I am very new to objective C and Xcode. I was trying to find out the location of my iphone simulator and went through a tutorial on youtube. Following is the code.
#import "MainClassViewController.h"
#import <CoreLocation/CoreLocation.h>
#interface MainClassViewController () <CLLocationManagerDelegate>
#end
#implementation MainClassViewController
{
CLLocationManager *manager;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
manager = [[CLLocationManager alloc]init];
}
- (IBAction)LocationButton:(id)sender
{
manager.delegate = self;
manager.desiredAccuracy = kCLLocationAccuracyBest;
[manager startUpdatingLocation];
}
#pragma mark CLLocationManagerDelegate Methods
- (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 didUpdateLocations:(CLLocation *)newLocation fromLocation: (CLLocation *) oldLocation {
NSLog(#"Location: %#", newLocation);
CLLocation *currentLocation = newLocation;
if(currentLocation != nil){
_Lattitude.text = [NSString stringWithFormat:#"%.8f", currentLocation.coordinate.latitude];
_Longitude.text = [NSString stringWithFormat:#"%.8f", currentLocation.coordinate.longitude];
}
}
#end
#import <UIKit/UIKit.h>
#interface MainClassViewController : UIViewController
- (IBAction)LocationButton:(id)sender;
#property (weak, nonatomic) IBOutlet UILabel *Lattitude;
#property (weak, nonatomic) IBOutlet UILabel *Longitude;
#end
My questions are:
1. I am not sure why labels are not getting updated with location.
2. I want to learn more about debugging. Any suitable resources available. Please keep in mind I do not want learn all about debugging. Only what is required for the basics.
Related
This is my first post every here. Woohoo.
Here is my story ... I spent about a week trying tutorials about geofencing in IOS. The problem is that i have to do it in Objective-C for now.
I am trying to get a small app to run this geofencing but i keep having problems with the actual trigger events.
I am testing it on my actual phone (iPhone 7Plus) and i can't get to make some events show on the screen whether i'm inside the region or out.
i will paste code from the .h and .m files. these are the only ones that i have implemented so far.
#import <UIKit/UIKit.h>
#import <CoreLocation/CoreLocation.h>
#interface ViewController : UIViewController <CLLocationManagerDelegate>
#property (weak, nonatomic) IBOutlet UILabel *myLat;
#property (weak, nonatomic) IBOutlet UILabel *myLon;
#property (weak, nonatomic) IBOutlet UILabel *destLat;
#property (weak, nonatomic) IBOutlet UILabel *destLon;
#property (weak, nonatomic) IBOutlet UILabel *diff;
#property (weak, nonatomic) IBOutlet UILabel *answer;
#property BOOL alwaysOn;
#property BOOL isCLickOn;
#property (retain, nonatomic) CLLocationManager *locationManager;
#end
... and this what i have in my .m file:
#import "ViewController.h"
#interface ViewController ()
#end
#implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
- (void) viewDidAppear:(BOOL)animated{
// [self showAlertMessage:#"Test" message:#"Maybe works"];
// [self showAlertMessage:#"Test" message:#"Maybe works"];
[self setupTheAuthorizations];
if(!_isCLickOn){
[self startTheRegionMonitoring];
}
// _answer.text = #"Merge";
}
- (void) setupTheAuthorizations {
_locationManager = [[CLLocationManager alloc] init];
[_locationManager requestAlwaysAuthorization];
_locationManager.delegate = self;
[_locationManager startUpdatingLocation];
//check the type of authorization
CLAuthorizationStatus authStatus = [CLLocationManager authorizationStatus];
switch (authStatus) {
case kCLAuthorizationStatusAuthorizedAlways:
// should do somethinglike getting the things started and stuff like that ...
