How to get a unique device ID in Swift? - ios

Question

How can I get a device's 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.

Answer 1

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

Answer 2

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("https://myServer/deviceToken" ...
}
}
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.

Answer 3

For Swift 3.X Latest Working Code, Easily usage;
let deviceID = UIDevice.current.identifierForVendor!.uuidString
print(deviceID)

Answer 4

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

Answer 5

In swift 4,5
You can get UUID using below code.
print(UIDevice.current.identifierForVendor!.uuidString)
Output
Apart from that you can get multiple properties from connected Device.
UIDevice.current.name // e.g. "My iPhone"
UIDevice.current.model // e.g. #"iPhone", #"iPod touch"
UIDevice.current.localizedModel // localized version of model
UIDevice.current.systemName // e.g. #"iOS"
UIDevice.current.systemVersion // e.g. #"15.5"

Answer 6

Swift 2.2
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> 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")!)

Answer 7

if (UIDevice.current.identifierForVendor?.uuidString) != nil
{
self.lblDeviceIdValue.text = UIDevice.current.identifierForVendor?.uuidString
}

Answer 8

From iOS 11 onwards you can use Apple's api: DeviceCheck

Answer 9

class func uuid(completionHandler: #escaping (String) -> ()) {
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)
}
}
}

Answer 10

I've tried with
let UUID = UIDevice.currentDevice().identifierForVendor?.UUIDString
instead
let UUID = NSUUID().UUIDString
and it works.