In iOS 8 the MKMapView requests by default the permission to track the user's location even when the app is in the background. Is there any way to change this, so as to request only the NSLocationWhenInUseUsageDescription permission?
I am not using a custom CLLocationManager, since I do not need it for anything else apart from displaying the user location on the map. Is it possible to avoid using a custom CLLocationManager?
I don't think you can use location without the user giving permission. Imagine the problems if everyone could just track a device location without the user's knowledge?
Related
Using Apples MapKit API, is there a way to add a listener to determine if the user's current location has changed? Is it also possible to do this in the background while the app is not running?
Please see this post for listener to determine user's location change. This is not possible to be done in background. In iOS, when your app is not running, it cannot report location or anything.
I'm doing an app to trigger a local notification when a region is entered.
However, sometimes when the phone is locked, the notifications didn't pop up even I've been in the region area for a while. The notification popup will show only when the power/home button is pressed(phone still in locked mode).
In general, all seems to be working except that sometimes the notification will show only when power/home button is pressed to awake the phone although it is still locked.
Hope someone can enlighten me please! =)
According to the developer documentation. In core-location framework, two services can give you the current location information.
The standard location service is a configurable, general-purpose solution for getting location data and tracking location changes for the specified level of accuracy.
The significant-change location service delivers updates only when there has been a significant change in the device’s location, such as 500 meters or more.
You need to use standard location services to keep monitoring location in background
If your iOS app must keep monitoring location even while it’s in the background, use the standard location service and specify the location value of the UIBackgroundModes key to continue running in the background and receiving location updates. (In this situation, you should also make sure the location manager’s pausesLocationUpdatesAutomatically property is set to YES to help conserve power.)
I am implementing an App with continuous background updates on iOS 9. Even with allowsBackgroundUpdates set to YES, AlwaysUsage Description and with proper authorisation i am not getting location updates continuously. I am using Standard Location Services and Significant Location Services but not receiving any location updates when App is in Background. (App is in background/suspended but not terminated). Can anyone let me know if i have missed anything? Thanks in advance.
If your iOS app must keep monitoring location even while it’s in the background, use the standard location service and specify the location value of the UIBackgroundModes key to continue running in the background and receiving location updates. (In this situation, you should also make sure the location manager’s pausesLocationUpdatesAutomatically property is set to YES to help conserve power.) Examples of apps that might need this type of location updating are fitness or turn-by-turn navigation apps
This is my scenario: I need to get the user's current location punctually in order to show them a set of nearby points of interest in an MKMapView. I don't need to keep track of user's location. I need someone to clarify which the best way to do this should be:
1) ASFAIK, is it possible to get the current location by calling mapItemForCurrentLocation. You get an MKMapItem object, and I think that this call does not need to have the location services enabled, but I'm not sure if it is possible to get the coordinates for the location this way... is it?
2) Start a CLLocationManager and listen for location updates. And then just take the first location received and stop listening.
I need this to work for iOS 7+
Thanks
For an MKMapView object to be showing user location you will have to have requested authorisation for iOS8 (ie using requestWhenInUseAuthorization on a CLLocationManager object).
MKMapView objects have a didUpdateUserLocation: delegate method you could use receive user location updates, but this may fire off repeatedly until it reaches the accuracy the map requires - you might need to ignore later updates depending on what you're doing.
Based on your scenario it could be better to use CLLocationManger, then stop requesting updates once you have a fix of required accuracy.
I need to get exact location (as much accurate as possible) in background while making a call to a phone number (The call will be made from app). As far as I understand from documentation, I can listen to significant changes of location in background. I am wondering how accurate is a significant update and when will it trigger.
I need the location where the call is made because it will be an emergency call. And it's not a good idea to listen to location in foreground and then make a call because it will be an emergency situation - call will be made immediately.
Is there a solution to get accurate location of user in background? What do you recommend?
Edit: Location will be sent to server immediately.
As for the accuracy, you can get accurate location in the background, under those conditions:
Getting Location Events in the Background
If your application needs location updates delivered whether the application is in the foreground or background, there are multiple options for doing so. The preferred option is to use the significant location change service to wake your application at appropriate times to handle new events. However, if your application needs to use the standard location service, you can declare your application as needing background location services.
An application should request background location services only if the absence of those services would impair its ability to operate. In addition, any application that requests background location services should use those services to provide a tangible benefit to the user. For example, a turn-by-turn navigation application would be a likely candidate for background location services because of its need to track the user’s position and report when it is time to make the next turn.
As for getting location during phone call, I didn't use it myself, but navigation apps like 'waze' do inform turns and navigation events during a phone call so I guess what you ask is possible.
If I understand your needs, you have 2 options:
If you think that the user will be static then simply get the user location right before the call is made. Or better when your app is lunched to make the emergency call.
If the user is moving then you can 'ask' to get background location events. Even then you should consider using 'significant-change location service' as you don't need more then the user location. The standard 'location services' are used for navigation 'Turn by turn' services.
*LAST COMMENT *
If your app is an emergency app you shold read the "Tips for Conserving Battery Power" in the previous link. you don't want your user battery to empty while tracking his location.
Can't you like add that flag in your app plist file to request Location Service to be running in the background mode.
Then in your app, when the user presses the "call" button, you can do your normal CLLocationManager didUpdateToLocation, right before you perform the call.
In your didUpdateToLocation method, you can record the user's location either in a TXT file written to the application sandbox Library/Cache folder or you can use NSUserDefaults.
Note: I've written an app that records the user's GPS location as they drive even when the user presses the lock screen, so I am confident your app can write the GPS coordinate to a TXT file even when the app is minimized, as long as you start your location manager.