hora de cuerda rápida para una época
let date = NSDate() // current date
let unixtime = date.timeIntervalSince1970
Horned Rattlesnake
let date = NSDate() // current date
let unixtime = date.timeIntervalSince1970
let epochTime = TimeInterval(1429162809359) / 1000
let date = Date(timeIntervalSince1970: epochTime) // "Apr 16, 2015, 2:40 AM"
print("Converted Time \(date)") // "Converted Time 2015-04-16 05:40:09 +0000\n"var epocTime = NSTimeInterval(1429162809359)
let myDate = NSDate(timeIntervalSince1970: epocTime)
println("Converted Time \(myDate)")