move location access requesting from init

android/src/main/java/com/reactlibrary/RNSimpleCompassModule.java

@@ -7,6 +7,8 @@
 import android.hardware.SensorManager;
 
 import android.content.Context;
+
+import com.facebook.react.bridge.WritableMap;
 import com.facebook.react.modules.core.DeviceEventManagerModule;
 import com.facebook.react.bridge.Arguments;
 
@@ -74,10 +76,14 @@ public void onSensorChanged(SensorEvent event) {
           }
 
           mAzimuth = newAzimuth;
+          WritableMap map = Arguments.createMap();
+
+          map.putDouble("heading", mAzimuth);
+          map.putDouble("accuracy",event.accuracy);
 
           getReactApplicationContext()
                   .getJSModule(DeviceEventManagerModule.RCTDeviceEventEmitter.class)
-                  .emit("HeadingUpdated", mAzimuth);
+                  .emit("HeadingUpdated", map);
       }
   }
 

index.js

@@ -1,5 +1,4 @@
-
-import { NativeModules, NativeEventEmitter } from 'react-native';
+import { NativeModules, NativeEventEmitter, Dimensions } from "react-native";
 const { RNSimpleCompass } = NativeModules;
 
 let listener;
@@ -12,18 +11,21 @@ RNSimpleCompass.start = (update_rate, callback) => {
   }
 
   const compassEventEmitter = new NativeEventEmitter(RNSimpleCompass);
-  listener = compassEventEmitter.addListener('HeadingUpdated', (degree) => {
-    callback(degree);
+  listener = compassEventEmitter.addListener("HeadingUpdated", course => {
+    const correctedCourse = { ...course };
+    const { height, width } = Dimensions.get("window");
+    if (width > height) correctedCourse.heading += 90;
+    callback(correctedCourse);
   });
 
   _start(update_rate === null ? 0 : update_rate);
-}
+};
 
 let _stop = RNSimpleCompass.stop;
 RNSimpleCompass.stop = () => {
   listener && listener.remove();
   listener = null;
   _stop();
-}
+};
 
 export default RNSimpleCompass;

ios/RNSimpleCompass.m

@@ -15,16 +15,12 @@ - (instancetype)init {
         if ([CLLocationManager headingAvailable]) {
             self.locationManager = [[CLLocationManager alloc] init];
             self.locationManager.delegate = self;
-            if ([CLLocationManager authorizationStatus] == kCLAuthorizationStatusNotDetermined) {
-                NSLog(@"Requesting permission");
-                [self.locationManager requestWhenInUseAuthorization];
-            }
         }
         else {
             NSLog(@"Heading not available");
         }
     }
-
+    
     return self;
 }
 
@@ -40,7 +36,10 @@ - (void)locationManager:(CLLocationManager *)manager didUpdateHeading:(CLHeading
     if (newHeading.headingAccuracy < 0) {
         return;
     }
-    [self sendEventWithName:kHeadingUpdated body:@(newHeading.trueHeading)];
+    [self sendEventWithName:kHeadingUpdated body:(@{
+                                                    @"heading": @(newHeading.trueHeading),
+                                                    @"accuracy": @(newHeading.headingAccuracy)
+                                                    })];
 }
 
 - (void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status {
@@ -60,6 +59,10 @@ - (BOOL)locationManagerShouldDisplayHeadingCalibration:(CLLocationManager *)mana
 #pragma mark - React
 
 RCT_EXPORT_METHOD(start: (NSInteger) headingFilter) {
+    if ([CLLocationManager authorizationStatus] == kCLAuthorizationStatusNotDetermined) {
+        NSLog(@"Requesting permission");
+        [self.locationManager requestWhenInUseAuthorization];
+    }
     self.locationManager.headingFilter = headingFilter;
     [self.locationManager startUpdatingHeading];
 }
@@ -71,3 +74,4 @@ - (BOOL)locationManagerShouldDisplayHeadingCalibration:(CLLocationManager *)mana
 RCT_EXPORT_MODULE()
 
 @end
+

package.json

@@ -1,6 +1,6 @@
 {
   "name": "react-native-simple-compass",
-  "version": "1.0.0",
+  "version": "1.0.1",
   "description": "Simple module exposing the compass on iOS and Android",
   "main": "index.js",
   "scripts": {