Add setConfig method to allow modification of geolocation params in real-time

src/ios/CDVBackgroundGeoLocation.h

@@ -14,6 +14,7 @@
 - (void) finish:(CDVInvokedUrlCommand*)command;
 - (void) onPaceChange:(CDVInvokedUrlCommand*)command;
 - (void) setStationaryRadius:(CDVInvokedUrlCommand*)command;
+- (void) setDesiredAccuracy:(CDVInvokedUrlCommand*)command;
 - (void) setDistanceFilter:(CDVInvokedUrlCommand*)command;
 
 - (void) sync:(CLLocation*)location;

src/ios/CDVBackgroundGeoLocation.m

@@ -25,8 +25,8 @@
     CLCircularRegion *myRegion;
     NSInteger stationaryRadius;
     NSInteger distanceFilter;
-    NSInteger locationTimeout;
     NSInteger desiredAccuracy;
+    NSInteger locationTimeout;
 }
 
 - (void)pluginInitialize
@@ -65,22 +65,6 @@
     // Set a movement threshold for new events.
     locationManager.activityType = CLActivityTypeOther;
     locationManager.pausesLocationUpdatesAutomatically = YES;
-
-    switch (desiredAccuracy) {
-        case 1000:
-            locationManager.desiredAccuracy = kCLLocationAccuracyKilometer;
-            break;
-        case 100:
-            locationManager.desiredAccuracy = kCLLocationAccuracyHundredMeters;
-            break;
-        case 10:
-            locationManager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters;
-            break;
-        case 0:
-            locationManager.desiredAccuracy = kCLLocationAccuracyBest;
-            break;
-    }
-    
     locationManager.distanceFilter = distanceFilter; // meters
     
     myRegion = nil;
@@ -140,6 +124,11 @@
     stationaryRadius = [[command.arguments objectAtIndex: 0] intValue];
     NSLog(@"- CDVBackgroundGeoLocation setStationaryRadius %d", stationaryRadius);
     
+    UIApplicationState state = [[UIApplication sharedApplication] applicationState];
+    if (state == UIApplicationStateBackground) {
+        [self setPace:isMoving];
+    }
+    
     CDVPluginResult* result = nil;
     result = [CDVPluginResult resultWithStatus:CDVCommandStatus_OK];
     [self.commandDelegate sendPluginResult:result callbackId:command.callbackId];
@@ -152,11 +141,32 @@
     distanceFilter = [[command.arguments objectAtIndex: 0] intValue];
     NSLog(@"- CDVBackgroundGeoLocation setDistanceFilter %d", distanceFilter);
     
+    UIApplicationState state = [[UIApplication sharedApplication] applicationState];
+    if (state == UIApplicationStateBackground) {
+        [self setPace:isMoving];
+    }
+    
     CDVPluginResult* result = nil;
     result = [CDVPluginResult resultWithStatus:CDVCommandStatus_OK];
     [self.commandDelegate sendPluginResult:result callbackId:command.callbackId];
 }
+/**
+ * Change stationary radius
+ */
+- (void) setDesiredAccuracy:(CDVInvokedUrlCommand *)command
+{
+    desiredAccuracy = [[command.arguments objectAtIndex: 0] intValue];
+    NSLog(@"- CDVBackgroundGeoLocation setDesiredAccuracy %d", desiredAccuracy);
+    
+    UIApplicationState state = [[UIApplication sharedApplication] applicationState];
+    if (state == UIApplicationStateBackground) {
+        [self setPace:isMoving];
+    }
     
+    CDVPluginResult* result = nil;
+    result = [CDVPluginResult resultWithStatus:CDVCommandStatus_OK];
+    [self.commandDelegate sendPluginResult:result callbackId:command.callbackId];
+}
 /**
  * Called by js to signify the end of a background-geolocation event
  */
@@ -283,8 +293,30 @@
  */
 - (void)setPace:(BOOL)value
 {
-    NSLog(@"- CDVBackgroundGeoLocation setPace %d", value);
-    isMoving = value;
+    // When stationaryRadius is 0, don't use sig.changes -- keep GPS on constantly.
+    isMoving = (stationaryRadius == 0) ? YES : value;
+    
+    NSLog(@"- CDVBackgroundGeoLocation setPace");
+    NSLog(@"    isMoving %d", isMoving);
+    NSLog(@"    desiredAccuracy: %d", desiredAccuracy);
+    NSLog(@"    distanceFilter: %d", distanceFilter);
+    NSLog(@"    stationaryRadius: %d", stationaryRadius);
+    
+    switch (desiredAccuracy) {
+        case 1000:
+            locationManager.desiredAccuracy = kCLLocationAccuracyKilometer;
+            break;
+        case 100:
+            locationManager.desiredAccuracy = kCLLocationAccuracyHundredMeters;
+            break;
+        case 10:
+            locationManager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters;
+            break;
+        case 0:
+            locationManager.desiredAccuracy = kCLLocationAccuracyBest;
+            break;
+    }
+    
     if (myRegion != nil) {
         [locationManager stopMonitoringForRegion:myRegion];
         myRegion = nil;

www/BackgroundGeoLocation.js

@@ -66,6 +66,19 @@ module.exports = {
             'onPaceChange',
             [isMoving]);   
     },
+    /**
+    * @param {Integer} stationaryRadius
+    * @param {Integer} desiredAccuracy
+    * @param {Integer} distanceFilter
+    * @param {Integer} timeout
+    */
+    setConfig: function(success, failure, config) {
+        exec(success || function() {},
+            failure || function() {},
+            'BackgroundGeoLocation',
+            'setConfig',
+            [config]);
+    },
     setStationaryRadius: function(value, success, failure) {
         exec(success || function() {},
             failure || function() {},
@@ -73,6 +86,13 @@ module.exports = {
             'setStationaryRadius',
             [value]);
     },
+    setDesiredAccuracy: function(value, success, failure) {
+        exec(success || function() {},
+            failure || function() {},
+            'BackgroundGeoLocation',
+            'setDesiredAccuracy',
+            [value]);
+    },
     setDistanceFilter: function(value, success, failure) {
         exec(success || function() {},
             failure || function() {},