错误 - 线程 1:信号 SIGABRT(无法识别的选择器发送到实例) [英] Error - Thread 1: signal SIGABRT (unrecognized selector sent to instance)

问题描述

我正在开发一个应用，您需要在其中指明标签出现的时间量，并且该时间量会在页面底部倒计时.

I'm making an app where you need to indicate the amount of time that a label appears for and that amount of time is counted down at the bottom of the page.

当我在 Xcode 模拟器上运行我的应用程序时，当我希望 chronometre 标签仅显示指定的数字时，它会显示可选(*指示的数字)".显示一秒钟后，我会转到我的 App Delegate，它会显示 Thread 1: signal SIGABRT.

When I run my app on the Xcode simulator, the chronometre label displays "Optional (*indicated number)" when I want it to only display the indicated number. Once it's displayed for a second, I get taken to my App Delegate and it says Thread 1: signal SIGABRT.

还显示以下错误:2015-02-22 21:05:50.860 MemoPres.New[71008:12980314] -[MemoPres_New.ViewController减去Time:]: unrecognized selector sent to instance 0x7fbab24299c02015-02-22 21:05:50.862 MemoPres.New[71008:12980314] *** 由于未捕获的异常NSInvalidArgumentException"而终止应用程序，原因:-[MemoPres_New.ViewController减法时间:]:无法识别的选择器发送到实例".

不胜感激.

以下是我的全部代码:

class ViewController: UIViewController {


@IBOutlet weak var chronometre: UILabel!
@IBOutlet weak var prochainpointLabel: UILabel!
@IBOutlet weak var pointactuelLabel: UILabel!
@IBOutlet weak var point1Textfield: UITextField!
@IBOutlet weak var point1tempsTextfield: UITextField!
@IBOutlet weak var point2Textfield: UITextField!
@IBOutlet weak var point2tempsTextfield: UITextField!


override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

@IBAction func presenterButton(sender: AnyObject) {

    var timer = NSTimer()
    var seconds = point1tempsTextfield.text.toInt()

    pointactuelLabel.text = point1Textfield.text
    prochainpointLabel.text = point2Textfield.text
    chronometre.text = "\(seconds)"



        timer = NSTimer.scheduledTimerWithTimeInterval(1.0, target: self, selector: ("subtractTime:"), userInfo: nil, repeats: true)



    func subtractTime(dt:NSTimer){
        seconds!--
        chronometre.text = "\(seconds)"

    }


        }
}

推荐答案

你需要在你的 IBAction 之外声明你的方法subtractTime().这同样适用于您的计时器和第二个变量.

You need to declare your method subtractTime() outside your IBAction. The same applies to your timer and second vars.

import UIKit

class ViewController: UIViewController {

    @IBOutlet weak var progressView: UIProgressView!
    @IBOutlet weak var strTimer: UILabel!
    @IBOutlet weak var btnStartCancel: UIButton!
    @IBOutlet weak var btnPauseResume: UIButton!

<小时>

    var timer = Timer()
    var startTime: TimeInterval = 0
    var timeLeft: TimeInterval = 45
    var isTimerON = false
    var isPaused = false

<小时>

    func updateTimer() {
        if isTimerON && !isPaused {
            strTimer.text = (startTime - Date().timeIntervalSinceReferenceDate).time
            progressView.progress = (1 - Float(startTime - Date().timeIntervalSinceReferenceDate) / 45)
        }
    }

<小时>

    override func viewDidLoad() {
        super.viewDidLoad()
        timer = .scheduledTimerWithTimeInterval(1/20, target: self, selector: "updateTimer", userInfo: nil, repeats: true)
        RunLoop.main.addTimer(timer, forMode: .common)
    }

<小时>

    @IBAction func pauseResumeAction(_ sender: Any) {
        isPaused = !isPaused
        if isPaused {
            timeLeft = startTime - Date().timeIntervalSinceReferenceDate
        }
        startTime = Date().dateByAddingTimeInterval(timeLeft).timeIntervalSinceReferenceDate
        btnPauseResume.setTitle( !isPaused ? "Pause" : "Resume", forState: .normal)
    }

<小时>

    @IBAction func startCancelAction(_ sender: Any) {
        isTimerON = !isTimerON
        isPaused = false
        timeLeft = 45

        startTime = isTimerON ? Date().dateByAddingTimeInterval(timeLeft).timeIntervalSinceReferenceDate : timeLeft
        btnStartCancel.setTitle(!isTimerON ? "Start" : "Cancel",  forState: .normal)
        progressView.progress = 0
        btnPauseResume.setTitle("Pause",  forState: .normal)
        strTimer.text = "00:45"
        btnPauseResume.enabled = isTimerON
    }
}

<小时>

extension TimeInterval {
    var time: String {
        String(format: "%02d:%02d", Int((self/60)%60), Int(self%60))
    }
}

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