封装的类代码
import UIKit /// 控制定时器的类
class ZDTimerTool: NSObject {
/// 定时器
// private var timer: Timer?
/// GCD定时器
private var GCDTimer: DispatchSourceTimer?
/// GCD定时器的挂起状态
private var isSuspend: Bool = false
override init() {
super.init()
}
deinit {
// 对象在销毁前会销毁定时器，所以使用定时器应该设置全局的属性
// self.invaliTimer()
self.invaliGCDTimer()
DDLOG(message: "deinit: ZDTimerTool")
}
// /// 设置定时器
// func initilAndStartTimer(timeInterval: TimeInterval,handleBlock:@escaping (() -> Void)) {
// self.timer = Timer.scheduledTimer(withTimeInterval: timeInterval, repeats: true, block: { t in
// handleBlock()
// })
// }
// /// 暂停或者重启定时器定时器
// func stopOrStartTimer(isStop: Bool) {
// self.timer?.fireDate = isStop == true ? Date.distantFuture : Date.distantPast
// }
// /// 销毁定时器
// func invaliTimer() {
// self.timer?.invalidate()
// self.timer = nil
// }
}
/// GCD定时器相关方法
extension ZDTimerTool{
/// 初始化得到GCD定时器
func DispatchTimer(delayTime: Double = , timeInterval: TimeInterval , handleBlock:@escaping (() -> Void)) {
if self.GCDTimer == nil {
self.GCDTimer = DispatchSource.makeTimerSource(flags: [], queue: DispatchQueue.main)
self.GCDTimer?.schedule(deadline: DispatchTime.now(), repeating: timeInterval)
self.GCDTimer?.setEventHandler{
DispatchQueue.main.async {
handleBlock()
}
}
}else{
self.GCDTimer?.setEventHandler{
DispatchQueue.main.async {
handleBlock()
}
}
}
self.GCDTimer?.schedule(deadline: DispatchTime.now(), repeating: timeInterval)
// self.GCDTimer?.schedule(wallDeadline: DispatchWallTime.now(), repeating: timeInterval)
DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + delayTime) { [weak self] in
self?.GCDTimer?.resume()
} }
/// 暂停或者重启GCDTimer
func stopOrResumeGCDTimer(isStop: Bool){
isStop == true ? self.GCDTimer?.suspend() : self.GCDTimer?.resume()
self.isSuspend = isStop
}
/// 销毁GCD定时器
func invaliGCDTimer() {
if self.isSuspend == true {
self.GCDTimer?.resume()
}
self.GCDTimer?.cancel() //销毁前不能为suspend(挂起状态)
self.GCDTimer = nil
}
}
使用方法：
属性 timer 和时间
//倒计时
var countdownTimer = ZDTimerTool() // remainingSeconds代表当前倒计时剩余的秒数
var remainingSeconds: Int = //在需要的地方开启倒计时
countdownTimer.DispatchTimer(timeInterval: ) { [weak self] in
self?.handTimer()
} func handTimer() {
self.remainingSeconds -=
if self.remainingSeconds == {//倒计时0秒
self.remainingSeconds =
self.sendButton.setTitle("重新发送", for: .normal)
self.sendButton.backgroundColor = UIColor.red
self.sendButton.isEnabled = true
self.countdownTimer.stopOrResumeGCDTimer(isStop: true)
}else{
sendButton.setTitle("\(remainingSeconds)秒后重新获取", for: .normal)
self.sendButton.backgroundColor = UIColor.gray
sendButton.isEnabled = false
}
}