迅速，当应用程序被杀死时将用户的当前位置发送到服务器

Question

I am creating a Taxi Driver application in swift. I need to send the driver's current location to the server by every 30 sec even app is killed. I found the solution while the app is in the foreground or background state. But I am not able to send location to server while app is killed. I tried with VOIP push and startMonitoringSignificantLocationChanges .

1. When the app is killed and VOIP push receives by every 30 sec, I can get the user's location but, I am not able to call API and send a location to the server. Can anyone have a solution for sending data to the server while the app is killed?

2. Using startMonitoringSignificantLocationChanges while the app is killed I am able to send location to the server, but it takes 5 to 10 minutes to get user's updated location while he/she is driving. I tried physically by traveling from one location to another location so many times. Apple doc tells that location updates when user's position changes by a significant amount, such as 500 meters. But in reality, it updates by 5km to 7km traveling. Can anyone have a solution for it?

Answer 1

App refresh is good idea but iOS allows only 35 to 40 seconds in background to wake up your app in background so you should call your functions in this period of time.. here is good example for location based background tasks Usage

and and and apple document says if you use silent push notification. However, the system does not automatically launch your app if the user has force-quit it..refer this

Answer 2

“If your app is terminated either by a user or by the system, the system doesn't automatically restart your app when new location updates arrive. A user must explicitly relaunch your app before the delivery of location updates resumes. The only way to have your app relaunched automatically is to use region monitoring or significant-change location service. However, when a user disables the Background App Refresh setting either globally or specifically for your app, the system doesn't relaunch your app for any location events, including significant change or region monitoring events. Further, while Background App Refresh is off your app won't receive significant change or region monitoring events even when it's in the foreground.” more...