Sigabrt swift Xcode(制作计时器)
我想做一个秒表,但我似乎不明白为什么我的申请表上会有一个sigabrt。对不起,我不知道要包括什么,所以我包括了所有内容Sigabrt swift Xcode(制作计时器),xcode,swift,nstimer,Xcode,Swift,Nstimer,我想做一个秒表,但我似乎不明白为什么我的申请表上会有一个sigabrt。对不起,我不知道要包括什么,所以我包括了所有内容 var timer = NSTimer() var minutes: Int = 0 var seconds: Int = 0 var fractions: Int = 0 var startStopWatch: Bool = true var StopwatchString: String = "" @IBOutlet weak var display: UILabel!
var timer = NSTimer()
var minutes: Int = 0
var seconds: Int = 0
var fractions: Int = 0
var startStopWatch: Bool = true
var StopwatchString: String = ""
@IBOutlet weak var display: UILabel!
@IBAction func start(sender: UIButton) {
if startStopWatch == true {
NSTimer.scheduledTimerWithTimeInterval(0.01, target: self, selector: Selector("updateStopwatch"), userInfo: nil, repeats: true)
startStopWatch = false
} else {
timer.invalidate()
startStopWatch = true
}
}
@IBAction func reset(sender: UIButton) {
}
override func viewDidLoad() {
super.viewDidLoad()
display.text = "00:00.00"
}
func updateStopWatch() {
fractions += 1
if fractions == 100 {
seconds += 1
fractions = 0
}
if seconds == 60 {
minutes += 1
seconds = 0
}
let fractionsString = fractions > 9 ? "\(fractions)" : "0\(fractions)"
let secondsString = seconds > 9 ? "\(seconds)" : "0\(seconds)"
let minutesString = minutes > 9 ? "\(minutes)" : "0\(minutes)"
StopwatchString = "\(minutesString):\(secondsString).\(fractionsString)"
display.text = StopwatchString
}
我将您的代码剪切并粘贴到项目中,当我点击开始按钮时,错误消息的第一行显示: -[My.ViewController updateStopwatch]:发送到实例0x7fe0034b3520的无法识别的选择器 这告诉了你所有你需要知道的。您将
updateStopwatch
消息发送到视图控制器,但它没有实现该方法。不过我注意到您的ViewController确实实现了一个updateStopWatch
方法。在我看来,这是一个基本的大写错误
始终,始终,始终,至少读取错误消息的第一行。以下是一些修复:
+我最初将计时器变量更改为nil-它将保存在start函数中
+start函数中的if语句如下所示:
如果startStopWatch==true但应该是这样的: 如果(启动TopWatch) 希望这有帮助:)
仅供参考,你的秒表设置方式会非常不准确。。。最好是在用户点击开始按钮时保存(在
NSDate
对象中),然后根据当前时间减去用户点击开始的时间更新标签。
var timer = nil
var minutes = 0
var seconds = 0
var fractions = 0
var startStopWatch = true
var StopwatchString = ""
@IBOutlet weak var display: UILabel!
@IBAction func start(sender: UIButton) {
if (startStopWatch == true) {
timer = NSTimer.scheduledTimerWithTimeInterval(0.01, target: self, selector: Selector("updateStopwatch"), userInfo: nil, repeats: true)
startStopWatch = false
//I added one thing. If the start button is pushed the text will change to stop. You can change this if you like.
sender.setTitle("Stop", forState: .Normal)
//
} else {
timer.invalidate()
startStopWatch = true
}
}
@IBAction func reset(sender: UIButton) {
display.text! = "00:00.00"
}
override func viewDidLoad() {
super.viewDidLoad()
display.text! = "00:00.00"
}
func updateStopWatch() {
fractions++
if (fractions == 100) {
seconds++
fractions = 0
}
if (seconds == 60) {
minutes++
seconds = 0
}
var fractionsString = fractions > 9 ? "\(fractions)" : "0\(fractions)"
var secondsString = seconds > 9 ? "\(seconds)" : "0\(seconds)"
var minutesString = minutes > 9 ? "\(minutes)" : "0\(minutes)"
StopwatchString = "\(minutesString):\(secondsString).\(fractionsString)"
display.text! = StopwatchString
}