ios - 错误-线程1:信号SIGABRT(无法识别的选择器发送到实例)

This question already has answers here:

Unrecognized selector sent to instance NSTimer Swift

(3个答案)


5年前关闭。




我正在制作一个应用，您需要在其中指示标签显示的时间，并且该时间应在页面底部进行递减计数。

当我在Xcode模拟器上运行我的应用程序时，当我希望它仅显示指示的数字时，chronometre标签显示“可选(*指示的数字)”。一秒钟显示后，我进入我的App Delegate并显示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 subtractTime:]: unrecognized selector sent to instance 0x7fbab24299c02015-02-22 21:05:50.862 MemoPres.New[71008:12980314] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[MemoPres_New.ViewController subtractTime:]: unrecognized selector sent to instance 0x7fbab24299c0'。

帮助将不胜感激。

以下是我的所有代码:

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)"

    }


        }
}

最佳答案

您需要在IBAction外部声明方法减去时间()。这同样适用于您的计时器和第二个变量。

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!

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

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

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

    @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)
    }

    @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
    }
}

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

关于ios - 错误-线程1:信号SIGABRT(无法识别的选择器发送到实例)，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/28666040/