Can you stop regions from persisting between launches with CLLocationManager?

Question

Is there a way to prevent CLLocationManager from persisting monitored regions between launches? Every time the app is launched I need to add a new set of monitored regions and the old ones are no longer useful. Is there a way to either prevent them from persisting or clear all of the old ones at launch time?

Rora

Answer 1

Of course you can clear all the regions currently monitored:

+(void)clearRegionWatch
{
    for(CLRegion *region in [[WGLocation shared].locationManager monitoredRegions]){
        [[WGLocation shared].locationManager stopMonitoringForRegion:region];
    }
}

If you had a specific identifier that you wanted to remove:

+(void)clearRegionWatchForKey:(NSString *)key
{
    for(CLRegion *region in [[WGLocation shared].locationManager monitoredRegions]){
        if([region.identifier isEqualToString:key]){
            [[WGLocation shared].locationManager stopMonitoringForRegion:region];
        }
    }
}

You can copy the internals of the function into an appropriate place in your application. I've copied them from my shared manager class.

Gascony

I've found this to be unreliable. Sometimes it stops monitoring all of the regions, other times it only stops monitoring some of them. – Rora

Interesting, in that case, have you considered reusing the same identifiers? This will overwrite the regions that "are no longer useful" – Gascony

Answer 2

In SWIFT 4 you can stop all the regions from being monitored like

let monitoredRegions = locationManager.monitoredRegions

for region in monitoredRegions{
    locationManager.stopMonitoring(for: region)
}

Editor