//In view did load...
self.locationManager = [[CLLocationManager alloc] init];
self.locationManager.delegate = self;
self.locationManager.distanceFilter = kCLHeadingFilterNone;// kCLHeadingFilterNone;
self.locationManager.desiredAccuracy = kCLLocationAccuracyBestForNavigation;
- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
{
if (newLocation.course >= 0)
{
[NSThread detachNewThreadSelector:#selector(showAlertsIfNeededThread) toTarget:self withObject:nil];
}
}
- (void) showAlertsIfNeededThread
{
#autoreleasepool
{
NSLog(#"Thread started........");
[NSThread sleepForTimeInterval:3.0];
//[self showAlertsIfNeeded];
[self performSelectorOnMainThread:#selector(showAlertsIfNeeded) withObject:nil waitUntilDone:NO];
}
}
After some executions threads are not executing. App is hanging.
Can any one help me out.
Thanks in advance.
Related
I am calling CLLocationManager and it's calling its delegate method as well. But my problem is, isn't updating its New Location after traveling 1 km.
Here's my code:
locationManager = [[CLLocationManager alloc] init];
locationManager.delegate = self;
locationTimer=[NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:#selector(updateLocation1:) userInfo:nil repeats:YES];
locationManager.distanceFilter = kCLDistanceFilterNone;
locationManager.desiredAccuracy = kCLLocationAccuracyBestForNavigation;
// Method did update location - Update location when location change
-(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
{
// this method is calling after every 1 sec interval time..
}
-(void)locationManager:(CLLocationManager *)manager
didUpdateToLocation:(CLLocation *)newLocation
fromLocation:(CLLocation *)oldLocation
{
// this method is not calling once also after travelling around a km ....
}
What am I doing wrong?
You should be calling startUpdatingLocation or startMonitoringSignificantLocationChanges on the location manager for it to start checking for location changes and calling your delegate methods.
locationManager:didUpdateToLocation:fromLocation: is deprecated so you can expect it not to always be used.
If locationManager:didUpdateLocations: is being called then you are receiving location updates.
- (void)viewDidLoad
{
CLLocationManager *locationManager = [[CLLocationManager alloc] init];
locationManager.delegate = self;
locationManager.desiredAccuracy = kCLLocationAccuracyBest;
locationManager.distanceFilter = kCLLocationAccuracyKilometer;
[locationManager startUpdatingLocation];
CLLocation *location = [locationManager location];
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
}
- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
{
//[manager stopUpdatingLocation];
CLLocationCoordinate2D coordinate_currentlocation = [newLocation coordinate];
float latitude_current = newLocation.coordinate.latitude;
float longitude_current = newLocation.coordinate.longitude;
}
Your first method
- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
{
// this method is calling after every 1 sec interval time..
}
is used since iOS 6.
The second one is deprecated since iOS 6 and was used prior to iOS 6. You can use both methods, depending on the system version on the device your app is running at, by adding a helper method.
- (void) locationManager:(CLLocationManager *) manager didUpdateToLocation:(CLLocation *) newLocation fromLocation:(CLLocation *) oldLocation
{
[self locationManager:manager helperForLocation:newLocation];
}
- (void) locationManager:(CLLocationManager *) manager didUpdateLocations:(NSArray *) locations
{
if([locations count] > 0)
{
[self locationManager:manager helperForLocation:[locations objectAtIndex:[locations count] - 1]];
}
}
- (void) locationManager:(CLLocationManager *) manager helperForLocation:(CLLocation *) newLocation
{
// your code what to do with location goes here
}
The locations retrieved by iOS 6 are wrapped in a list and could be more than 1. In my example I take the last one and put it to my helper.
i have done this within my app with the use of this
myLocationManager = [[CLLocationManager alloc] init];
myLocationManager.delegate = self;
myLocationManager.desiredAccuracy = kCLLocationAccuracyBest;
[myLocationManager startUpdatingLocation];
- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error
{
NSLog(#"didFailWithError: %#", error);
UIAlertView *errorAlert = [[UIAlertView alloc]
initWithTitle:#"Error" message:#"Failed to Get Your Location, Please turn on GPS and Restart The Application"delegate:nil cancelButtonTitle:#"OK" otherButtonTitles:nil];
[errorAlert show];
[errorAlert release];
}
-(void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
{
CLLocation *currentLocation = newLocation;
if (currentLocation != nil) {
[NSString stringWithFormat:#"%.8f", currentLocation.coordinate.longitude];
[NSString stringWithFormat:#"%.8f", currentLocation.coordinate.latitude];
}
// Stop Location Manager
[myLocationManager stopUpdatingLocation];
}
-(void)postCurrentLocationOfDevice
{
self.locationManager = [[CLLocationManager alloc] init];
self.locationManager.distanceFilter = kCLDistanceFilterNone;
self.locationManager.desiredAccuracy = kCLLocationAccuracyBest;
[self.locationManager startUpdatingLocation];
self.locationManager.delegate = self;
}
-(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
{
CURRENT_LOCATION = [locations objectAtIndex:0];
[self.locationManager stopUpdatingLocation];
}
-(void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
{
CURRENT_LOCATION = newLocation;
[self.locationManager stopUpdatingLocation];
}
in .h file
#import <MapKit/MapKit.h>
#interface FirstViewController : UIViewController <MKMapViewDelegate,MKReverseGeocoderDelegate,CLLocationManagerDelegate>
{
}
in .m file
-(void)viewDidLoad
{
CLLocationManager *locationManager = [[[CLLocationManager alloc] init] autorelease];
locationManager.delegate = self;
locationManager.distanceFilter = kCLDistanceFilterNone;
locationManager.desiredAccuracy = kCLLocationAccuracyBest;
[locationManager startUpdatingLocation];
[super viewDidLoad];
}
- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
{
MKReverseGeocoder *geoCoder = [[MKReverseGeocoder alloc] initWithCoordinate:newLocation.coordinate];
geoCoder.delegate = self;
[geoCoder start];
}
- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error
{
NSLog(#"locationManager:%# didFailWithError:%#", manager, error);
}
- (void)reverseGeocoder:(MKReverseGeocoder *)geocoder didFindPlacemark:(MKPlacemark *)placemark
{
MKPlacemark * myPlacemark = placemark;
NSString *kABPersonAddressCityKey;
NSString *city = [myPlacemark.addressDictionary objectForKey:(NSString*) kABPersonAddressCityKey];
lblAddress.text = city;
NSLog(#"city detail is:--> %#",city);
}
- (void)reverseGeocoder:(MKReverseGeocoder *)geocoder didFailWithError:(NSError *)error
{
NSLog(#"reverseGeocoder:%# didFailWithError:%#", geocoder, error);
}
This is the code which I have done to get the current location of user & print it in the label.
