我一直收到一个错误,说我的 CBPeripheralManager 没有开机,但在我的代码中我觉得我执行了这个。这是我的代码:
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
// Start up the CBPeripheralManager
_peripheralManager = [[CBPeripheralManager alloc] initWithDelegate:self queue:nil];
// Start up the CBCentralManager
// And somewhere to store the incoming data
_data = [[NSMutableData alloc] init];
}
/** Required protocol method. A full app should take care of all the possible states,
* but we're just waiting for to know when the CBPeripheralManager is ready
*/
- (void)peripheralManagerDidUpdateState:(CBPeripheralManager *)peripheral {
if (peripheral.state == CBPeripheralManagerStatePoweredOn) {
// 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];
}
}
然后我调用我的外围设备开始使用 IBAction 按钮做广告:
- (IBAction)advertise:(id)sender {
[self.peripheralManager startAdvertising:@{ CBAdvertisementDataServiceUUIDsKey : @[[CBUUID UUIDWithString:TRANSFER_SERVICE_UUID]] }];
[self.peripheralManager startAdvertising:@{ CBAdvertisementDataTxPowerLevelKey : @(YES)}];
}
最佳答案
您需要将对 CBPeripheralManager
的所有调用包装在状态检查中,以防止出现这些警告。由于您稍后只是在不确定的时间调用广告,因此您需要确保您的 peripheralManager 仍然通电并准备就绪。
- (IBAction)advertise:(id)sender
{
if(self.peripheralManager.state == CBPeripheralManagerStatePoweredOn)
{
//Now you can call advertise
}
}
关于ios - CBPeripheralManager 未上电,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/20601927/