位置管理器在 iOS8 中不起作用

Question

Please don't mark it as duplicate because I took help from others posted answer in stack overflow. But still I faced some issues. Location manager delegate not get called even in real device also. And also it's not asking for the permission.

Below is my code.

- (IBAction)getUserLocationAction:(id)sender
{
    if([CLLocationManager locationServicesEnabled])
    {
        if(!locationManager)
            locationManager = [[CLLocationManager alloc] init];

        [locationManager setDelegate:self];
        [locationManager setDesiredAccuracy:kCLLocationAccuracyBest];

        if ([locationManager respondsToSelector:@selector(requestWhenInUseAuthorization)]) {
            [locationManager requestWhenInUseAuthorization];
        }

        [locationManager startUpdatingLocation];
        //[locationManager startMonitoringSignificantLocationChanges];
    }
    else
    {
        NSLog(@"Location service is not enabled");
    }
}


#pragma mark - Location Manager Delegate- 

- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
{
    NSLog(@"%@", locations);
    userLocation = [locations lastObject];
    NSLog(@"User Current Locatiion\nLat: %+.6f\nLong: %+.6f", [userLocation coordinate].latitude, [userLocation coordinate].longitude);

   [locationManager stopUpdatingLocation];
   //[locationManager stopMonitoringSignificantLocationChanges];
}



- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error
{
    NSLog(@"Error: %@", [error localizedDescription]);
}

I also add the below two key in my .plist file

<key>NSLocationWhenInUseUsageDescription</key>
<string>This app want to use your location</string>
<key>NSLocationAlwaysUsageDescription</key>
<string>This app want to use your location</string>

I have also added the frameworks

I am not sure where I am doing wrong. Please help me.

UPDATE

Firstly I think its an issue with my code but after some research it's working as expected in iOS7. The code is remain same, this issue occur only in iOS8. Please let me know what changes needs to be done for working in iOS8 also.

Answer 1

You need to do some more checking:

- (IBAction)getUserLocationAction:(id)sender
{
    if([CLLocationManager locationServicesEnabled]) {

        if(!self.locationManager) {
            self.locationManager = [[CLLocationManager alloc] init];
            [self.locationManager setDelegate:self];
            [self.locationManager setDesiredAccuracy:kCLLocationAccuracyBest];
        }

        CLAuthorizationStatus authStatus = [CLLocationManager authorizationStatus];
        if (authStatus == kCLAuthorizationStatusNotDetermined) {
            // Check for iOS 8 method
            if ([self.locationManager respondsToSelector:@selector(requestWhenInUseAuthorization)]) {
                [self.locationManager requestWhenInUseAuthorization];
            }
            else {
                [self.locationManager startUpdatingLocation];
            }
        }
        else if(authStatus == kCLAuthorizationStatusAuthorizedAlways || authStatus == kCLAuthorizationStatusAuthorizedWhenInUse || authStatus == kCLAuthorizationStatusAuthorized) {
            [self.locationManager startUpdatingLocation];
        }
        else if(authStatus == kCLAuthorizationStatusDenied){
            NSLog(@"User did not allow location tracking.");
            // present some dialog that you want the location.
        }
        else {
            // kCLAuthorizationStatusRestricted
            // restriction on the device do not allow location tracking.
        }
    }
    else {
        NSLog(@"Location service is not enabled");
    }
}

Also you need to handle the use callback:

- (void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status {
    if (status != kCLAuthorizationStatusRestricted &&  status !=kCLAuthorizationStatusDenied) {
        [self.locationManager startUpdatingLocation];
    }
}

Answer 2

检查您的位置访问设置..所以转到设置-->隐私-->定位服务-->您的应用