每次我点击按钮它只会增加 50 个增量，

Question

当我在模拟器上单击按钮时，它一直在添加 50。我认为它可能没有保存 "latestTerminationDate"，或者可能没有提取它。感谢您的帮助

@IBOutlet weak var coalRunButton: UIButton!
var coalMayham = 1


@IBAction func coalRunButton(_ sender: Any) {
   if let buttonPress = UserDefaults.standard.object(forKey:  "buttonPress") as? Date,
       let terminationDate = UserDefaults.standard.object(forKey: "latestTerminationDate") as? Date {
       var terminationDuration = buttonPress.timeIntervalSince(terminationDate)
       if terminationDuration >= 86400 {  
           _ = 86400
           do { UserDefaults.standard.set(Date(), forKey: "latestTerminationDate")
                UserDefaults.standard.synchronize()
                let dailyCoalAccumulate  = ((Int(terminationDuration)) * coalMayham) + Int(coalPile.text!)!
                coalPile.text = String(dailyCoalAccumulate)
                UserDefaults.standard.set(Data(), forKey:"totalCoal")
           }
       } else  {
         terminationDuration =  50

         UserDefaults.standard.set(Date(), forKey: "latestTerminationDate")
         UserDefaults.standard.synchronize()

         let dailyCoalAccumulate  = ((Int(terminationDuration)) * coalMayham) + Int(coalPile.text!)!
         coalPile.text = String(dailyCoalAccumulate)
         UserDefaults.standard.set(Data(), forKey:"totalCoal")

       }
   } else {
      let terminationDuration = 40

      UserDefaults.standard.set(Date(), forKey: "latestTerminationDate")
      UserDefaults.standard.synchronize()

      let dailyCoalAccumulate  = ((Int(terminationDuration)) * coalMayham) + Int(coalPile.text!)!
      coalPile.text = String(dailyCoalAccumulate)
      UserDefaults.standard.set(Data(), forKey:"totalCoal")
   }
}

Answer 1

这行代码：

let terminationDate = UserDefaults.standard.object(forKey: "latestTerminationDate") as? Date

并没有像您认为的那样返回。因为在这行代码中：

UserDefaults.standard.set(Date(), forKey: "latestTerminationDate")

您输入的 Date() 看起来像：“2018-10-04 15:30:22 +0000” 无法与 86400

相比

出于这个原因：

if terminationDuration >= 86400

失败并恢复为：

 else  {
        terminationDuration =  50

编辑

修复示例：

func getMillisecondsNow() -> Int64{
    let currentDate = Date()
    return getMillisecondsFromDate(date: currentDate)
}


func getMillisecondsFromDate(date: Date) -> Int64{
    var d : Int64 = 0
    let interval = date.timeIntervalSince1970
    d = Int64(interval * 1000)

    return d
}

func getTimeDifferenceFromNowInMilliseconds(time: Int64) -> Int64{
    let now = getMillisecondsNow()
    let diff: Int64 = now - time
    return diff
}

这将以毫秒为单位，因此您需要使用 86400000（24 小时内的毫秒数）而不是 86400（24 小时内的秒数）

现在在您的代码中只需使用它来节省以毫秒为单位的终止时间：

let now = getMillisecondsNow()
UserDefaults.standard.set(now, forKey: "latestTerminationDate")

此代码用于检索并获取以毫秒为单位的时差：

let terminationTime = UserDefaults.standard.object(forKey: "latestTerminationDate") as? Int64
let timeDiff = getTimeDifferenceFromNowInMilliseconds(time: terminationTime)

if timeDiff >= 86400000 {
}
else {
}

每次我点击按钮它只会增加 50 个增量，

Every time I click the button it only adds 50 increments,

swift

if-statement

nsuserdefaults