I am trying to just NSLog co-ordinates in my console, but it is not working.
I have the core location linked in header
#implementation ViewController {
CLLocationManager *locationManager;
}
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
locationManager = [[CLLocationManager alloc] init];
locationManager.delegate = self;
locationManager.desiredAccuracy = kCLLocationAccuracyBest;
[locationManager startUpdatingLocation];
}
- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error
{
NSLog(#"didFailWithError: %#", error);
UIAlertView *errorAlert = [[UIAlertView alloc]
initWithTitle:#"Error" message:#"Failed to Get Your Location" delegate:nil cancelButtonTitle:#"OK" otherButtonTitles:nil];
[errorAlert show];
}
- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
{
NSLog(#"didUpdateToLocation: %#", newLocation);
CLLocation *currentLocation = newLocation;
if (currentLocation != nil) {
NSLog(#"%f", currentLocation.coordinate.longitude);
NSLog(#"%f", currentLocation.coordinate.latitude);
}
}
But I am not getting anything in the console, does anybody know what could be going wrong?
Since iOS 8 you have to ask for user's permission before starting to update the location.
Before that you have to add the messages that the user will receive alongside the request for permission. In your .plist file add those 2 keys (if you want to use both types of location fetching) and fill them with your own message: NSLocationWhenInUseUsageDescription ,NSLocationAlwaysUsageDescription
Afterwards ask for permission, right before starting the CLLocationManager:
[self.locationManager requestWhenInUseAuthorization];
or / and
[self.locationManager requestAlwaysAuthorization];
To avoid crashes on iOS 7 and below you can define a macro to check the OS version:
#define IS_OS_8_OR_LATER ([[[UIDevice currentDevice] systemVersion] floatValue] >= 8.0)
And then you can do:
if(IS_OS_8_OR_LATER) {
// Use one or the other, not both. Depending on what you put in info.plist
[self.locationManager requestWhenInUseAuthorization];
[self.locationManager requestAlwaysAuthorization];
}
Now it should work.
Macro source: iOS 8 Map Kit Obj-C Cannot Get Users Location
Related
I am trying to obtain current user location through my app. I wrote all delegate methods, added strings in info.plist but still it is not calling the delegate methods. Please help me.
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
self.locationManager = [[CLLocationManager alloc] init];
self.locationManager.delegate = self;
if(IS_OS_8_OR_LATER){
NSUInteger code = [CLLocationManager authorizationStatus];
if (code == kCLAuthorizationStatusNotDetermined &&([self.locationManager respondsToSelector:#selector(requestAlwaysAuthorization)] || [self.locationManager respondsToSelector:#selector(requestWhenInUseAuthorization)])) {
// choose one request according to your business.
if([[NSBundle mainBundle] objectForInfoDictionaryKey:#"NSLocationAlwaysUsageDescription"]){
[self.locationManager requestAlwaysAuthorization];
} else if([[NSBundle mainBundle] objectForInfoDictionaryKey:#"NSLocationWhenInUseUsageDescription"]) {
[self.locationManager requestWhenInUseAuthorization];
} else {
NSLog(#"Info.plist does not contain NSLocationAlwaysUsageDescription or NSLocationWhenInUseUsageDescription");
}
}
}
[self.locationManager startUpdatingLocation];
}
#pragma mark - CLLocationManagerDelegate
- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error
{
NSLog(#"didFailWithError: %#", error);
UIAlertView *errorAlert = [[UIAlertView alloc]
initWithTitle:#"Error" message:#"Failed to Get Your Location" delegate:nil cancelButtonTitle:#"OK" otherButtonTitles:nil];
[errorAlert show];
}
- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
{
NSLog(#"didUpdateToLocation: %#", newLocation);
CLLocation *currentLocation = newLocation;
if (currentLocation != nil) {
longitude = [NSString stringWithFormat:#"%.8f", currentLocation.coordinate.longitude];
latitude = [NSString stringWithFormat:#"%.8f", currentLocation.coordinate.latitude];
}
}
The console logs itself says that you are missing to add appropriate Keys in info.plist file
You are supposed to add
NSLocationWhenInUseUsageDescription
NSLocationAlwaysUsageDescription
keys with relevant description and then make a request from user to allow access.
This link might be helpful.
Since you have already added these keys try following
Remove the keys and re-add.
Once done try to do a clean and then build you application.
This question already has an answer here:
how to get current location lat long in ios 8?
(1 answer)
Closed 7 years ago.
