CODEWITHSUNDEEP
javascriptswiftgoogle-cloud-firestore
H.Epstein
H.Epstein

Reputation: 731

Convert String that was saved from JS to Date in Swift

I'm saving to my Firestore database a time stamp from my node js server, For some reason it save the Date() as string in the database.

I'm trying to load the documents in my IOS app but I could not find a way to convert the string saved by JS to swift all of the solutions I've tried produces the app to crash because of nil value after the convertion.

This is my code

func convertStringToDate(date:String) -> Date{
   let dateFormatter = DateFormatter()
   dateFormatter.dateFormat = "yyyy'-'MM'-'dd'T'HH':'mm'"
   let returnValue =  dateFormatter.date(from: date)
   return returnValue!
}

date Value that I receive from Firestore is :
date String "Fri Aug 03 2018 22:43:00 GMT+0300 (IDT)"

Upvotes: 1

Views: 515

Answers (2)

Helmer Barcos
Helmer Barcos

Reputation: 2076

You could just save the timestamp serverValue from Firestore. It gives you a TIMESTAMP in unix time, this is a number that you can convert in swift to human Time.

in your Node server

const timestamp = firebase.firestore.FieldValue.serverTimestamp()
ref.update({ updatedAt: timestamp })

in Swift 

let date = Date(timeIntervalSince1970: YOUR_TIMESTAMP_HERE_AS_VAR)

Upvotes: 4

Shahzaib Qureshi
Shahzaib Qureshi

Reputation: 920

You can convert get your date like this :

var dateStr = "Fri Aug 03 2018 22:43:00 GMT+0300 (IDT)"
    guard let ind = dateStr.index(of: "G") else {return}
    dateStr = String(dateStr[..<ind].trimmingCharacters(in: CharacterSet.whitespaces))
    print(convertStringToDate(date: dateStr))

func convertStringToDate(date:String) -> Date{
    let dateFormatter = DateFormatter()
    dateFormatter.dateFormat = "EEE MMM dd yyyy HH:mm:ss"
    let returnValue =  dateFormatter.date(from: date)
    let timeZone = TimeZone.current
    return returnValue!.addingTimeInterval(TimeInterval(timeZone.secondsFromGMT()))
}

Upvotes: 1

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