beacon array value is empty in didRangeBeacons in objective C - objective-c

Question

in my app i'm finding the beacons & want to calculate the Distance,here two days i struck with one problem that is in CCLocationManager delegate function returns empty beacons array.i tried the CBCentralManagerDelegate functions i get the list of beacons.in the didRangeBeacons method gives empty array help me. below is my code i tried
Code:
#interface ViewController ()<CBCentralManagerDelegate,CLLocationManagerDelegate>
{
NSMutableData *dat;
CLBeaconRegion *clBeconRegion;
CLLocationManager *locManager;
}
#property (strong,nonatomic) CBCentralManager *cbcManager;
- (IBAction)scanBtn:(id)sender;
#end
#implementation ViewController
- (void)viewDidLoad{
[super viewDidLoad];
self.cbcManager=[[CBCentralManager alloc] initWithDelegate:self queue:nil];
locManager=[[CLLocationManager alloc] init];
locManager.delegate=self;
[self initRegion];
clBeconRegion.notifyEntryStateOnDisplay=YES;
[locManager requestAlwaysAuthorization];
[self locationManager:locManager didStartMonitoringForRegion:clBeconRegion];
}
-(void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary *)advertisementData RSSI:(NSNumber *)RSSI
{
NSLog(#"List of peripheral %#",peripheral);
NSLog(#"List of advertisementData %# %#",advertisementData,RSSI);
}
-(void)initRegion{
NSUUID *uuid=[[NSUUID alloc]initWithUUIDString:#"XXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX"];
clBeconRegion=[[CLBeaconRegion alloc]initWithProximityUUID:uuid identifier:#"BluetoothExample"];
clBeconRegion.notifyEntryStateOnDisplay=YES;
clBeconRegion.notifyOnEntry=YES;
clBeconRegion.notifyOnExit=YES;
[locManager startMonitoringForRegion:clBeconRegion];
}
-(void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)peripheral
{
NSLog(#"didConnectPeripheral");
[peripheral discoverServices:nil];
}
-(void)locationManager:(CLLocationManager *)manager didStartMonitoringForRegion:(CLRegion *)region{
[locManager startRangingBeaconsInRegion:clBeconRegion];
}
-(void)locationManager:(CLLocationManager *)manager didEnterRegion:(CLRegion *)region{
NSLog(#"Entered Region");
[locManager startRangingBeaconsInRegion:clBeconRegion];
}
-(void)locationManager:(CLLocationManager *)manager didExitRegion:(CLRegion *)region{
NSLog(#"Exit Region");
[locManager stopRangingBeaconsInRegion:clBeconRegion];
}
-(void)locationManager:(CLLocationManager *)manager didRangeBeacons:(NSArray *)beacons inRegion:(CLBeaconRegion *)region{
NSLog(#"beacons %# last %#",beacons,[region proximityUUID]);
CLBeacon *beacon=[[CLBeacon alloc]init];
beacon=[beacons lastObject];
NSLog(#"min %# maj %#",beacon.minor,beacon.major);
}
- (IBAction)scanBtn:(id)sender
{
NSDictionary *options = [NSDictionary dictionaryWithObjectsAndKeys:[NSNumber numberWithBool:NO], CBCentralManagerScanOptionAllowDuplicatesKey, nil];
[self.cbcManager scanForPeripheralsWithServices:nil options:options];
NSLog(#"scan clicked");
}
i'd fixed the NSLocationAlwaysUsageDescription info.plist.
i have a real beacon & ipad mini device.
this code is given in all beacon finding examples.help me what i did a mistake here.

Answer 1

A few points:
If you are not getting ranging callbacks, the ProximityUUID may be incorrect. Use an off the shelf beacon detector like Locate and verify you can detect the beacon and the ProximityUUID is what the CLBeaconRegion is set up to detect.
Verify you have obtained location permissions properly by going to Settings -> (your app name), and verifying Location is set to "always"
There is no need to use CoreBluetooth when detecting iBeacons. You should remove all lines with classes that have the CB prefix. While this code will give you a list of iBeacon Bluetooth devices nearby, it will not let you read the beacon identifiers. You must use CoreLocation to do that.
This method call is made by the CoreLocation framework, and should not be called manually. It should be removed:
[self locationManager:locManagerdidStartMonitoringForRegion:clBeconRegion];