Adding a custom message to the location permission alert view

[chrysb]

I've noticed several apps that now add a reason to why they're asking for location, e.g.

MyApp would like to use your current location.

This is so we can add your location to the photos you take.

How is this done?

[BrianSlick]

CLLocationManager

purpose
An application-provided string that describes the reason for using location services.

@property(copy, nonatomic) NSString *purpose
Discussion
If this property is not nil and the system needs to ask for the user’s consent to use location services, it displays the provided string. You can use this string to explain why your application is using location services.

You must set the value of this property prior to starting any location services. Because the string is ultimately displayed to the user, you should always load it from a localized strings file.

I did not know the answer before looking in the documentation.

[chrysb]

Originally Posted by BrianSlick

CLLocationManager



I did not know the answer before looking in the documentation.

Thanks Brian! I've just found that in the sample code.

[pavlicky]

Hi guys,

I have problem with CLLocationManager purpose property. I set it up in my viewDidLoad:

PHP Code:

self.locationManager = [[CLLocationManager alloc] init];
    self.locationManager.delegate = self;
    self.locationManager.desiredAccuracy = kCLLocationAccuracyBest; 
    self.locationManager.distanceFilter = 100;   
    self.locationManager.purpose = [NSString stringWithFormat:@"We'll spy on you!!!"]; 


In my viewWillAppear I call startUpdatingLocation.

However when I launch the app in the simulator or device for the very first time, I get just message "xxx app would like to use your current location" - the purpose string is not shown - why???

Cheers for replies