Ios Swift中for循环中的计时器_Ios_Swift_Nstimer

Ios Swift中for循环中的计时器

ios swift

Ios Swift中for循环中的计时器,ios,swift,nstimer,Ios,Swift,Nstimer,我只想在一个循环中为给定数量的循环运行计时器。还有一个外环用户将输入他想要的重复次数，每次重复的次数，两次重复之间的时间间隔应用程序将显示每次重复的次数。当所有重复完成后，应用程序将停止计时器但我发现这很难。它看起来好像计时器忽略了for循环，而它本身就是一个循环，当我们只发出timer.invalidate（）时它就会停止有什么想法吗 for x in 0...HowManyRepetitions { counter = 0

我只想在一个循环中为给定数量的循环运行计时器。还有一个外环

用户将输入他想要的重复次数，每次重复的次数，两次重复之间的时间间隔

应用程序将显示每次重复的次数。当所有重复完成后，应用程序将停止计时器

但我发现这很难。它看起来好像计时器忽略了for循环，而它本身就是一个循环，当我们只发出timer.invalidate（）时它就会停止

有什么想法吗

for x in 0...HowManyRepetitions {

                counter = 0
                CountLabel.text = "\(counter)"
                RepetitionLabel.text = "\(x) / \(HowManyRepetitions)"

                for y in 0...HowManyCounts {

                    timer = NSTimer.scheduledTimerWithTimeInterval(PeriodBetween, target: self, selector: updateCounter, userInfo: nil, repeats: true)

                }

            }

我想你的计时器应该出环了

例如：

for x in 0...HowManyRepetitions {

                counter = 0
                CountLabel.text = "\(counter)"
                RepetitionLabel.text = "\(x) / \(HowManyRepetitions)"

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

                for y in 0...HowManyCounts {
                   // doSomething
                    ...
                }

                timer.invalidate()

            }

我想你的计时器应该出环了

例如：

for x in 0...HowManyRepetitions {

                counter = 0
                CountLabel.text = "\(counter)"
                RepetitionLabel.text = "\(x) / \(HowManyRepetitions)"

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

                for y in 0...HowManyCounts {
                   // doSomething
                    ...
                }

                timer.invalidate()

            }

如果你不知道自己在问什么，你就可以进入循环。更多的细节肯定会有所帮助

let param = 0 //IN SCOPE

for y in 0...HowManyCounts {

     param++

     if param != HowManyCounts{ 
     timer = NSTimer.scheduledTimerWithTimeInterval(PeriodBetween, target: self, selector: nil, userInfo: nil, repeats: true)
     }else{
         timer.invalidate()
     }

}

如果你不知道自己在问什么，你就可以进入循环。更多的细节肯定会有所帮助

let param = 0 //IN SCOPE

for y in 0...HowManyCounts {

     param++

     if param != HowManyCounts{ 
     timer = NSTimer.scheduledTimerWithTimeInterval(PeriodBetween, target: self, selector: nil, userInfo: nil, repeats: true)
     }else{
         timer.invalidate()
     }

}

重复计数需要在计时器处理程序中进行管理

您通常将计时器作为实例属性。（例如，当

视图将消失（:）

时，您可能需要使计时器无效）

因此，你可能需要在课堂上写一些类似的东西：

var timer: NSTimer?
func startTimer(howManyCounts: Int, periodBetween: NSTimeInterval) {
    let userInfo: NSMutableDictionary = [
        "counter": 0,
        "howManyCounts": howManyCounts,
        "myName": "Timer"
    ]
    self.timer = NSTimer.scheduledTimerWithTimeInterval(periodBetween, target: self, selector: #selector(timerHandler), userInfo: userInfo, repeats: true)
}

@objc func timerHandler(timer: NSTimer) {
    guard let info = timer.userInfo as? NSMutableDictionary else {
        return
    }
    var counter = info["counter"] as? Int ?? 0
    let howManyCounts = info["howManyCounts"] as? Int ?? 0
    let myName = info["myName"] as? String ?? "Timer"
    counter += 1

    print("\(myName):\(counter)") //countLabel.text = "\(counter)"

    if counter >= howManyCounts {
        timer.invalidate()
    } else {
        info["counter"] = counter
    }
}

从同一类的方法中的某个位置启动计时器，如下所示：

    startTimer(10, periodBetween: 3.0)

我不明白为什么你们需要外环，但若你们想让多个定时器工作，你们需要保持所有定时器

var timers: [NSTimer] = []
func startTimers(howManyRepetitions: Int, howManyCounts: Int, periodBetween: NSTimeInterval) {
    timers = []
    for x in 1...howManyRepetitions {
        let userInfo: NSMutableDictionary = [
            "counter": 0,
            "howManyCounts": howManyCounts,
            "myName": "Timer-\(x)"
        ]
        timers.append(NSTimer.scheduledTimerWithTimeInterval(periodBetween, target: self, selector: #selector(timerHandler), userInfo: userInfo, repeats: true))
    }
}

启动计时器，如下所示：

    startTimers(3, howManyCounts: 4, periodBetween: 1.0)