core-location

问题 SITUATION: I followed the following tutorial: https://www.raywenderlich.com/95014/geofencing-ios-swift PROBLEM: The following functions never get triggered: AppDelegate.swift func locationManager(manager: CLLocationManager, didEnterRegion region: CLRegion) { if region is CLCircularRegion { handleRegionEvent(region) } } func locationManager(manager: CLLocationManager, didExitRegion region: CLRegion) { if region is CLCircularRegion { handleRegionEvent(region) } } func handleRegionEvent(region:

问题 func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [AnyObject]!) { var user_lat = manager.location.coordinate.latitude var user_long = manager.location.coordinate.longitude self.locationManager.stopUpdatingLocation() } I've tried String(manager.location.coordinate.latitude) but that doesn't seem to work. 回答1: Try with format let user_lat = String(format: "%f", manager.location.coordinate.latitude) let user_long = String(format: "%f", manager.location.coordinate

问题 I tried to get the user's latitude and longitude but I got result 0.000000 - I have tried following code. I have assign the location manager variable. Location Manager allocated and set the delegate is self. Checked the iOS 8 version validation requesting. Using location start update location function. Code: locationmanager=[[CLLocationManager alloc]init]; locationmanager.delegate=self; // check before requesting, otherwise it might crash in older version if ([locationmanager

问题 The following code results in null coordinates. The weird thing is the UIAlert prompting the app to use current location appears briefly before the user can select yes. My code which i have used : CLLocationManager *locationManager; locationManager.desiredAccuracy = kCLLocationAccuracyBest; [locationManager startUpdatingLocation]; locationManager = [[CLLocationManager alloc] init]; locationManager.distanceFilter = kCLDistanceFilterNone; locationManager.desiredAccuracy =

问题 I am able to draw the polygon on mapView however I need to locate the polygon and zoom it manually. Is there a way to do this process automatically like adjust the polygon in centre? I have browsed the internet and read few related articles, most of them are based on polylines and points. Any kind of help will be appreciated, as I am finding for the solution for a while. Thanks in advance. Using the following methods to draw the polygon on mapView : - func drawFence(coordinates: UnsafePointer

问题 I am working on a project in which i am trying to get location updates in all states, even when app is terminated. I have used all possible solutions but still it's not working in case of termination.For now I want to clear a doubt - I am using startUpdatingLocation() for foreground and background. As we know that startMonitoringSignificantLocationChanges() is the only method that relaunch app in case of any location update. Can we call "startMonitoringSignificantLocationChanges()" in

问题 Can anyone confirm how Significant Location Change works? movement is calculated when the iPhones cell receiver swaps from one cell tower to another as the user moves around? movement is calculated by triangulating between "visible" cell towers to best calculate the users position? movement is calculated by triangulation between "visible" cell towers based on the settings associated with desiredAccuracy? 回答1: Number 1 is the right answer. This is the reason, those updates come not very often.

问题 My Xcode app that I am developing needs to get the latitude and longitude of the users iOS device. Although currently all I get is 0 for both values. It does not ask for permission to have the location, and I am on a real device not a simulator. NSLocationAlwaysUsageDescription is in my info.plist I have also imported CoreLocation and in my .h file @interface LocationViewController : UIViewController <CLLocationManagerDelegate> in my .m file @interface LocationViewController ()

问题 I'm writing a navigation app that tracks the user location. In order to continue showing notification about the route (when phone is locked, answering the phone, etc.) - i also need to continue tracking the location while the app is in the background: (Capabilities>Background Modes>Location updates, locationManager.allowsBackgroundLocationUpdates = true) I have been struggling with this question for a very long time and read a lot about it, but couldn't find the answer i'm looking for. i have

问题 In my app I try to get longitude and latitude from GPS. To do that I have to ask user about permission to access to his location. Before I do that I add to Info.plist this two rulees: Privacy - Location When In Use Usage Description and Privacy - Location Always Usage Description , then in AppDelegate I ask about permission doing it (SWIFT 3.0): if CLLocationManager.locationServicesEnabled() == true { let localisationManager = CLLocationManager() localisationManager