locationServices enable request fix

@@ -116,32 +116,41 @@ import CoreMotion
     // MARK: Actions
     // MARK: Actions
 
 
     @IBAction private func tripButtonTapped(_ sender: UIButton) {
     @IBAction private func tripButtonTapped(_ sender: UIButton) {
-        if (mIsTripStarted == true) {
-            // Stop trip
-            stopTrip()
+        DispatchQueue.global().async {
+            if (!self.locationServicesIsEnabled()) {
+                self.onLocationServicesIsDisabled();
+                return;
+            }
             
             
-        } else {
-            // Start trip
-            if let limitText = accelerationLimitTextField.text, limitText.isEmpty {
-                // Handle empty limit field
-                return
+            DispatchQueue.main.async {
+                if (self.mIsTripStarted == true) {
+                    // Stop trip
+                    self.stopTrip()
+                    
+                } else {
+                    // Start trip
+                    if let limitText = self.accelerationLimitTextField.text, limitText.isEmpty {
+                        // Handle empty limit field
+                        return
+                    }
+                    
+                    // Disable UI elements
+                    self.accelerationLimitTextField.isEnabled = false
+                    self.sampleTimeTextField.isEnabled = false
+                    
+                    // Start location and sensor updates
+                    self.requestLocationUpdates()
+                    //            registerSensor()
+                    
+                    self.mIsTripStarted = true
+                    self.orientationCountLabel.text = "0"
+                    self.touchCountLabel.text = "0"
+                    self.tripButton.setTitle("Stop Trip", for: .normal)
+                    self.mStartTimestamp = String(Int(Date().timeIntervalSince1970 * 1000)) // time in milliseconds since January 1, 1970
+                    self.initializeOrientation()
+                    self.startTimer()
+                }
             }
             }
-
-            // Disable UI elements
-            accelerationLimitTextField.isEnabled = false
-            sampleTimeTextField.isEnabled = false
-
-            // Start location and sensor updates
-            requestLocationUpdates()
-//            registerSensor()
-
-            mIsTripStarted = true
-            orientationCountLabel.text = "0"
-            touchCountLabel.text = "0"
-            tripButton.setTitle("Stop Trip", for: .normal)
-            mStartTimestamp = String(Int(Date().timeIntervalSince1970 * 1000)) // time in milliseconds since January 1, 1970
-            initializeOrientation()
-            startTimer()
         }
         }
     }
     }
     
     
@@ -289,21 +298,25 @@ import CoreMotion
     }
     }
 
 
     private func requestLocationUpdates() {
     private func requestLocationUpdates() {
-        if CLLocationManager.locationServicesEnabled() {
-            locationManager.desiredAccuracy = kCLLocationAccuracyBest
-//            locationManager.requestLocation()
-            
-            if (!locationServicesIsEnabled()) {
-                onLocationServicesIsDisabled();
-            }
-            else if (authorizationStatusIsDenied(status: CLLocationManager.authorizationStatus())) {
-                onAuthorizationStatusIsDenied();
-            }
-            else if (authorizationStatusNeedRequest(status: CLLocationManager.authorizationStatus())) {
-                onAuthorizationStatusNeedRequest();
-            }
-            else if (authorizationStatusIsGranted(status: CLLocationManager.authorizationStatus())) {
-                onAuthorizationStatusIsGranted();
+        DispatchQueue.global().async {
+            if CLLocationManager.locationServicesEnabled() {
+                self.locationManager.desiredAccuracy = kCLLocationAccuracyBest
+    //            locationManager.requestLocation()
+                
+                if (!self.locationServicesIsEnabled()) {
+                    self.onLocationServicesIsDisabled();
+                }
+                else if (self.authorizationStatusIsDenied(status: CLLocationManager.authorizationStatus())) {
+                    self.onAuthorizationStatusIsDenied();
+                }
+                else if (self.authorizationStatusNeedRequest(status: CLLocationManager.authorizationStatus())) {
+                    self.onAuthorizationStatusNeedRequest();
+                }
+                else if (self.authorizationStatusIsGranted(status: CLLocationManager.authorizationStatus())) {
+                    self.onAuthorizationStatusIsGranted();
+                }
+            } else {
+                self.onLocationServicesIsDisabled();
             }
             }
         }
         }
     }
     }