问题
iOS used to wake up my app in background when it was killed, during location updates.
After updating to iOS 11, the "wake up" process takes longer (after the user covered a distance of a mile or 2). I haven't seen any new changes to the location manager documentation which relates to this.
Any one else experiencing the same issue??
来源：https://stackoverflow.com/questions/46361459/why-location-updates-in-background-mode-is-slow-after-ios-11-update