Merge pull request #70 from jrtapiaO/develop

Crash fix - ios8 - CLLocationManager.allowsBackgroundLocationUpdates

Author: Joseph Kalash

iOS_SDK/OneSignal/OneSignalLocation.m

@@ -160,7 +160,8 @@ + (void) internalGetLocation:(bool)prompt {
     locationManager = [[clLocationManagerClass alloc] init];
     [locationManager setValue:[self sharedInstance] forKey:@"delegate"];
 
-    if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 8.0) {
+    float deviceOSVersion = [[[UIDevice currentDevice] systemVersion] floatValue];
+    if (deviceOSVersion >= 8.0) {
 
         //Check info plist for request descriptions
         //LocationAlways > LocationWhenInUse > No entry (Log error)
@@ -169,7 +170,9 @@ + (void) internalGetLocation:(bool)prompt {
         NSString* alwaysDescription = [[NSBundle mainBundle] objectForInfoDictionaryKey:@"NSLocationAlwaysUsageDescription"];
         if(backgroundModes && [backgroundModes containsObject:@"location"] && alwaysDescription) {
             [locationManager performSelector:@selector(requestAlwaysAuthorization)];
-            [locationManager setValue:@YES forKey:@"allowsBackgroundLocationUpdates"];
+            if (deviceOSVersion >= 9.0) {
+                [locationManager setValue:@YES forKey:@"allowsBackgroundLocationUpdates"];
+            }
         }
 
         else if([[NSBundle mainBundle] objectForInfoDictionaryKey:@"NSLocationWhenInUseUsageDescription"])