最近做一个店铺签到获取积分的App，用到了iBeacon，蛮好玩的一个小玩意，简单来说iBeacon这个小设备，可以被手机通过蓝牙搜索到，并能比较精确的显示距离，和拿到该iBeacon的uuid，major，minor。其中uuid 是一个区域内的唯一标识符，用它可以区别一个公司的iBeacon，而用major和minor 来区别店铺和具体哪台设备。

客户端代码实现

//BeaconClient.h
#import <Foundation/Foundation.h>
#import <CoreLocation/CoreLocation.h>
#import <CoreBluetooth/CoreBluetooth.h>

@interface BeaconClient : NSObject<CLLocationManagerDelegate>
{
    CLLocationManager * _locationManager;
    CLBeaconRegion * _region;
    BOOL _isInsideRegion;
}

- (BOOL)openClient;
- (void)closeClient;

@end

//BeaconClient.m
#import "BeaconClient.h"
@implementation BeaconClient

- (id)init
{
    if (self = [super init]) {
        _isInsideRegion = NO;
        _locationManager = [[CLLocationManager alloc] init];
        _locationManager.delegate = self;
        
        NSUUID *estimoteUUID = [[NSUUID alloc] initWithUUIDString:kUUID];
        _region = [[CLBeaconRegion alloc] initWithProximityUUID:estimoteUUID identifier:kIndetifier];
        // launch app when display is turned on and inside region
        _region.notifyEntryStateOnDisplay = YES;
    }
    return self;
}

- (BOOL)openClient
{
    if ([CLLocationManager locationServicesEnabled]) {
        //开始定位用户的位置
        [_locationManager startUpdatingLocation];
        [_locationManager requestAlwaysAuthorization];
        //每隔多少米定位一次（这里的设置为任何的移动）
        _locationManager.distanceFilter=kCLDistanceFilterNone;
        _locationManager.desiredAccuracy=kCLLocationAccuracyBestForNavigation;
    }else{//不能定位用户的位置
        //1.提醒用户检查当前的网络状况
        //2.提醒用户打开定位开关
    }
    
    if ([CLLocationManager isMonitoringAvailableForClass:[CLBeaconRegion class]])
    {
        [_locationManager startMonitoringForRegion:_region];
        [_locationManager startRangingBeaconsInRegion:_region];
        [_locationManager requestStateForRegion:_region];
        return YES;
    }else{
        [self showAlertView:nil message:@"This device does not support monitoring beacon regions"];
        return NO;
    }
}

- (void)closeClient
{
    [_locationManager stopMonitoringForRegion:_region];
    [_locationManager stopRangingBeaconsInRegion:_region];
    
}
-(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
{
    NSLog(@"!!");
}
#pragma mark - CLLocationManagerDelegate
- (void)locationManager:(CLLocationManager *)manager
      didDetermineState:(CLRegionState)state forRegion:(CLRegion *)region
{
    if(state == CLRegionStateInside)
    {
        _isInsideRegion = YES;
    }else if(state == CLRegionStateOutside){
        _isInsideRegion = NO;
    }else{
        _isInsideRegion = NO;
    }
}

-(void)locationManager:(CLLocationManager *)manager didRangeBeacons:(NSArray *)beacons inRegion:(CLBeaconRegion *)region
{
    //发现iBeacon Server
    for (CLBeacon* beacon in beacons) {
        
        NSString * info_1 = [NSString stringWithFormat:@"UUIDString:%@",beacon.proximityUUID.UUIDString];
        NSString * info_2 = [NSString stringWithFormat:@"major:%@",beacon.major];
        NSString * info_3 = [NSString stringWithFormat:@"minor:%@",beacon.minor];
        NSString * info_4 = [NSString stringWithFormat:@"accuracy:%0.4f米",beacon.accuracy];
        NSString * info_5 = [NSString stringWithFormat:@"proximity:%ld",beacon.proximity];
        NSString * info_6 = [NSString stringWithFormat:@"rssi:%ld",(long)beacon.rssi];
        
        NSString * debugInfo = [NSString stringWithFormat:@"%@\n%@\n%@\n%@\n%@\n%@\n",info_1,info_2,info_3,info_4,info_5,info_6];
        NSLog(@"%@",debugInfo);
    }
}

- (void)locationManager:(CLLocationManager *)manager
         didEnterRegion:(CLRegion *)region
{
    NSLog(@"didEnterRegion");
    if (_isInsideRegion) return;
    if ([UIApplication sharedApplication].applicationState == UIApplicationStateBackground)
    {
        [self sendEnterLocalNotification];
    }else{
        [self showAlertView:nil message:@"Hi，你已经进入 iSS iBeacon region"];
    }
}


- (void)locationManager:(CLLocationManager *)manager
          didExitRegion:(CLRegion *)region
{
    NSLog(@"didExitRegion");
    if (!_isInsideRegion) return;
    if ([UIApplication sharedApplication].applicationState == UIApplicationStateBackground)
    {
        [self sendExitLocalNotification];
    }else{
        [self showAlertView:nil message:@"sorry，你离开了 iSS iBeacon region"];
    }
}

- (void)showAlertView:(NSString *)title message:(NSString *)msg
{
    UIAlertView * alertView = [[UIAlertView alloc] initWithTitle:title
                                                         message:msg
                                                        delegate:nil
                                               cancelButtonTitle:@"确定"
                                               otherButtonTitles:nil];
    [alertView show];
}

- (void)sendEnterLocalNotification
{
    UILocalNotification *notice = [[UILocalNotification alloc] init];
    notice.alertBody = @"Hi，你已经进入 iSS iBeacon region，打开应用获取最新信息";
    notice.alertAction = @"Open";
    notice.soundName = UILocalNotificationDefaultSoundName;
    [[UIApplication sharedApplication] scheduleLocalNotification:notice];
}

- (void)sendExitLocalNotification
{
    UILocalNotification *notice = [[UILocalNotification alloc] init];
    notice.alertBody = @"sorry，你离开了 iSS iBeacon region";
    notice.alertAction = @"Open";
    notice.soundName = UILocalNotificationDefaultSoundName;
    [[UIApplication sharedApplication] scheduleLocalNotification:notice];
}
@end

项目源码地址 感谢作者的分享
同时可以参考苹果官方源码，里面有设计多个uuid同时检测
苹果官方提供demo