核心蓝牙iOS CBCentralStateUnsupported

Question

我正在尝试使用CoreBluetooth框架扫描所有可用的外围设备。

@implementation ViewController



@synthesize myCentralManager;

-(id)init{

    self=[super init];
    if(self){
        myCentralManager=[[CBCentralManager alloc]initWithDelegate:self queue:dispatch_get_main_queue()];
        [myCentralManager scanForPeripheralsWithServices:nil options:@{CBCentralManagerScanOptionAllowDuplicatesKey:@YES}];
    }
    return self;
}

- (void)viewDidLoad {
    [super viewDidLoad];

    myCentralManager=[[CBCentralManager alloc]initWithDelegate:self queue:nil];

    //[self scanForPeripherals];

}



- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

+ (NSString*)UUIDString:(CFUUIDRef)uuid {
    CFStringRef string = CFUUIDCreateString(NULL, uuid);
    return (__bridge_transfer NSString*)string;
}

- (void)centralManagerDidUpdateState:(CBCentralManager *)central {
    //NSLog(@"DidUpdateState");

    if(central.state==CBCentralManagerStateUnknown)
        NSLog(@"Unknown State");
    else
    if(central.state==CBCentralManagerStateUnsupported)
        NSLog(@"State Unsupported");
    else
    if (central.state == CBCentralManagerStatePoweredOn) {
        [self scanForPeripherals];
    } else
            NSLog(@"Turn on Bluetooth");

}

- (void)centralManager:(CBCentralManager *)central
 didDiscoverPeripheral:(CBPeripheral *)peripheral
     advertisementData:(NSDictionary *)advertisementData
                  RSSI:(NSNumber *)RSSI {
    NSLog(@"Received peripheral : \n%@", peripheral);
    NSLog(@"Adv data : %@", advertisementData);

    [peripheral setDelegate:self];
    [central connectPeripheral:peripheral options:nil];
    [peripheral readRSSI];
}



- (int)scanForPeripherals {
    NSLog(@"Scanning");

    if(self.myCentralManager.state!=CBCentralManagerStatePoweredOn)
        NSLog(@"Turn on Bluetooth");
    NSDictionary *options = [NSDictionary dictionaryWithObjectsAndKeys:
                             [NSNumber numberWithBool:NO], CBCentralManagerScanOptionAllowDuplicatesKey,
                             nil];
    NSLog(@"Scanning");
    [myCentralManager scanForPeripheralsWithServices:nil options:options];
    return 0;
}

- (void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)peripheral {
    NSLog(@"didConnectPeripheral");
}

- (void)centralManager:(CBCentralManager *)central didDisconnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error {
    NSLog(@"didDisconnectPeripheral");
}

- (void)centralManager:(CBCentralManager *)central didFailToConnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error {
    NSLog(@"failed to connect");
}

- (void)peripheral:(CBPeripheral *)peripheral didReadRSSI:(NSNumber *)RSSI error:(NSError *)error {
    NSLog(@"didReadRSSI");
}

@end

即使我检查了我的系统支持蓝牙4.0 LMP 0x6，我的代码总是返回State Unsupported。任何帮助将非常感谢！ 感谢。