CoreBluetooth配对反馈/回调

Question

感觉我在这里遗漏了一些东西,但是如何获得关于配对受密码保护的外围设备失败还是成功的反馈？

当我连接受密码保护的外围设备时,弹出密码UIAlertView并连接外围设备(didConnectPeripheral),并立即断开连接(didDisconnectPeripheral).

[bluetoothManager connectPeripheral:peripheral options:nil];

现在我是否输入正确的密码,错误的密码或只是按下取消:在任何情况下我都没有收到来自CoreBluetooth委托方法的任何反馈.

问题是如何获得有关此过程的反馈？

Answer 1

在这里发布多年的问题后面临同样的问题。令人惊讶的是，Apple 没有提供任何关于配对是否成功的回调。但是，可以使用以下步骤得出相同的结论：

1. 声明和初始化：

var centralManager: CBCentralManager?
var myPeripheral: CBPeripheral?
var peripheralManager: CBPeripheralManager?

centralManager = CBCentralManager(delegate: self, queue: DispatchQueue.main)
peripheralManager = CBPeripheralManager.init(delegate: self, queue: DispatchQueue.main )

2. CBCentralManager处于.poweredOn状态时扫描设备：

func centralManagerDidUpdateState(_ central: CBCentralManager) {
   if central.state == .poweredOn {
       centralManager?.scanForPeripherals(withServices: [CBUUID.init(string: "SERVICE-ID")])
   }
}

3. 识别并连接到感兴趣的设备：

func centralManager(_ central: CBCentralManager, didDiscover peripheral: CBPeripheral, advertisementData: [String : Any], rssi RSSI: NSNumber) {
    //Identify the device to be connected
    if peripheral.name?.hasSuffix("DEVICE-SERIAL-NUMBER") ?? false {
        myPeripheral = peripheral
        peripheral.delegate = self
        centralManager?.connect(myPeripheral!, options: nil)
    }
}

4. 发现连接设备的服务，然后发现这些服务的特征

func centralManager(_ central: CBCentralManager, didConnect peripheral: CBPeripheral) {
        peripheral.discoverServices([CBUUID.init(string: "SERVICE-ID-STRING")])
    }

func peripheral(_ peripheral: CBPeripheral, didDiscoverServices error: Error?) {       
    let services = peripheral.services!
    let charId = CBUUID.init(string: “CHARACTERISTIC-ID”)
    for service in services {
        peripheral.discoverCharacteristics([charId], for: service)
    }
}

5. 对于具有.notify属性的这些特征之一，将一些写入类型的数据写入为.withResponse

    func peripheral(_ peripheral: CBPeripheral, didDiscoverCharacteristicsFor service: CBService, error: Error?) {
    let value = 1234
    let data = withUnsafeBytes(of: value) { Data($0) }
    for characteristic in service.characteristics!
    {
        if characteristic.properties.contains(.notify) {
            peripheral.setNotifyValue(true, for: characteristic)
            peripheral.writeValue(data, for: characteristic, type: .withResponse)   
        }
    }
}

6. 检查此写入的响应以确定配对是否成功：

func peripheral(_ peripheral: CBPeripheral, didWriteValueFor characteristic: CBCharacteristic, error: Error?) { }

如果由于密码输入无效或用户取消而导致配对不成功，您将收到“身份验证不足”的错误提示

否则写入特性将成功，错误对象将为 nil。