How to convert a Persian date into a Gregorian in swift

Question

I want to convert data between \"Persian date and Gregorian\" in swift. I was looking into algorithm to help me convert between them, but I did not really understand how to

Answer 1

Update for Swift 3:

let formatter = DateFormatter()
formatter.dateFormat = "dd/MM/yyyy"
formatter.calendar = Calendar(identifier: .gregorian)
let date = Date()
let dateInGrogrian = formatter.string(from: date)

print(dateInGrogrian)

formatter.calendar = Calendar(identifier: .persian)
formatter.dateFormat = "dd/MM/yyyy"
print("Converted date to Hijri = \(formatter.string(from: date))")