Question

我需要每分钟运行的功能。所以我决定使用NSTimer.scheduledTimerWithTimeInterval函数

这是我的代码

override func viewWillAppear(animated: Bool) {
        refreshDealData()
        NSTimer.scheduledTimerWithTimeInterval(60.0, target: self, selector: Selector("runCountDownFunction:"), userInfo: nil, repeats: true)
    }

func runCountDownFunction()
    {
        NSLog("hello World")
        self.countDownTime = self.now.timeIntervalSinceDate(self.dealDateAndTime)
        self.duration = Int(self.countDownTime)
        self.duration = abs(self.duration)

        var countDownHours = self.duration / 3600
        var countDownMinutes = (self.duration % 3600) / 60
        var countDownSeconds = (self.duration % 3600) % 60
        var countDownDays = countDownHours / 24
        var countDownHoursDisplay = countDownHours % 24
        self.mCountDown.text = "\(countDownDays)D \(countDownHoursDisplay)H \(countDownMinutes)M"

    }

但是我在viewWillAppear

1分钟后收到此错误

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[RockStarTable.DealInsideViewController runCountDownFunction:]: unrecognized selector sent to instance 0x7f91ed8c8000'

有谁知道如何解决这个问题？谢谢！

Answer 1

您的选择器是"runCountDownFunction:"。结肠很有意义;这意味着此方法采用一个参数。所以你必须 make 你的方法采用一个参数。像这样声明你的方法：

func runCountDownFunction(timer:NSTimer) {

现在它的签名与您在创建计时器时给出的选择器匹配。

无法识别的选择器使用NSTimer.scheduledTimerWithTimeInterval函数发送到实例

1 个答案: