swift - 添加定时器

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mport 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")     } } /// GCD定时器相关方法 extension ZDTimerTool{     /// 初始化得到GCD定时器     func DispatchTimer(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()                 }             }             self.GCDTimer?.resume()             self.GCDTimer?.schedule(deadline: DispatchTime.now(), repeating: timeInterval)         }else{             self.stopOrResumeGCDTimer(isStop: false)         }                                   }     /// 暂停或者重启GCDTimer     func stopOrResumeGCDTimer(isStop: Bool){         guard self.isSuspend != isStop else {             return         }         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     } }

　　

2.使用

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1 2	//倒计时 var countdownTimer = ZDTimerTool()

　　

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适当地方开启定时器        countdownTimer.DispatchTimer(timeInterval: 1) { [weak self] in             self?.handTimer()         }

　　

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func handTimer() {     if self.remainingSeconds == 0{         self.remainingSeconds = 60         self.sendButton.setTitle("重新发送", for: .normal)         self.sendButton.backgroundColor = UIColor.init(hexColor: "FF8E00")         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     }     self.remainingSeconds -= 1 }