如何将多个进度视图添加到一个计时器，以便它们都有不同的时间，并且当一个关闭时下一个开始？

Question

//here is all of the code that I am using for this project
import UIKit
import AVFoundation

class ViewController: UIViewController {

    override func viewDidLoad() {
       super.viewDidLoad()
        // Do any additional setup after loading the view.
    

    
    }

    @IBAction func btnPressed4(_ sender: Any) {
        
            let currentDateTime = Date()
           let formatter = DateFormatter()
           formatter.timeStyle = .short
          let dateTimeString = formatter.string(from: currentDateTime)
        timePrint4.text = dateTimeString
        btnPressed4.titleLabel?.textColor = UIColor.white
    }
    
    
    
    @IBAction func btnPressed3(_ sender: Any) {
        
            let currentDateTime = Date()
           let formatter = DateFormatter()
           formatter.timeStyle = .short
          let dateTimeString = formatter.string(from: currentDateTime)
        timePrint3.text = dateTimeString
        btnPressed3.titleLabel?.textColor = UIColor.white
    }
    
    
    
    
    @IBAction func btnPressed2(_ sender: UIButton) {
    
        let currentDateTime = Date()
       let formatter = DateFormatter()
       formatter.timeStyle = .short
      let dateTimeString = formatter.string(from: currentDateTime)
        timePrint2.text = dateTimeString
        btnPressed2.titleLabel?.textColor = UIColor.green
    }
    
    
    
    
    
    
    
    @IBAction func btnPressed1(_ sender: UIButton) {
         let currentDateTime = Date()
        let formatter = DateFormatter()
        formatter.timeStyle = .short
       let dateTimeString = formatter.string(from: currentDateTime)
    timePrint1.text = dateTimeString
        
    }
    

 

    @IBOutlet weak var btnPressed1: UIButton!
    @IBOutlet weak var btnPressed2: UIButton!
    @IBOutlet weak var btnPressed3: UIButton!
    @IBOutlet weak var btnPressed4: UIButton!
    
    
    @IBOutlet weak var timePrint1: UILabel!
    @IBOutlet weak var timePrint2: UILabel!
    @IBOutlet weak var timePrint4: UILabel!
    
    @IBOutlet weak var timePrint3: UILabel!
    
    
  
    

    @IBOutlet weak var titleLabel: UILabel!
    
    @IBOutlet weak var progressBar1: UIProgressView!
    
    @IBOutlet weak var progressBar2: UIProgressView!
    
    @IBOutlet weak var progressBar3: UIProgressView!
    
    @IBOutlet weak var progressBar4: UIProgressView!
    
    
     let start = 5
    var timer = Timer()
    var player: AVAudioPlayer!
    var totalTime = 0
    var secondsPassed = 0
    
    @IBAction func startButtonPressed(_ sender: UIButton) {
    
   
        let startB = sender.titleLabel?.text
        totalTime = start
           
        
        
        progressBar1.progress = 0.0
        secondsPassed = 0
        titleLabel.text = "coffee timer"
        btnPressed1.titleLabel?.textColor = UIColor.white
        timer = Timer.scheduledTimer(timeInterval: 1.0, target:self, selector: #selector(updateTimer), userInfo:nil, repeats: true)
    }
    
    @objc func updateTimer() {
        if secondsPassed < totalTime {
            secondsPassed += 1
            progressBar1.progress = Float(secondsPassed) / Float(totalTime)
            print(Float(secondsPassed) / Float(totalTime))
        } else {
            timer.invalidate()
            titleLabel.text = "check coffee"
            btnPressed1.titleLabel?.textColor = UIColor.green
           
            let url = Bundle.main.url(forResource: "alarm_sound", withExtension: "mp3")
            player = try! AVAudioPlayer(contentsOf: url!)
            player.play()
            
        
         
        
        }
               
    
    }
}
//I have four progress views and when the first ends a alarm goes off and then the next starts eminently and the goes to the next and then to the fourth one were the timer ends after that

Answer 1

有很多不同的方法来处理这个问题。以下是一种可能的方法的概要：

有一个currentProgress 类型的实例变量Int? 如果它为nil，则您的进度指示器都没有运行。

有一个实例变量stepCompletedInterval: Double

创建一个结构来保存用于管理进度步骤的不同视图：

struct ProgressInfo {
   let aButton: UIButton
   let aLabel: UILabel
   let aProgressIndicator: UIProgressIndicator
   let secondsForThisStep: Int
}

创建一个ProgressInfo 数组（我们称之为progressInfoArray）并使用上面的按钮、标签和进度指示器填充它。还为每个条目指定 secondsForThisStep 的值。

当用户启动进程时，将 currentProgress 设置为 0（第一个进度指示器。）

现在，对于每个步骤，将 stepCompletedInterval 设置为当前时间加上 progressInfoArray[currentProgress].secondsForThisStep（当前步骤应完成的时间。

同时启动一个 1 秒的重复计时器。每次定时器触发时，检查当前时间是否大于 stepCompletedInterval。如果是，如果还有更多步骤要完成，则增加 currentProgress，并重复上面的“每个步骤的现在”部分。

这是你如何去做的一个粗略的概述。我不完全清楚你的开始按钮和btnPressed1 到btnPressed4 应该做什么，所以我把它留给你。

您需要根据您的需要调整我概述的方法。这不是代码，而是一种方法。我不会给你代码。