问HN：iOS版Lyft应用是如何检测到我已经到达机场的？
我在不使用应用时关闭了定位服务，并在iOS中关闭了后台应用刷新，但不知为何，Lyft仍然知道我在机场，并向我推送了广告通知。我想关闭这个功能，但我想不出这是怎么发生的。
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I have location services turned off while I’m not using the app and background app refresh turned off in iOS, but somehow Lyft still knows I’m at the airport and serves me a push notification ad.<p>I want to turn this off but I can’t think of how this is happening in the first place.