我已将我所做的应用与Firebase数据库相关联。
当按下按钮时,应用会将Firebase的时间作为timeIntervalSinceReferenceDate
发送。值的一个示例是 - 498898978852.928 。
我希望这个号码能够区分用户在48小时前按下相同的按钮。
有没有办法测量48小时的时间段,还是应该使用不同的方法?
我正在使用swift 2和Xcode 7!
答案 0 :(得分:3)
Swift 3.如果您使用的是Swift 2,请使用NSDate
//the first button press, this is a double but assume it's a timeInterval
let firstPress = 498898978.928
let date = Date()
let secondPress = date.timeIntervalSinceReferenceDate //the second button press
let diffInSeconds = secondPress - firstPress //total time difference in seconds
let hours = diffInSeconds/60/60 //hours=diff in seconds / 60 sec per min / 60 min per hour
if hours < 48 {
print("less then 48 hours difference")
} else {
print("greater/equal to 48 hours difference")
}
答案 1 :(得分:1)
您正在使用 unix timeStamp * 1000 ,当将其转换为Int时用作时间戳,但由于您将使用它进行时间操作。用它来存储你的时间戳: -
let timeStamp = NSDate.timeIntervalSinceReferenceDate // Like this only
在课程范围之外扩展 NSDate
extension NSDate {
func daysFromTheDate(date: NSDate) -> Int {
return NSCalendar.currentCalendar().components(.Day, fromDate: date, toDate: self, options: []).day
}
}
class yourViewController : UIViewController,.. {
...
}
声明: -
let date1 = NSDate() // Declare the variable globally
然后在 .observe 事件中,firebase函数使用: -
var retrieved_timeStamp = ... // timeStamp that you retrieve from firebase
var date = NSDate(timeIntervalSinceReferenceDate: timeInterval(retrieved_timeStamp))
print(date1.daysFromTheDate(from: date as NSDate))
检查条件
if date1.daysFromTheDate(from: date as NSDate) >= 2{
//48 or more hours have passed now, Do the Job. Bingo!..
}
进一步查看日期: - Difference between two NSDates