iBeacon:CBPeripheralManager:0x1557b230只能在通电状态下接受此命令

Question

我有一个带iOS 7.1的4s设备.我正在尝试实现一些代码,这些代码可以帮助我的设备像信标设备那样运行,但我收到错误"只能在启动状态下接受此命令".

我正在实现这段代码:

@implementation ViewController


-(void)viewDidLoad 
{


    [super viewDidLoad];
    beaconPeripheralData=[[NSDictionary alloc]init];
     peripheralManager.delegate=self;
    _locationManager.delegate=self;
    _locationManager = [[CLLocationManager alloc] init];
    _locationManager.delegate = self;
    [self initWithBeacons];

}

-(void)initWithBeacons

{


    NSNumber * power = [NSNumber numberWithInt:-63];
    NSUUID *uuid=[[NSUUID alloc]initWithUUIDString:@"F24BDBE3-EB98-4A04-A621-91C088DC32D2"];

    CLBeaconRegion *beaconReason=[[CLBeaconRegion alloc]initWithProximityUUID:uuid major:1 identifier:@"blackbean.com"];

    beaconPeripheralData=[beaconReason peripheralDataWithMeasuredPower:power];

peripheralManager=[[CBPeripheralManager alloc]initWithDelegate:self queue:nil];

 [peripheralManager startAdvertising:beaconPeripheralData];

    if ([peripheralManager isAdvertising])
    {

        NSLog(@"peripeheralMAnager is advertising");
    }
    else
    {
        NSLog(@"peripeheralMAnager is not  advertising");
    }

}

-(void)peripheralManagerDidUpdateState:(CBPeripheralManager *)peripheral {


    switch (peripheral.state) {
        case CBPeripheralManagerStatePoweredOn:
            NSLog(@"Powered on");
            [peripheralManager startAdvertising:beaconPeripheralData];
            break;
        case CBPeripheralManagerStatePoweredOff:
            NSLog(@"Powered Off");
            [peripheralManager stopAdvertising];
            break;
        case CBPeripheralManagerStateUnsupported:
            NSLog(@"Device not supported");
            break;
        default:
            break;
    }

}

@end

Answer 1

从CBPeripheralManager文档

在调用CBPeripheralManager方法之前,必须打开外围管理器对象的状态,如下所示 CBPeripheralManagerStatePoweredOn.此状态表示外围设备(例如,您的iPhone或iPad)支持低功耗蓝牙,并且其蓝牙已打开并可供使用.

为了确定外围设备管理器何时就绪,您需要实现didUpdateState外围设备管理器委托方法,并在获得已启动状态后开始做广告,但是startAdvertising在分配完成后,您也可以直接进行呼叫CBPeripheralManager,它会给你错误信息,因为它还没有处于开机状态