app上线IDFA选择注意事项

grep -r advertisingIdentifier 

简单的说，用这条语句检测自己的工程，如果没有查到相关引用，那么就不要勾选使用idfa,如果查到了相关引用，并且这些文件是用于展现广告的用途，那么勾选使用了idfa，然后后面的三个选项按照以下说明来选。

1. publisher: You use third-party ad-networks library to display ad. Choose the 1st option in IDFA -> "Serve advertisements within the app". You‘re a publisher since you show ads, but do not perform advertising for your own app.
2. Advertiser: You use third-party libraries to track conversions for your app, as well as track ‘goals‘ in your app. You directly do not show ads in your app. Choose the 2nd & 3rd option in IDFA -> "Attribute this app installation to a previously served ad". AND "Attribute an action taken within this app to a previously served advertisement".
3. Mixed: You track conversions for your app, as well as display ads in your app. Choose all three options.