How to retrieve iPhone IDFA from API?

Question

I would like to get the device IDFA. How to get this info from iOS official API ?

Answer 1

Just to extend Amro's Swift answer, here's similar code wrapped in a method:

import AdSupport

...

func provideIdentifierForAdvertisingIfAvailable() -> String? {
    if ASIdentifierManager.sharedManager().advertisingTrackingEnabled {
      return ASIdentifierManager.sharedManager().advertisingIdentifier?.UUIDString ?? nil
    } else {
      return nil
    }
  }

Answer 2

A nicer approach to get the IDFA or nil if tracking is disabled via iOS Setting is using a (private) extension:

import AdSupport

class YourClass {

    func printIDFA() {
        print(ASIdentifierManager.shared().advertisingIdentifierIfPresent)
    }
}

private extension ASIdentifierManager {

    /// IDFA or nil if ad tracking is disabled via iOS system settings
    var advertisingIdentifierIfPresent: String? {
        if isAdvertisingTrackingEnabled {
            return advertisingIdentifier.uuidString
        }

        return nil 
    }        
}

Answer 3

Beginning in iOS 10, when a user enables “Limit Ad Tracking,” the OS will send along the advertising identifier with a new value of “00000000-0000-0000-0000-000000000000.”

As per this article: https://fpf.org/2016/08/02/ios-10-feature-stronger-limit-ad-tracking/

Answer 4

Swift 3 & 4

var IDFA = String()
if ASIdentifierManager.shared().isAdvertisingTrackingEnabled {
            IDFA = ASIdentifierManager.shared().advertisingIdentifier
}

Answer 5

Here's a commented helper class in Swift that will give you a nil object for the identifier if the user has turned advertisement tracking off:

import AdSupport

class IDFA {
    // MARK: - Stored Type Properties
    static let shared = IDFA()

    // MARK: - Computed Instance Properties
    /// Returns `true` if the user has turned off advertisement tracking, else `false`.
    var limited: Bool {
        return !ASIdentifierManager.shared().isAdvertisingTrackingEnabled
    }

    /// Returns the identifier if the user has turned advertisement tracking on, else `nil`.
    var identifier: String? {
        guard !limited else { return nil }
        return ASIdentifierManager.shared().advertisingIdentifier.uuidString
    }
}

Just add it to your project (for example in a file named IDFA.swift) and link the AdSupport.framework in your target via the "Linked Frameworks and Libraries" section in the General settings tab.

Then you can use it like this:

if let identifier = IDFA.shared.identifier {
    // use the identifier
} else {
    // put any fallback logic in here
}

Answer 6

Get IDFA in Swift:

    import AdSupport

    ...

    let myIDFA: String?
    // Check if Advertising Tracking is Enabled
    if ASIdentifierManager.sharedManager().advertisingTrackingEnabled {
        // Set the IDFA
        myIDFA = ASIdentifierManager.sharedManager().advertisingIdentifier.UUIDString
    } else {
        myIDFA = nil
    }