调用时，CBPeripheralManager不会打开电源

Question

当我调用if语句检查外设状态时，我的代码一直卡住。当我将操作从！=更改为==时，它会通过并执行NSLog，但调试器表示外围管理器未打开。我该如何纠正这个？

我首先在viewDidLoad方法中启动外围设备管理器：

- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.

// Start up the CBPeripheralManager
self.peripheralManager = [[CBPeripheralManager alloc] initWithDelegate:self queue:nil];

NSLog(@"viewDidLoad");
}

然后我调用peripheralManagerDidUpdateState方法：

- (void)peripheralManagerDidUpdateState:(CBPeripheralManager *)peripheralManager
{
    // Opt out from any other state
if (self.peripheralManager.state != CBPeripheralManagerStatePoweredOn)
{
    return;
}

// We're in CBPeripheralManagerStatePoweredOn state...
NSLog(@"self.peripheralManager powered on.");

// ... so build our service.


// Then the service
CBMutableService *transferService = [[CBMutableService alloc] initWithType:[CBUUID UUIDWithString:TRANSFER_SERVICE_UUID] primary:YES];


// And add it to the peripheral manager
[self.peripheralManager addService:transferService];
}

由于推送了IBAction /按钮，我在程序中稍后调用了startAdvertising命令：

- (IBAction)advertise:(id)sender
{
if(self.peripheralManager.state == CBPeripheralManagerStatePoweredOn)
{
[self.peripheralManager startAdvertising:@{ CBAdvertisementDataServiceUUIDsKey : @[[CBUUID UUIDWithString:TRANSFER_SERVICE_UUID]] }];
[self.peripheralManager startAdvertising:@{ CBAdvertisementDataTxPowerLevelKey : @(YES)}];
}
}

通过调用startAdvertising来检查外围设备状态而不是BEFORE与此错误有关吗？