i have been using the significant event location manager on ios, but it seems it does not based on cell change as claimed.
i used a simple application utilising significant location event, but i could not get a repeatable, consistent or sensitive response from the ios sdk.
i plotted the route (blue line), the cell towers(place mark) and a 1000m2 grid(blue square) on the map below. map showing route
the route was 5000m in distance.
i drove it 3 times.
- test1. received 2 sig events
- test2. none
- test3. received 1 sig events
before u complain that my test is too small, i have been monitoring other test routes for days and all show the inconsistent shape.
i was expecting the sig event to be based on cell tower switching. so i used a jailbreak app called 'signal' to identify what is the active cell. (NB.it is surprising which cell is active. Not what i would expect.)
From monitoring the 'signal' application, the cells switched around 6-7 times from what i noticed.
yet i did not received 6-7 sig events. So i cant see any correlation between cell switching and significant events.
so i have the following questions
- Q1. what is the significant event trigger?
- Q2. why are the result unreliable/inconsistent.
- Q3. how can i get make my app receive consistent and sensitive significant event to 500m?
This is the code that is running in the test app
-(void)initLocationManager {
if (locationManager == nil) {
self.locationManager = [[[CLLocationManager alloc] init] autorelease];
locationManager.delegate = self;
locationManager.desiredAccuracy = kCLLocationAccuracyBest;
[locatio