_alwaysOn = YES;
break;
case kCLAuthorizationStatusNotDetermined:
[_locationManager requestAlwaysAuthorization];
default:
break;
}
}
- (void) startTheRegionMonitoring {
if (_alwaysOn && [CLLocationManager isMonitoringAvailableForClass:[CLRegion class]]){
CLLocationDegrees latitude = 37.972004;
CLLocationDegrees longitude = -121.293740;
CLLocationDistance radius = 200;
CLLocationCoordinate2D center = CLLocationCoordinate2DMake(latitude, longitude);
CLCircularRegion *region = [[CLCircularRegion alloc] initWithCenter:center radius:radius identifier:#"CH"];
region.notifyOnEntry = YES;
region.notifyOnExit = YES;
_destLat.text = [NSString stringWithFormat:#"%f", latitude];
_destLon.text = [NSString stringWithFormat:#"%f", longitude];
_myLat.text = [NSString stringWithFormat:#"%f", _locationManager.location.coordinate.latitude];
_myLon.text = [NSString stringWithFormat:#"%f", _locationManager.location.coordinate.longitude];
[_locationManager startMonitoringForRegion:region];
}
_isCLickOn = YES;
}
- (void)locationManager:(CLLocationManager *)manager
didChangeAuthorizationStatus:(CLAuthorizationStatus)status {
}
- (void)locationManager:(CLLocationManager *)manager
didEnterRegion:(CLRegion *)region{
NSLog(#"entered region");
if ([region.identifier isEqualToString:#"CH"]){
_answer.text = #"IN";
CLLocation *me = [[CLLocation alloc] initWithLatitude:_locationManager.location.coordinate.latitude
longitude:_locationManager.location.coordinate.longitude];
CLLocation *dest = [[CLLocation alloc] initWithLatitude:37.972004
longitude:-121.293740];
int dist = [me distanceFromLocation:dest];
_diff.text = [NSString stringWithFormat:#"%i", dist];
}
}
- (void)locationManager:(CLLocationManager *)manager
didExitRegion:(CLRegion *)region{
NSLog(#"entered region");
if ([region.identifier isEqualToString:#"CH"]) {
_answer.text = #"OUT";
CLLocation *me = [[CLLocation alloc] initWithLatitude:_locationManager.location.coordinate.latitude
longitude:_locationManager.location.coordinate.longitude];
CLLocation *dest = [[CLLocation alloc] initWithLatitude:37.972004
longitude:-121.293740];
int dist = [me distanceFromLocation:dest];
_diff.text = [NSString stringWithFormat:#"%i", dist];
}
}
- (void)locationManager:(CLLocationManager *)manager
didStartMonitoringForRegion:(CLRegion *)region __OSX_AVAILABLE_STARTING(__MAC_10_8,__IPHONE_5_0) __TVOS_PROHIBITED __WATCHOS_PROHIBITED{
NSLog(#"Monitoring started");
}
- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error{
NSLog(#"error");
}
- (void) showAlertMessage:(NSString *)title message:(NSString *)message {
UIAlertController *alert = [UIAlertController alertControllerWithTitle:title message:message preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction *cancel = [UIAlertAction actionWithTitle:#"Cancel" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
[self dismissViewControllerAnimated:YES completion:nil];
}];
[alert addAction:cancel];
[self presentViewController:alert animated:YES completion:nil];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#end
What happens is that i don't get any events showing on my phone even when the app is open. so I have a view controller on the storyboard that is supposed to show my location and destination location and to show the distance between the two objects. But it doesn't show it even if i walk 400 meters and then i walk back to the center.
I know that Swift is what I should use, and I will switch to Swift but for right now I am really wanting to understand the process that goes in this geofencing thing.
Any help will be appreciated. I am also pretty new at programming so I still have things that I am trying to learn and understand about Objective-C in particular.
Thank you.
hey friends i will implement the code to get current address.but problem is i will not get perfect location but provide some some another near location so pls solve my problem
map.h
#import <UIKit/UIKit.h>
#import <CoreLocation/CoreLocation.h>
#interface ViewController : UIViewController<CLLocationManagerDelegate>
#property (weak, nonatomic) IBOutlet UILabel *lbl_lat;
#property (weak, nonatomic) IBOutlet UILabel *lbl_long;
#property (weak, nonatomic) IBOutlet UILabel *lbl_address;
- (IBAction)location:(id)sender;
#end
map.m
#import "ViewController.h"
#interface ViewController ()
#end
#implementation ViewController
{
CLLocationManager *locationManager;
CLGeocoder *geocoder;
CLPlacemark *placemark;
}
- (void)viewDidLoad {
[super viewDidLoad];
locationManager = [[CLLocationManager alloc] init];
geocoder = [[CLGeocoder alloc] init];
// Do any additional setup after loading the view, typically from a nib.
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (IBAction)location:(id)sender {
locationManager.delegate = self;
locationManager.desiredAccuracy = kCLLocationAccuracyKilometer;
locationManager.distanceFilter = 500;
[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) {
self.lbl_long.text = [NSString stringWithFormat:#"%.8f", currentLocation.coordinate.longitude];
self.lbl_lat.text = [NSString stringWithFormat:#"%.8f", currentLocation.coordinate.latitude];
}
// Reverse Geocoding
NSLog(#"Resolving the Address");
[geocoder reverseGeocodeLocation:currentLocation completionHandler:^(NSArray *placemarks, NSError *error) {
NSLog(#"Found placemarks: %#, error: %#", placemarks, error);
if (error == nil && [placemarks count] > 0) {
placemark = [placemarks lastObject];
self.lbl_address.text = [NSString stringWithFormat:#"%# %#\n%# %#\n%#\n%#",
placemark.subThoroughfare, placemark.thoroughfare,
placemark.postalCode, placemark.locality,
placemark.administrativeArea,
placemark.country];
} else {
NSLog(#"%#", error.debugDescription);
}
} ];
}
thanks for in advance
Can you set desiredAccuracy to kCLLocationAccuracyBest instead of kCLLocationAccuracyKilometer.
