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

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
}