[GitHub] [cordova-plugin-geolocation] breautek commented on issue #177: On iOS speed remains still and does not fall to zero

[GitBox <gi...@apache.org>]

breautek commented on issue #177: On iOS speed remains still and does not fall to zero
URL: https://github.com/apache/cordova-plugin-geolocation/issues/177#issuecomment-540710702
 
 
   iOS geolocation API has a distance filter check, so I suspect when you stop walking, you stop receiving GPS updates (because you're not walking a certain amount of distance anymore) and therefore 
   
   ```javascript
   .subscribe(position => {
   this.currentSpeed = position.coords.speed;
   }
   ```
   
   stops being invoked, with `this.currentSpeed` being the last value it received from the last GPS coordinate you received.
   
   By default, (and hard-coded), the distanceFilter is 5 meters when using high accuracy mode. Below is the code location where the `distanceFilter` is set:
   
   https://github.com/apache/cordova-plugin-geolocation/blob/6570cf9fd2c546620f6aa8b2a07cf0b8b073a95c/src/ios/CDVLocation.m#L140-L151
   
   If you modify this file in your app (search for it within the `platforms/ios/` directory), and change 
   `self.locationManager.distanceFilter = 5;`
   
   to...
   
   `self.locationManager.distanceFilter = 0;`
   
   If it solves you're issue, then perhaps we can look at seeing how we can make the `distanceFilter` configurable.
   
   Also like to be clear that changing code under `platforms/ios/` is not a solution or a workaround as you'll lose your changes the next time you update the ios platform or the plugin. It's just to confirm my suspicion.

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