locationManager.desiredAccuracy = kCLLocationAccuracyBest;
kCLLocationAccuracyBest sets accuracy to the highest-level of accuracy. By using kCLLocationAccuracyKilometer you set accuracy to the nearest kilometre, thus you are not getting exact location.
I am trying to make a simple app the will get the users longitude and latitude
I followed the tutorial here:
http://www.appcoda.com/how-to-get-current-location-iphone-user/
and came with this:
.h
#import <UIKit/UIKit.h>
#import <CoreLocation/CoreLocation.h>
#interface ViewController : UIViewController <CLLocationManagerDelegate>
#property (strong, nonatomic) IBOutlet UILabel *longitudeLabel;
#property (strong, nonatomic) IBOutlet UILabel *latitudeLabel;
- (IBAction)getCurrentLocation:(id)sender;
#end
.m
#import "ViewController.h"
#interface ViewController ()
#end
#implementation ViewController
{
CLLocationManager *locationManager;
}
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
locationManager = [[CLLocationManager alloc] init];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (IBAction)getCurrentLocation:(id)sender {
locationManager.delegate = self;
locationManager.desiredAccuracy = kCLLocationAccuracyBest;
[locationManager startUpdatingLocation];
}
#pragma mark - CLLocationManagerDelegate
- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error
{
NSLog(#"didFailWithError: %#", error);
}
- (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];
}
}
#end
My issue is that "Would like to use your current location" popup.
and none of the delegate methods are being hit, at all. I put a break point at the beginning of each delegate method and nothing. Please help.
Please ensure you have following keys in your info.plist:
NSLocationAlwaysUsageDescription with value I need Location
NSLocationWhenInUseUsageDescription with value I need Location
privacy - location usage description with value I need Location
Ensure the info.plist details as answered earlier and then add the below code during your initialization;
if (IS_OS_8_OR_LATER) {
[locationmanager requestWhenInUseAuthorization];
//or (as per your app requirement)
[locationmanager requestAlwaysAuthorization];
}
I've followed online tutorials from AppCoda and Devfright to create an iBeacon detection app. I'm using an iBeacon from estimote, an iPad 3 with iOS 8. The app simply does not detect my iBeacon whereas its being detected by other iBeacon apps. I can't understand what I'm missing or doing wrong in my code.
Here's my .h file:
#import <UIKit/UIKit.h>
#import <CoreLocation/CoreLocation.h>
#interface ViewController : UIViewController<CLLocationManagerDelegate>
#property (nonatomic, strong) CLBeaconRegion *beaconRegion;
#property (nonatomic, strong) CLLocationManager *locManager;
#property (nonatomic, strong) IBOutlet UILabel *label1;
#property (nonatomic, strong) IBOutlet UILabel *label2;
#end
Here's my .m file:
#import "ViewController.h"
#import <CoreLocation/CoreLocation.h>
#interface ViewController () <CLLocationManagerDelegate>
#end
#implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
self.locManager = [[CLLocationManager alloc] init];
self.locManager.delegate = self;
//default uuid for estimote beacons
NSUUID *uuid = [[NSUUID alloc] initWithUUIDString:#"B9407F30-F5F8-466E-AFF9-25556B57FE6D"];
self.beaconRegion = [[CLBeaconRegion alloc]initWithProximityUUID:uuid identifier:#"com.rk.testregion"];
[self.locManager startMonitoringForRegion:self.beaconRegion];
[self locationManager:self.locManager didStartMonitoringForRegion:self.beaconRegion];
// Check if beacon monitoring is available for this device
if (![CLLocationManager isMonitoringAvailableForClass:[CLBeaconRegion class]]) {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Monitoring not available" message:nil delegate:nil cancelButtonTitle:#"Ok" otherButtonTitles: nil]; [alert show]; return;
}
}
-(void)locationManager:(CLLocationManager*)manager didRangeBeacons:(NSArray*)beacons inRegion:(CLBeaconRegion*)region
{
// Beacon found!
