日期没有获得电话的当前时间Swift 4

Question

我具有此功能，可以计算手机当前分钟的时间。在此特定时间之后，我试图让一个计时器熄灭。该功能的调用方式是通过用户在应用中翻转的开关，并将时间重置为自我。好吧，我遇到了我的NSDATE对象，当开关之前翻转时会获得旧值。有没有办法将NSDATE对象重置为零？

这是我计算手机当前时间的代码。

func GetInitialTime(){
    finalTime = 0
    firstTimeCounter = 0
    timeInSeconds = 0
    let calendar = NSCalendar.current
    var minutes = calendar.component(.minute, from: date)
    var timeDifference = Int()
    if(minutes == 00 || minutes == 30) {
        print("The minute hand is at zero or thirty.")
    }
    else {
        print("The minute hand is NOT ar zero or thirty")
        print("The minute hand ia at:")
        if minutes < 30 {
            while (!(minutes == 30)) {
                minutes += 1
                timeDifference += 1
            }
            print("Therefore we make the minute hand at zero or thiry: ", minutes)
            print("The time difference we add to the minute is: ", timeDifference)
        }
        else {
            var i = minutes
            while i < 60 {
                i += 1
                minutes += 1
                timeDifference += 1
            }
            print("Therefore we make the minute hand at zero or thirty: ", minutes)
            print("The Time difference we add to the minute is: ", timeDifference)
        }
    }
    finalTime = Double(timeDifference * 60)
    print("The time difference in seconds is:", finalTime)
}

，我在此处声明date((对象

let center = UNUserNotificationCenter.current()
let button = UIButton(type: UIButtonType.custom)
let date = Date()
var timeInSeconds = Int()
var finalTime = Double()
var halfHour = Double(1800)
var firstTimeCounter = Int()
var firstTimer = Timer()
var repeatingTimer = Timer()
var backgroundTask = BackgroundTask()
let dispatchGroup = DispatchGroup()
var urlWeb = "http://morrowrenewablesflowdata.com/iOSConnections/Notifications.php"
var downtimes = [String]()
var flows = [String]()

Answer 1

您的代码使用的是一个让常数的实例变量date。您不会显示设置的上下文，但是我假设它是类的实例变量。这是一个让人常数的事实，意味着它永远不会改变其声明的范围。这几乎可以肯定是您的问题。