//
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// CLGCDTimer.swift
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// CLPlayer
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//
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// Created by Chen JmoVxia on 2021/10/27.
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//
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import UIKit
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class CLGCDTimer: NSObject {
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public enum TimerState {
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case suspended
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case resumed
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}
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/// 执行时间
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public private(set) var interval: TimeInterval!
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/// 第一次执行延迟时间延迟时间
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public private(set) var initialDelay: TimeInterval!
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/// 队列
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public private(set) var queue: DispatchQueue!
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/// 定时器
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public private(set) var timer: DispatchSourceTimer!
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/// 运行状态
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public private(set) var state: TimerState = .suspended
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/// 执行次数
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public private(set) var numberOfActions = Int.zero
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/// 响应回调
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public private(set) var eventHandler: ((Int) -> Void)?
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/// 创建定时器
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///
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/// - Parameters:
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/// - interval: 间隔时间
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/// - delaySecs: 第一次执行延迟时间，默认为0
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/// - queue: 定时器调用的队列，默认主队列
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/// - repeats: 是否重复执行，默认true
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/// - action: 响应
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public init(interval: TimeInterval,
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initialDelay: TimeInterval = 0,
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queue: DispatchQueue = .main)
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{
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super.init()
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self.interval = interval
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self.initialDelay = initialDelay
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self.queue = queue
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timer = DispatchSource.makeTimerSource(queue: queue)
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timer.schedule(deadline: .now() + initialDelay, repeating: interval)
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timer.setEventHandler { [weak self] in
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guard let self = self else { return }
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self.numberOfActions += 1
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self.eventHandler?(self.numberOfActions)
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}
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}
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deinit {
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timer?.setEventHandler(handler: nil)
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timer?.cancel()
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eventHandler = nil
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resume()
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}
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}
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extension CLGCDTimer {
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/// 开始
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public func run(_ handler: @escaping ((_ numberOfActions: Int) -> Void)) {
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eventHandler = handler
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resume()
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}
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/// 暂停
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public func pause() {
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guard let timer = timer else { return }
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guard state != .suspended else { return }
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state = .suspended
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timer.suspend()
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}
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/// 恢复定时器
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public func resume() {
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guard state != .resumed else { return }
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guard let timer = timer else { return }
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state = .resumed
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timer.resume()
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}
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}
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