CBPeripheralManagerState始终显示state = off

Question

所以我有这个peripheralManager。我想检查，如果它的状态是否开启：

  if (peripheralManager.state <  CBPeripheralManagerStatePoweredOn) {
        UIAlertView *errorAlert = [[UIAlertView alloc] initWithTitle:@"Bluetooth must be enabled" message:@"To search for pics, you have to enable bluetooth." delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
        [errorAlert show];

    }

我正在iPhone 5上进行测试，蓝牙显然已经开启了。但它始终显示它已关闭。

更新 我该如何解决？