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

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 
    }        
}