How to get a unique device ID in Swift

Question

How can I get a devices unique ID in Swift   I need an ID to use in the database and as the API-key for my web service in my social app  Something to keep track of this devices daily use and limit its queries to the database   Thanks

User · Accepted Answer

You can use this  Swift 3    UIDevice current identifierForVendor  uuidString   For older versions   UIDevice currentDevice   identifierForVendor   or if you want a string   UIDevice currentDevice   identifierForVendor  UUIDString    There is no longer a way to uniquely identify a device after the user uninstalled the app s   The documentation says      The value in this property remains the same while the app  or another app from the same vendor  is installed on the iOS device  The value changes when the user deletes all of that vendor   s apps from the device and subsequently reinstalls one or more of them     You may also want to read this article by Mattt Thompson for more details   http   nshipster com uuid-udid-unique-identifier   Update for Swift 4 1  you will need to use   UIDevice current identifierForVendor  uuidString

User · Answer

I ve tried with  let UUID   UIDevice currentDevice   identifierForVendor  UUIDString   instead  let UUID   NSUUID   UUIDString   and it works

User · Answer

The value of identifierForVendor changes when the user deletes all of that vendor   s apps from the device  if you want to keep the unique ID even for the subsequent fresh installations  you can try to use the following function  func vendorIdentifierForDevice  - gt String         Get common part of Applicatoin Bundle ID  Note   getCommonPartOfApplicationBundleID is to be defined      let commonAppBundleID   getCommonPartOfApplicationBundleID         Read from KeyChain using bunndle ID  Note   readFromKeyChain is to be defined      if let vendorID   readFromKeyChain commonAppBundleID            return vendorID       else           var vendorID   NSUUID   uuidString           Save to KeyChain using bunndle ID  Note   saveToKeyChain is to be defined          saveToKeyChain commonAppBundleID  vendorID          return vendorID

User · Answer

if  UIDevice current identifierForVendor  uuidString     nil                       self lblDeviceIdValue text   UIDevice current identifierForVendor  uuidString

User · Answer

class func uuid completionHandler   escaping  String  - gt            if let uuid   UIDevice current identifierForVendor  uuidString           completionHandler uuid            else              If the value is nil  wait and get the value again later  This happens  for example  after the device has been restarted but before the user has unlocked the device             https   developer apple com documentation uikit uidevice 1620059-identifierforvendor language objc         DispatchQueue main asyncAfter deadline   now     1 0                uuid completionHandler  completionHandler

User · Answer

Swift 2 2   func application application  UIApplication  didFinishLaunchingWithOptions launchOptions   NSObject  AnyObject    - gt  Bool        let userDefaults   NSUserDefaults standardUserDefaults        if userDefaults objectForKey  ApplicationIdentifier      nil           let UUID   NSUUID   UUIDString         userDefaults setObject UUID  forKey   ApplicationIdentifier           userDefaults synchronize             return true      Retrieve print NSUserDefaults standardUserDefaults   valueForKey  ApplicationIdentifier

User · Answer

For Swift 3 X Latest Working Code  Easily usage      let deviceID   UIDevice current identifierForVendor  uuidString    print deviceID

User · Answer

You can use identifierForVendor public property present in UIDevice class  let UUIDValue   UIDevice currentDevice   identifierForVendor  UUIDString         print  UUID    UUIDValue      EDIT Swift 3   UIDevice current identifierForVendor  uuidString   END EDIT

User · Answer

You can use devicecheck  in Swift 4  Apple documentation func sendEphemeralToken               check if DCDevice is available  iOS 11             get the   ephemeral   token         DCDevice current generateToken            data  error  in         guard let data   data else               return                      send   ephemeral   token to server to          let token   data base64EncodedString             Alamofire request  quot https   myServer deviceToken quot               Typical usage   Typically  you use the DeviceCheck APIs to ensure that a new user has not already redeemed an offer under a different user name on the same device   Server action needs  See WWDC 2017     Session 702  24 06  more  from Santosh Botre article - Unique Identifier for the iOS Devices  Your associated server combines this token with an authentication key that you receive from Apple and uses the result to request access to the per-device bits

[ios] How to get a unique device ID in Swift?

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