self.label1.text = #"Welcome to";
self.label2.text = #"Location 1";
CLBeacon *foundBeacon = [beacons firstObject];
// retrieve the beacon data from its properties
NSString *uuid = foundBeacon.proximityUUID.UUIDString;
NSString *major = [NSString stringWithFormat:#"%#", foundBeacon.major];
NSString *minor = [NSString stringWithFormat:#"%#", foundBeacon.minor];
NSLog(#"UUID: %#", uuid);
NSLog(#"major: %#", major);
NSLog(#"minor: %#", minor);
}
- (void)viewDidDisappear:(BOOL)animated
{
[self.locManager stopRangingBeaconsInRegion:self.beaconRegion];
[super viewDidDisappear:animated];
}
- (void)locationManager:(CLLocationManager*)manager didEnterRegion:(CLRegion*)region
{
[self.locManager startRangingBeaconsInRegion:self.beaconRegion];
}
-(void)locationManager:(CLLocationManager*)manager didExitRegion:(CLRegion*)region
{
[self.locManager stopRangingBeaconsInRegion:self.beaconRegion];
self.label1.text = #"Searching again...";
}
- (void)locationManager:(CLLocationManager *)manager didStartMonitoringForRegion:(CLRegion *)region {
[self.locManager startRangingBeaconsInRegion:self.beaconRegion];
}
#end
The delegate method didRangeBeacons simply does not get called. Could someone please let me know how to fix this.
Check out the answer below, which describes some extra hoops you now need to jump through to get this working:
Location Services not working in iOS 8
Full disclosure: I have not tried this myself.
I was trying to implement a separate class for managing my location. I wanted to get my location whenever I click a button.
gpsFilter.h
#import <Foundation/Foundation.h>
#import <CoreLocation/CoreLocation.h>
#interface gpsFilter : NSObject <CLLocationManagerDelegate>
#property (nonatomic, retain) CLLocationManager *gpsManager;
#property (nonatomic, retain) NSString * latitude;
#property (nonatomic, retain) NSString * longitude;
#end
gpsFilter.m.
#import "gpsFilter.h"
#implementation gpsFilter
- (id) init{
self = [super init];
if(self != nil){
self.gpsManager = [[CLLocationManager alloc] init];
self.gpsManager.delegate = self;
[self.gpsManager startUpdatingLocation];
BOOL enable = [CLLocationManager locationServicesEnabled];
NSLog(#"%#", enable? #"Enabled" : #"Not Enabled");
}
return self;
}
- (void)gpsManager:(CLLocationManager *) manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation{
NSLog(#"didUpdateToLocation: %#", newLocation);
CLLocation *currentLocation = newLocation;
if(currentLocation != nil){
self.latitude = [NSString stringWithFormat:#"%.8f", currentLocation.coordinate.longitude];
self.longitude = [NSString stringWithFormat:#"%.8f", currentLocation.coordinate.latitude];
}
}
- (void)gpsManager:(CLLocationManager *)manager didFailWithError:(NSError *)error
{
NSLog(#"didFailWithError: %#", error);
}
#end
I am using a separate class because I wanted to add smoothing filter in the future. I don't get any updates. The NSLog is never triggered. I think some variable is getting autoreleased, but I am not sure, which one.
The viewController code is as follows.
#import "gpstestViewController.h"
#interface gpstestViewController (){
}
#end
#implementation gpstestViewController
- (void)viewDidLoad
{
[super viewDidLoad];
self.location = [[gpsFilter alloc] init];
// Do any additional setup after loading the view, typically from a nib.
}
- (IBAction)getloca:(id)sender {
self.latitudeLabel.text = [self.location latitude];
self.longitudeLabel.text = [self.location longitude];
}
- (IBAction)getLocation:(id)sender {
self.latitudeLabel.text = [self.location latitude];
self.longitudeLabel.text = [self.location longitude];
}
#end
I am sorry that I am dumping a lot of code, but I am a newbie to ios programming and I am not able to find what the problem is.
EDIT: The updateLocation delegate method is not being called at all.
The delegate methods must be named locationManager:didUpdateToLocation:fromLocation: and locationManager:didFailWithError:.
You cannot use custom method names like gpsManager:didUpdateToLocation:fromLocation:.
Also note that locationManager:didUpdateToLocation:fromLocation: is deprecated as of iOS 6 and you should use locationManager:didUpdateLocations:.
The signature of your didUpdateToLocation is wrong:
This is my code:
/** Delegate method from the CLLocationManagerDelegate protocol. */
- (void)locationManager:(CLLocationManager *)manager
didUpdateToLocation:(CLLocation *)newLocation
fromLocation:(CLLocation *)oldLocation
{
// here do
}
Further set the desiredAccuracy to CLLocationAccuracyBest.