try

Assets/AppsFlyer/Editor/AppsFlyerDependencies.xml

@@ -12,6 +12,7 @@
 
   <iosPods>
     <iosPod name="AppsFlyerFramework" version="6.14.4" minTargetSdk="12.0">
+
     </iosPod>
   </iosPods>
 

packageUnity/Assets/AppsFlyer/AFInAppEvents.cs

@@ -0,0 +1,72 @@
+using UnityEngine;
+using System.Collections;
+
+public class AFInAppEvents {
+	/**
+	 * Event Type
+	 * */
+	public const string LEVEL_ACHIEVED = "af_level_achieved";
+	public const string ADD_PAYMENT_INFO = "af_add_payment_info";
+	public const string ADD_TO_CART = "af_add_to_cart";
+	public const string ADD_TO_WISH_LIST = "af_add_to_wishlist";
+	public const string COMPLETE_REGISTRATION = "af_complete_registration";
+	public const string TUTORIAL_COMPLETION = "af_tutorial_completion";
+	public const string INITIATED_CHECKOUT = "af_initiated_checkout";
+	public const string PURCHASE = "af_purchase";
+	public const string RATE = "af_rate";
+	public const string SEARCH = "af_search";
+	public const string SPENT_CREDIT = "af_spent_credits";
+	public const string ACHIEVEMENT_UNLOCKED = "af_achievement_unlocked";
+	public const string CONTENT_VIEW = "af_content_view";
+	public const string TRAVEL_BOOKING = "af_travel_booking";
+	public const string SHARE = "af_share";
+	public const string INVITE = "af_invite";
+	public const string LOGIN = "af_login";
+	public const string RE_ENGAGE = "af_re_engage";
+	public const string UPDATE = "af_update";
+	public const string OPENED_FROM_PUSH_NOTIFICATION = "af_opened_from_push_notification";
+	public const string LOCATION_CHANGED = "af_location_changed";
+	public const string LOCATION_COORDINATES = "af_location_coordinates";
+	public const string ORDER_ID = "af_order_id";
+	/**
+	 * Event Parameter Name
+	 * **/
+	public const string LEVEL = "af_level";
+	public const string SCORE = "af_score";
+	public const string SUCCESS = "af_success";
+	public const string PRICE = "af_price";
+	public const string CONTENT_TYPE = "af_content_type";
+	public const string CONTENT_ID = "af_content_id";
+	public const string CONTENT_LIST = "af_content_list";
+	public const string CURRENCY = "af_currency";
+	public const string QUANTITY = "af_quantity";
+	public const string REGSITRATION_METHOD = "af_registration_method";
+	public const string PAYMENT_INFO_AVAILIBLE = "af_payment_info_available";
+	public const string MAX_RATING_VALUE = "af_max_rating_value";
+	public const string RATING_VALUE = "af_rating_value";
+	public const string SEARCH_STRING = "af_search_string";
+	public const string DATE_A = "af_date_a";
+	public const string DATE_B = "af_date_b";
+	public const string DESTINATION_A = "af_destination_a";
+	public const string DESTINATION_B = "af_destination_b";
+	public const string DESCRIPTION = "af_description";
+	public const string CLASS = "af_class";
+	public const string EVENT_START = "af_event_start";
+	public const string EVENT_END = "af_event_end";
+	public const string LATITUDE = "af_lat";
+	public const string LONGTITUDE = "af_long";
+	public const string CUSTOMER_USER_ID = "af_customer_user_id";
+	public const string VALIDATED = "af_validated";
+	public const string REVENUE = "af_revenue";
+	public const string RECEIPT_ID = "af_receipt_id";
+	public const string PARAM_1 = "af_param_1";
+	public const string PARAM_2 = "af_param_2";
+	public const string PARAM_3 = "af_param_3";
+	public const string PARAM_4 = "af_param_4";
+	public const string PARAM_5 = "af_param_5";
+	public const string PARAM_6 = "af_param_6";
+	public const string PARAM_7 = "af_param_7";
+	public const string PARAM_8 = "af_param_8";
+	public const string PARAM_9 = "af_param_9";
+	public const string PARAM_10 = "af_param_10";
+}