How to Convert date into local time zone ios swift

I hope this will work for your problem

func serverToLocal(date:String) -> Date {
 let dateFormatter = DateFormatter()
 dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss"
 dateFormatter.timeZone = TimeZone(abbreviation: "UTC")
 let date = dateFormatter.date(from: date)
 dateFormatter.timeZone = TimeZone.current
 let timeStamp = dateFormatter.string(from: date!)

 return date
}

If you want the result to be a Date object just use the first part of @Intellij-Shivam's answer:

func serverToLocal(date:String) -> Date? {
    let dateFormatter = DateFormatter()
    dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ssZ"
    dateFormatter.timeZone = TimeZone(abbreviation: "UTC")
    let localDate = dateFormatter.date(from: date)

    return localDate
}

(note that DateFormatter.date(from:) returns an optional, which is correct because the input date string might not be in the correct format.)

There is no such thing as a Date in your local time zone. Dates don't have a time zone. They record an instant in time all over the planet.

To display a date in your local time zone you can use the DateFormatter class method localizedString():

let dateString = DateFormatter.localizedString(
  inputDate, 
  dateStyle: .medium, 
  timeStyle: .medium)