I have been working on an ios8 program for a while, I need the source code of getting current location, if you have these please upload it in a zip file.
You need to do following stuff for iOS8:
#define IS_OS_8_OR_LATER ([[[UIDevice currentDevice] systemVersion] floatValue] >= 8.0)
-(void)viewDidLoad
{
[super viewDidLoad];
self.locationManager = [[CLLocationManager alloc] init];
self.locationManager.delegate = self;
if(IS_OS_8_OR_LATER){
NSUInteger code = [CLLocationManager authorizationStatus];
if (code == kCLAuthorizationStatusNotDetermined && ([self.locationManager respondsToSelector:#selector(requestAlwaysAuthorization)] || [self.locationManager respondsToSelector:#selector(requestWhenInUseAuthorization)])) {
// choose one request according to your business.
if([[NSBundle mainBundle] objectForInfoDictionaryKey:#"NSLocationAlwaysUsageDescription"]){
[self.locationManager requestAlwaysAuthorization];
} else if([[NSBundle mainBundle] objectForInfoDictionaryKey:#"NSLocationWhenInUseUsageDescription"]) {
[self.locationManager requestWhenInUseAuthorization];
} else {
NSLog(#"Info.plist does not contain NSLocationAlwaysUsageDescription or NSLocationWhenInUseUsageDescription");
}
}
}
[self.locationManager startUpdatingLocation];
}
#pragma mark - CLLocationManagerDelegate
- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error
{
NSLog(#"didFailWithError: %#", error);
UIAlertView *errorAlert = [[UIAlertView alloc]
initWithTitle:#"Error" message:#"Failed to Get Your Location" delegate:nil cancelButtonTitle:#"OK" otherButtonTitles:nil];
[errorAlert show];
}
- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
{
NSLog(#"didUpdateToLocation: %#", newLocation);
CLLocation *currentLocation = newLocation;
if (currentLocation != nil) {
longitudeLabel.text = [NSString stringWithFormat:#"%.8f", currentLocation.coordinate.longitude];
latitudeLabel.text = [NSString stringWithFormat:#"%.8f", currentLocation.coordinate.latitude];
}
}
You need to do two extra things to get location working:
Add a key to your Info.plist
Request authorization from the location manager asking it to start.
Any one or both of below keys needs to be added in Info.plist file.
NSLocationWhenInUseUsageDescription
NSLocationAlwaysUsageDescription
These are of String type and value can be any message description or empty.
Now you need to request authorisation for corresponding location method. Use any one of below calls :
[self.locationManager requestWhenInUseAuthorization]
[self.locationManager requestAlwaysAuthorization]
In my iOS application, I have a table that uses your location to find data that is near you. I just installed it on my iPhone today, and when location services were needed, I got the expected alert that said "MyAppName would like to use your current location" and once I pressed OK, the app basically froze. When I closed the app and reopened it however, it worked perfectly fine. Now that I think about it, this happened on the simulator as well, as I have to run the app a couple times before location services works properly there too. Has this happened to anyone else, and do you know how to fix this? I don't want my users to have to close the app and reopen it for location services to work properly.
Here is some relevant code:
- (void)viewDidLoad
{
[super viewDidLoad];
locationManager = [[CLLocationManager alloc] init];
locationManager.delegate = self;
locationManager.desiredAccuracy = kCLLocationAccuracyBest;
[locationManager startUpdatingLocation];
}
- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error
{
NSLog(#"%#",error.userInfo);
if([CLLocationManager locationServicesEnabled]){
NSLog(#"Location Services Enabled");
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Need Your Location"
message:#"Please go to Settings and turn on Location Services so you can see who's near you."
delegate:nil
cancelButtonTitle:#"OK"
otherButtonTitles:nil];
[alert show];
}
}
- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
{
NSLog(#"didUpdateToLocation: %#", newLocation);
CLLocation *currentLocation = newLocation;
if (currentLocation != nil) {
_thisGeoPoint = [PFGeoPoint geoPointWithLatitude:currentLocation.coordinate.latitude
longitude:currentLocation.coordinate.longitude];
}
[locationManager stopUpdatingLocation];
located = true;
}
This is happening because locationManager stops running when it doesn't initially have permission. So you will need to re-run it once you detect that the permission has changed. You can check if the permission changed using the didChangeAuthorizationStatus delegate method.