But the CLLocationManager delegate method (which are written above) is not called & I am not able to get the current address.
Please help me out.
Where I am doing mistake...? guide me.
Thanks.
Instead of autoreleasing the CLLocationManager instance, assign it to an ivar in your class. Then release it in -dealloc as usual (or in one of the delegate methods if you don't need it any longer).
I suspect your location manager is getting deallocated on the next turn of the run loop before having an opportunity to fire off its delegate methods.
In your method viewDidLoad:
-(void)viewDidLoad
{
CLLocationManager *locationManager = [[[CLLocationManager alloc] init] autorelease];
locationManager.delegate = self;
locationManager.distanceFilter = kCLDistanceFilterNone;
locationManager.desiredAccuracy = kCLLocationAccuracyBest;
[locationManager startUpdatingLocation];
myMapView.showsUserLocation = YES; // add this line
[super viewDidLoad];
}
And you are done!!!
My location manager is not updating my coordinates of current locations so that i cant able to trace that address.......
I am using the following code,
- (void)viewDidLoad
{
[super viewDidLoad];
locationManager = [[CLLocationManager alloc] init];
//locationManager.desiredAccuracy = kCLLocationAccuracyBest;
locationManager.delegate = self;
[locationManager startUpdatingLocation];
// startLocation = nil;
[super viewDidLoad];
}
-(void)locationManager:(CLLocationManager *)manager
didUpdateToLocation:(CLLocation *)newLocation
fromLocation:(CLLocation *)oldLocation
{
NSLog(#"Latitude:%f Longitude:%f", newLocation.coordinate.latitude, newLocation.coordinate.longitude);
geocoder =[[[MKReverseGeocoder alloc] initWithCoordinate:newLocation.coordinate]autorelease];
geocoder.delegate=self;
[geocoder start];
}
-(void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error
{
NSLog(#"%#Error",[error description]);
}
- (void)reverseGeocoder:(MKReverseGeocoder *)geocoder didFindPlacemark:(MKPlacemark *)placemark{
NSString *street=[placemark.addressDictionary objectForKey:#"Street"];
NSLog(#"%#",street);
}
It shows the error report
Error Domain=kCLErrorDomain Code=0 "The operation couldnft be completed. (kCLErrorDomain error 0.)"Error
How to overcome this?.
Hey guys,
I'm trying to call the update method but its not working, any idea?
#import "TrackerViewController.h"
#implementation TrackerViewController
-(IBAction)updateButton:(id)sender{
[self update];
}
-(void)update{
locmanager = [[CLLocationManager alloc] init];
[locmanager setDelegate:self];
[locmanager setDesiredAccuracy:kCLLocationAccuracyBest];
[locmanager startUpdatingLocation];
}
-(void)viewDidLoad {
[self update];
}
- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
{
CLLocationCoordinate2D loc = [newLocation coordinate];
latitude.text = [NSString stringWithFormat: #"%f", loc.latitude];
longtitude.text = [NSString stringWithFormat: #"%f", loc.longitude];
}
- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error
{
}
The didUpdateToLocation will be called when an location changes.
I guess you are testing it in simulator and on simulator no change occurs in location so the method don't called.
Suggesstion You should implement other delegate methods to check whats happening; in case if there is some error. For example: locationManager:didFailWithError:
Below is my code but its not working. Can anyone help me???
- (void)viewDidLoad {
[super viewDidLoad];
CLController = [[CoreLocationController alloc] init];
CLController.delegate = self;
//[CLController setDesiredAccuracy:kCLLocationAccuracyBest];
[CLController.locMgr startUpdatingLocation];
}
- (void)locationUpdate:(CLLocation *)location {
locLabel.text = [location description];
}
- (void)locationError:(NSError *)error {
locLabel.text = [error description];
}
You aren't doing the CLocationManager delegate methods properly
(void)locationUpdate:(CLLocation *)location {
locLabel.text = [location description];
}
Should be
- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation{
locLabel.text = [newLocation description];
}
You should read Apple's documentation http://developer.apple.com/library/ios/#documentation/CoreLocation/Reference/CLLocationManagerDelegate_Protocol/CLLocationManagerDelegate/CLLocationManagerDelegate.html%23//apple_ref/doc/uid/TP40007124 about this thoroughly before implementing it.