如何在第一次通過定時器完成後在下面的函數中調用函數

Question

這是我的簡單流程。我仍然需要調用決策者（）時，＃2運行完畢後完成做的時間，並採取全局變量的測量決策者（）的情況測試

TestButtonTAPPED（），並調用：

1. recordTimer（）

2. gatherInput（）

3. 選擇器：levelTimerCallback（）

4. 決策者（）

   // 1. 
   func recordTimer() { 
       /* After 10 seconds, let's stop the recording process */ 
       let delayInSeconds = 10.0 
       let delayInNanoSeconds = DispatchTime.now() + Double(Int64(delayInSeconds * Double(NSEC_PER_SEC)))/Double(NSEC_PER_SEC) 
   
       DispatchQueue.main.after(when: delayInNanoSeconds, execute: { 
        self.soundRecorder!.stop() 
        self.handBtn.isHidden = false 
       }) 
   
   } 
   
   // 2. 
   func gatherInput() { 
       levelTimer = Timer.scheduledTimer(timeInterval: 0.9, target: self, selector: #selector(DBListener.levelTimerCallback), userInfo:nil, repeats: true) 
   } 
   
   //3. 
   func levelTimerCallback() { 
       if soundRecorder.averagePower(forChannel: 0) > -30 
       { 
        // Do gathering for vaiables 
       } 
   } 
   
   
   // 4. 
   func decisionMaker() { 
       // case statments here for final measurement 
   } 
   
   
   
   @IBAction func handTapped(_ sender: UIButton) { 
   
       clearGlobalVariablesOnTap() 
       listner() 
       soundRecorder.record() 
       recordTimer() 
       dbListener.gatherInput() 
   
   } 
   

Answer 1

@IBAction func handTapped(_ sender: UIButton) { 
    clearGlobalVariablesOnTap() 
    listner() 
    soundRecorder.record() 
    recordTimer() 
} 

func recordTimer() { 

    //As soon as this method is called this portion will get executed 
    dbListener.gatherInput() 

    /* After 10 seconds, let's stop the recording process */ 
    let delay = 10.0 
    let delayInSeconds = DispatchTime.now() + DispatchTimeInterval.seconds(delay) 


    //After 10 seconds this block will execute 
    DispatchQueue.main.after(when: delayInSeconds, execute: { 
     self.soundRecorder!.stop() 
     self.handBtn.isHidden = false 
     self.levelTimer.invalidate = true 
     self.decisionMaker() 
    }) 

} 

func gatherInput() { 
    levelTimer = Timer.scheduledTimer(timeInterval: 0.9, target: self, selector: #selector(DBListener.levelTimerCallback), userInfo:nil, repeats: true) 
} 

func levelTimerCallback() { 
    if soundRecorder.averagePower(forChannel: 0) > -30 
    { 
     // Do gathering for vaiables 
    } 
} 


func decisionMaker() { 
    // case statments here for final measurement 
}