iOS Swift - Get the Current Local Time and Date Timestamp

Question

I\'m trying to make an attendance app and I am really confused about date and time in iOS and Firebase.

I use date as Key, this is the structure of my Firebase datab

Answer 1

For saving Current time to firebase database I use Unic Epoch Conversation:

let timestamp = NSDate().timeIntervalSince1970

and For Decoding Unix Epoch time to Date().

let myTimeInterval = TimeInterval(timestamp)
let time = NSDate(timeIntervalSince1970: TimeInterval(myTimeInterval))