So something like this:
- (void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status
{
if (status == kCLAuthorizationStatusAuthorized) {
[locationManager startUpdatingLocation];
}
}
I am using Core Location framework to getting location in iOS. I use, CLLocationManager *locationManager; and call [locationManager startUpdatingLocation];
Problem is I only need instantaneous location but startUpdatingLocation keep on giving me location. To stop this I can use [self.locationManager stopUpdatingLocation], but this look like a way out or hack.
Is there any better way to just get current location in iOS?
in your .h file
#import <CoreLocation/CoreLocation.h>
#interface LocationSearchViewController : UIViewController<UITextFieldDelegate,CLLocationManagerDelegate>
{
CLLocationManager *locationManager;
}
in your .m file
- (void)viewDidLoad
{
[super viewDidLoad];
locationManager = [[CLLocationManager alloc] init];
locationManager.delegate = self;
locationManager.desiredAccuracy = kCLLocationAccuracyBest;
[locationManager startUpdatingLocation];
}
#pragma mark - CLLocationManagerDelegate
- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error
{
NSLog(#"didFailWithError: %#", error);
UIAlertView *errorAlert = [[UIAlertView alloc]
initWithTitle:#"Error" message:#"Failed to Get Your Location" delegate:nil cancelButtonTitle:#"OK" otherButtonTitles:nil];
[errorAlert show];
}
- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
{
NSLog(#"didUpdateToLocation: %#", newLocation);
[locationManager stopUpdatingLocation]; // when u got the lat and long it stop uoatde the location
CLLocation *currentLocation = newLocation;
if (currentLocation != nil) {
NSString *getcurrlong = [NSString stringWithFormat:#"%.8f", currentLocation.coordinate.longitude];
NSSting *getcurrlat = [NSString stringWithFormat:#"%.8f", currentLocation.coordinate.latitude];
}
}
You can't think of location in those precise terms. You'll get back increasingly accurate locations from the location manager and it's up to you to decide when it's accurate enough. You have to weigh this against power usage and time. The location updates will never be completely accurate. The will never be returned immediately. The device has to power up hardware, then listen for GPS/WiFi/Cell signals and use all those to calculate location.
There's no way to ask for "my precise current location" and have it given to you immediately. Location is not a property like [NSDate date]. You can only ask for best-estimate location updates and they will only come to you in imprecise measurements, and never instantaneously (excepting cached location).
Check it
-(void)getCurrentLocation
{
locationManager = [[CLLocationManager alloc] init];
locationManager.desiredAccuracy = kCLLocationAccuracyBest;
locationManager.delegate = self;
[locationManager startUpdatingLocation];
startLocation = nil;
}
-(void)locationManager:(CLLocationManager *)manager
didUpdateToLocation:(CLLocation *)newLocation
fromLocation:(CLLocation *)oldLocation
{
if (startLocation == nil)
{
startLocation = newLocation;
[locationManager setDelegate:nil];
locationManager = nil;
}
}
I wrote an CLLocationManager ios app. However, I cannot see my app appears in the Location Services in the settings on my iPhone. Do I need to set a specific value in plist in my ios project in Xcode? Thanks in advance!
It should appear automatically once code that actually requires location tracking is being called (whenever the popup first show: do you allow...)
try calling something like this:
[self.locationManager startUpdatingLocation];
And that should do it
In iOS -8 need to do some changes :
locationManager = [[CLLocationManager alloc] init];
locationManager.delegate = self;
locationManager.desiredAccuracy = kCLLocationAccuracyBest;
if([locationManager respondsToSelector:#selector(requestWhenInUseAuthorization)]){
[locationManager requestWhenInUseAuthorization];
}else{
[locationManager startUpdatingLocation];
}
need to add 2 extra key in plist with blank value
1)NSLocationWhenInUseUsageDescription
2)NSLocationAlwaysUsageDescription
#pragma mark - CLLocationManagerDelegate
- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error
{
NSLog(#"didFailWithError: %#", error);
UIAlertView *errorAlert = [[UIAlertView alloc]
initWithTitle:#"Error" message:#"Failed to Get Your Location" delegate:nil cancelButtonTitle:#"OK" otherButtonTitles:nil];
[errorAlert show];
}
- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
{
NSLog(#"didUpdateToLocation: %#", newLocation);
CLLocation *currentLocation = newLocation;
if (currentLocation != nil) {
NSString *strLat = [NSString stringWithFormat:#"%.8f", currentLocation.coordinate.longitude];
NSString *strLong = [NSString stringWithFormat:#"%.8f", currentLocation.coordinate.latitude];
}
}