How to find UDID for ios9

Question

Since iOS 7 it's impossible to get UDID directly on an Apple iOS device.

i know apple suggests for using UIDevice.currentDevice().identifierForVendor?.UUIDString. but it changes every time after uninstalling the app.

i want to send GCM to the users, and per user, there are two to three ios devices. so for identifying the devices uniquely i want UDID.

for ex. if user has two devices

in my server database i'm storing it like this

userID->>> abc@xyz.com

GCMID->>> {UDIDForDevice1:GCMTokenForDevice1,UDIDForDevice2:GCMTOkenForDevice2}

Vendor specific UDID doesn't necessarily change after uninstalling the app. Why do you need the UDID and why doesn't vendor specific ID work for you? — nhgrif, May 02 '16 at 12:40
i want to send GCM to the users, and per user, there are two to three ios devices. so for identifying the devices uniquely i want UDID. — Parth Bhuva, May 02 '16 at 12:45
So, your *actual* question is how to identify unique devices across a single user? Because `vendorSpecificId` does that. — nhgrif, May 02 '16 at 12:50
UIDevice.currentDevice().identifierForVendor?.UUIDString changes every time when i re install the app. so i can't use it — Parth Bhuva, May 02 '16 at 13:00
You need to update your question and clarify exactly what you do need rather than asking people to speculate on how something else works. — nhgrif, May 02 '16 at 13:03

score 1 · Accepted Answer · edited May 23 '17 at 12:16

If you want to really uniquely identify a device, store a UUID on the keychain. See How to preserve identifierForVendor in ios after uninstalling ios app on device?.

For GCM you should probably use the Instance ID API instead of inventing your own identification format.

For the original question, the site www.easy-udid.com uses Over-the-Air Profile Delivery and Configuration to obtain the UDID and other device information.

The "Get my UDID" button links to a qilin.en.mobileconfig file, which is a Configuration Profile plist file with the following content:

{
  "PayloadType":"Profile Service",
  "PayloadContent":{
    "DeviceAttributes":[
      "UDID",
      "VERSION",
      "PRODUCT",
      "SERIAL"
    ],
    "URL":"http://www.easy-udid.com/retrieve.php"
  },
  ...
}

When the user installs the profile, the phone will send the UDID, version, product and serial number while opening the provided URL (http://www.easy-udid.com/retrieve.php). The server can then display the result to the user.

See https://developer.apple.com/library/ios/documentation/NetworkingInternet/Conceptual/iPhoneOTAConfiguration/ConfigurationProfileExamples/ConfigurationProfileExamples.html for some sample responses.

(But I doubt why you need a permanent ID for cloud messaging)........... because i am storing GCM token to my server in database in a key value form {deviceID:GCMToken} — Parth Bhuva, May 02 '16 at 13:13
@Parth It seems you are supposed to use Instance ID anyway. Please check update. — kennytm, May 02 '16 at 13:21

How to find UDID for ios9

1 Answers1