How to generate UUID in the swift example

How to generate UUID in the swift example

There are multiple ways to generate UUID in swift with examples.

Unique identifiers are 128-bit values that store unique values.

There are different types of aliases

  • Universally Unique Identifier(UUID)
  • Globally Unique Identifiers(GUID)
  • Interface Identifiers(IID)

These unique identifiers are used to represent the primary key of an object in the database

UUID follows RFC 4122 Version2 always generates a Unique string in lower case.

These are written with base 16, and use 1-9 and a-f characters.

Generate UUID in swift with example

  • using NSUUID class

NSUUID class provides uuidString that returns the unique string in uppercase.

import Foundation
let uuid = NSUUID().uuidString
print(uuid) //09BA1C5D-71CE-4DD8-BBF4-4099FD68705A

NSUUID works in the swift 4 version only.

  • using UUID Structure

uuidString method of UUID returns a unique string

Here is an example

import Foundation

let uuid1 = UUID().uuidString
print(uuid1)//770C0441-121B-438F-8058-AFE452BFF047

Summary

To summarize, Unique strings are a common requirement in every programming language. Swift provides a default API to generate it.