Hello , my code was working perfectly , i used it on many apps.
Today my apps dont works.
The delegate didRangeBeacons in Region never called.
Here is my code please help me . i have to show that app today.
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#import "ESTViewController.h"
#import "PresentViewController.h"
#import <ESTBeaconManager.h>
#import <Parse/Parse.h>
#import <AudioToolbox/AudioToolbox.h>
@interface ESTViewController () <ESTBeaconManagerDelegate>
@property (nonatomic, strong) ESTBeaconManager* beaconManager;
@property (nonatomic, strong) ESTBeacon* selectedBeacon;
@property (nonatomic, strong) NSArray *beaconsArray;
@end
@implementation ESTViewController
- 
(void)viewDidLoad 
 {
 [super viewDidLoad];// setup Estimote beacon manager. // Create the manager instance. 
 self.beaconManager = [[ESTBeaconManager alloc] init];
 // Setup the delegate
 self.beaconManager.delegate = self;
 // Avoiding unknown state or not
 self.beaconManager.avoidUnknownStateBeacons = NO;
 // create sample region object (beacons in this case have all same uuid and same major)
 region = [[ESTBeaconRegion alloc] initWithProximityUUID:ESTIMOTEPROXIMITYUUID identifier:@"multibeacons"];[self.beaconManager requestStateForRegion:region]; 
}
- (void)viewWillAppear:(BOOL)animated 
 {
 [super viewWillAppear:animated];
 }
- 
(void)viewDidAppear:(BOOL)animated 
 {
 [super viewDidAppear:animated];// start looking for estimote beacons in region 
 // when beacon ranged beaconManager:didRangeBeacons:inRegion: invoked
 [self.beaconManager startRangingBeaconsInRegion:region];
 [self.beaconManager startMonitoringForRegion:region];
 }
- (void)viewWillDisappear:(BOOL)animated 
 {
 [super viewWillDisappear:animated];
 }
- 
(void)viewDidDisappear:(BOOL)animated 
 {
 [super viewDidDisappear:animated];// stop looking for estimote beacons in region 
 [self.beaconManager stopRangingBeaconsInRegion:region];
 [self.beaconManager stopMonitoringForRegion:region];
}
- (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. }
#pragma mark - ESTBeaconManager delegate
-(void)beaconManager:(ESTBeaconManager *)manager
     didRangeBeacons:(NSArray *)beacons
            inRegion:(ESTBeaconRegion *)region
{
    // descriptor on distance to sort the array of beacons by distance
    NSSortDescriptor *sortDescriptor;
    sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"distance" ascending:YES];
    NSArray *sortDescriptors = [NSArray arrayWithObject:sortDescriptor];
// sorting the array of beacons
// beacon array is sorted based on distance
// closest beacon is the first one
self.beaconsArray = [beacons sortedArrayUsingDescriptors:sortDescriptors];
if([self.beaconsArray count] > 0)
{
    if(!self.selectedBeacon)
    {
        // initialy pick closest beacon
        self.selectedBeacon = [beacons objectAtIndex:0];
        currentBeaconMinor = self.selectedBeacon.minor;
    }
    else
    {
        //sorting the array of beacons
       self.beaconsArray = [beacons sortedArrayUsingDescriptors:sortDescriptors];
       //updating the selected beacon with the first element of the array (closest beacon)
       if(self.selectedBeacon != [beacons objectAtIndex:0] )
        {
            self.selectedBeacon = [beacons objectAtIndex:0];
            currentBeaconMinor = self.selectedBeacon.minor;
        }
    }
    // Switch on proximity of the closest beacon
    switch (self.selectedBeacon.proximity)
    {
        case CLProximityUnknown:
        {
            self.rangeStatusImageView.image = [UIImage imageNamed:@"lost.jpg"];
            self.rangeStatusImageView.hidden = NO;
            self.signalStatusImageView.hidden = YES;
            self.descriptionStateLabel.text = @"Recherche de signal ... Si le problème persiste, contactez l'accueil";
            [UIView animateWithDuration:1.0
                                  delay: 0.0
                                options: UIViewAnimationOptionCurveEaseIn
                             animations:^{
                                 self.rangeStatusImageView.alpha = 0.3;
                             }
                             completion:^(BOOL finished){
                                 [UIView animateWithDuration:1.0
                                                       delay: 0.0
                                                     options:UIViewAnimationOptionCurveEaseOut
                                                  animations:^{
                                                      self.rangeStatusImageView.alpha = 1.0;
                                                  }
                                                  completion:nil];
                             }];
            break;
        }
        case CLProximityImmediate:
        {
            if ([currentBeaconMinor floatValue] == 128)
            {
                NSLog(@"128 128 128");
                [self performSegueWithIdentifier: @"presentSegue1" sender: self];
            }
            else if ([currentBeaconMinor floatValue] == 228)
            {
                NSLog(@"228 228 228");
                [self performSegueWithIdentifier: @"presentSegue2" sender: self];
            }
            else if ([currentBeaconMinor floatValue] == 328)
            {
                NSLog(@"328 328 328");
                [self performSegueWithIdentifier: @"presentSegue3" sender: self];
            }
            break;
        }
        case CLProximityNear:
        {
            self.rangeStatusImageView.image = [UIImage imageNamed:@"near.jpg"];
            self.signalStatusImageView.hidden = NO;
            AudioServicesPlayAlertSound(kSystemSoundID_Vibrate);
            [UIView animateWithDuration:1.0
                                  delay: 0.0
                                options: UIViewAnimationOptionCurveEaseIn
                             animations:^{
                                 self.rangeStatusImageView.alpha = 0.3;
                             }
                             completion:^(BOOL finished){
                                 [UIView animateWithDuration:1.0
                                                       delay: 0.0
                                                     options:UIViewAnimationOptionCurveEaseOut
                                                  animations:^{
                                                      self.rangeStatusImageView.alpha = 1.0;
                                                  }
                                                  completion:nil];
                             }];
            self.rangeStatusImageView.hidden = NO;
            self.descriptionStateLabel.font = [UIFont systemFontOfSize:17];
            self.descriptionStateLabel.text = @"Approchez vous d'un article pour obtenir plus d'informations";
            break;
        }
        case CLProximityFar:
        {
            self.rangeStatusImageView.image = [UIImage imageNamed:@"far.jpg"];
            [self.rangeStatusImageView stopAnimating];
            self.rangeStatusImageView.hidden = NO;
            self.signalStatusImageView.hidden = NO;
            self.descriptionStateLabel.text = @"Bienvenue dans notre Pharmacie Lloyd's Pharma Soleilmont.";
            break;
        }
        default:
            break;
    }
    self.beaconsArray = [beacons sortedArrayUsingDescriptors:sortDescriptors];
}
}