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millisecondsCount = 0
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progressLayer.removeAllAnimations()
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drawProgressPath()
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}
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//设置开始的时间
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updateProgressText()
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//屏幕刷新50HZ为参考
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let interval = TimeInterval(1 / 50.0) * 1_000
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timer = DispatchSource.makeTimerSource(flags: [], queue: DispatchQueue.main)
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timer!.schedule(deadline: DispatchTime.now(), repeating: .milliseconds(Int(interval)), leeway: .microseconds(10))
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timer!.setEventHandler {
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//print("🍎🍎🍎 \(NSStringFromClass(self.classForCoder))::\(self.currentTime)-\(self.millisecondsCount)-\(self)")
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if self.isStarted, Int(self.millisecondsCount / 1_000) >= self.maxTime {
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self.timeoutProcess()
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self.delegate?.cycleTimerViewTimeout(cycleView: self)
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return
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}
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self.drawProgressPath()
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self.millisecondsCount += interval
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self.currentTime = Int(self.millisecondsCount / 1_000)
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self.updateProgressText()
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//传出时间（第一次、整数秒回调）
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if self.millisecondsCount <= interval || Int(self.millisecondsCount) % 1_000 == 0 {
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self.delegate?.cycleTimerView(cycleView: self, tick: self.currentTime)
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}
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}
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timer?.resume()
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}
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private func timeoutProcess() {
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timeout?()
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stopTimer()
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}
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// MARK: Draw Path
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private func drawProgressPath() {
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if isStarted == false {
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return
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}
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let endAngle = startAngle + CGFloat(millisecondsCount / 1_000) * CGFloat(Double.pi * 2) / CGFloat(maxTime)
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let topPath = UIBezierPath(arcCenter: origin, radius: radius, startAngle: startAngle, endAngle: endAngle, clockwise: true)
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progressLayer.path = topPath.cgPath
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}
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private func updateProgressText() {
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contentLabel.text = "\(self.maxTime - self.currentTime)"
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}
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private func multilineTextHeight(font: UIFont) -> CGFloat {
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let size = CGSize(width: self.bounds.width, height: self.bounds.height)
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let style = NSMutableParagraphStyle()
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style.lineBreakMode = NSLineBreakMode.byCharWrapping
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style.lineSpacing = 10
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let attributes = [NSAttributedStringKey.font: font,
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NSAttributedStringKey.paragraphStyle: style]
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let text = "Test\nTest" as NSString
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let rect = text.boundingRect(with: size,
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options: NSStringDrawingOptions.usesLineFragmentOrigin,
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attributes: attributes,
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context: nil)
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return rect.size.height
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}
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// MARK: Deinit
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deinit {
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print("🍎🍎🍎 \(NSStringFromClass(self.classForCoder)):: dealloced...")
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}
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}
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