iOS iBeacon初探

最近开发一个蓝牙挖宝的功能，记录一下

需求：一个商场每家店铺有好几种优惠券 ，通过摇一摇获取，并获取最近的

参考资料：http://www.tuicool.com/articles/iI7nQf 

                  http://www.jianshu.com/p/7816b016ceac

总结一下就是： UUID  你的唯一标识，用来监听商场的所有商铺 ，major  每一家店铺的标识， minor 店铺内每个商品的标识。

1，准备工作

 首先在info.plist 文件中设置

     Privacy - Bluetooth Peripheral Usage Description    （我要访问蓝牙，需要您的授权）

     Privacy - Location When In Use Usage Description  （在使用期间，我要访问您的位置）

 2，在你需要实现的页面导入  

#import <CoreBluetooth/CoreBluetooth.h>

#import <CoreLocation/CoreLocation.h>

声明代理 <CLLocationManagerDelegate,CBPeripheralManagerDelegate>>

@property (nonatomic, strong) CLLocationManager *locationManager;@property (nonatomic, strong) CLBeaconRegion *beaconRegion;//被扫描的iBeacon@property (nonatomic, strong) NSArray *beaconArr;//存放扫描到的iBeacon@property (nonatomic, copy) NSString *uuidString;@property (nonatomic, strong) CBPeripheralManager *manager;

3.在viewDidLoad中 设置iBeacon数据

    //  设置允许摇一摇功能

    [UIApplication sharedApplication].applicationSupportsShakeToEdit =YES;

   self.manager = [[CBPeripheralManager alloc]initWithDelegate:self queue:nil];    self.locationManager = [[CLLocationManager alloc] init];       if(![CLLocationManager isRangingAvailable]){//是否支持测距        return;    }    self.locationManager.delegate = self;    [self.locationManager requestWhenInUseAuthorization];        //iBeacon uuid    NSUUID *proximityUUID = [[NSUUID alloc] initWithUUIDString:@"你的UUID"];    self.beaconRegion = [[CLBeaconRegion alloc] initWithProximityUUID:proximityUUID identifier:@"Identifier"];    self.beaconRegion.notifyEntryStateOnDisplay = YES;//进入监测区域时是否通知    [self.locationManager startMonitoringForRegion:self.beaconRegion];//开始检测

然后实现代理方法

#pragma mark - CBPeripheralManagerDelegate- (void)peripheralManagerDidUpdateState:(CBPeripheralManager *)peripheral{    switch (peripheral.state) {        case CBPeripheralManagerStatePoweredOn: {            NSLog(@"蓝牙开启且可用");            [SVProgressHUD showSuccessWithStatus:@"蓝牙可用"];        }            break;        default:            NSLog(@"蓝牙不可用");            [SVProgressHUD showErrorWithStatus:@"蓝牙不可用"];            break;    }}#pragma mark - CLLocationManagerDelegate//进入监测区域的时候调用-(void)locationManager:(CLLocationManager *)manager didEnterRegion:(CLRegion *)region{     [self.locationManager startRangingBeaconsInRegion:self.beaconRegion];}//离开监测区域的时候调用-(void)locationManager:(CLLocationManager *)manager didExitRegion:(nonnull CLRegion *)region{        [self.locationManager stopRangingBeaconsInRegion:self.beaconRegion];}//改变授权状态的时候调用- (void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status{    [CLLocationManager authorizationStatus];    [self.locationManager startRangingBeaconsInRegion:self.beaconRegion];    }//在监测区域中找到我们的iBeacon设备的时候调用- (void)locationManager:(CLLocationManager *)manager        didRangeBeacons:(NSArray *)beacons               inRegion:(CLBeaconRegion *)region {    //判断一下是不是你的UUID    if (![[region.proximityUUID UUIDString] isEqualToString:@"你的UUID"]){        [self.locationManager stopMonitoringForRegion:region];        [self.locationManager stopRangingBeaconsInRegion:region];    }    //打印所有iBeacon的信息    for (CLBeacon* beacon in beacons) {        switch (beacon.proximity) {            case CLProximityNear: {                NSLog(@"近");                self.uuidString = [NSString stringWithFormat:@"%@-%@-%@",beacon.proximityUUID.UUIDString,major,beacon.minor];                break;            }            case CLProximityFar: {                NSLog(@"远");                self.uuidString =[NSString stringWithFormat:@"%@-%@-%@",beacon.proximityUUID.UUIDString,major,beacon.minor];                break;            }            default:                break;        }    }}

这样应该可以了吧，结果现场测试的时候有问题，不能根据距离自动获取比较近的uuidString，原来是

- (void)locationManager:(CLLocationManager *)manager        didRangeBeacons:(NSArray *)beacons               inRegion:(CLBeaconRegion *)region 

这个方法只调用了一次，没有办法，我只好在

- (void)motionBegan:(UIEventSubtype)motion withEvent:(UIEvent *)event{    self.locationManager = [[CLLocationManageralloc] init];    if(![CLLocationManagerisRangingAvailable]){//是否支持测距        return;    }    if (self.locationManager.rangedRegions.count > 0) {        NSLog(@"Didn't turn on ranging: Ranging already on.");        return;    }    self.locationManager.delegate =self;    [self.locationManagerrequestWhenInUseAuthorization];    [self.locationManagerstartMonitoringForRegion:self.beaconRegion];}

重新初始化了一下，效果是实现了，但如果一直摇，它就会一直分配新的内存地址，总觉得这样是不对的。

想看看它占多大内存，导入

#import <malloc/malloc.h>NSLog(@"Size of %@: %zd",NSStringFromClass([self.locationManagerclass]), malloc_size((__bridgeconst void *)self.locationManager));

结果是 

Size of CLLocationManager: 16

参考：点击打开链接
后来想了想，用完以后：把对象置为nil，但是不行，代理方法不执行，暂时就只能先这样了。