BLE - SWIFT应用程序不显示写入身份验证特征的配对请求

Question

我正在编写一个应用程序来连接具有可以写入的身份验证特性之一的外围设备。连接到特性的密码是123456.我使用LightBlue Explorer进行测试，它成功提示警报输入密码

Image

但是，当我尝试使用我的应用程序传递值时，它不会弹出，我也看不到任何错误弹出。你们能告诉我应该采用哪种方法来实现这一目标。

这是我的代码

```

import UIKit
import CoreBluetooth

class MainViewController: UIViewController, CBCentralManagerDelegate, CBPeripheralDelegate {

let xxxxxxx_SERVICE = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
let TX_CHARACTERISTIC = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"

var manager : CBCentralManager? = nil
var mainPeripheral : CBPeripheral? = nil
var writeCharacteristic : CBCharacteristic? = nil


@IBOutlet weak var upButton: UIButton!
@IBOutlet weak var downButton: UIButton!

override func viewDidLoad() {
    super.viewDidLoad()

    //addNavBarImage()

    manager = CBCentralManager(delegate: self, queue: nil)
    customiseNavigationBar()

    // Continuous Hold UP Button
    let upButtonlongGesture = UILongPressGestureRecognizer(target: self, action: #selector(MainViewController.upButtonlongTap))
    upButtonlongGesture.minimumPressDuration = 0
    upButton.addGestureRecognizer(upButtonlongGesture)

    // Continuous Hold DOWN Button
    let downButtonlongGesture = UILongPressGestureRecognizer(target: self, action: #selector(MainViewController.downButtonlongTap))
    downButtonlongGesture.minimumPressDuration = 0
    downButton.addGestureRecognizer(downButtonlongGesture)
}

// MARK: - Update Navigation Bar Button

func addNavBarImage() {

    let navController = navigationController!
    let image = #imageLiteral(resourceName: "xxxxxxx_logo")
    let imageView = UIImageView(image: image)

    let bannerWidth = navController.navigationBar.frame.size.width
    let bannerHeight = navController.navigationBar.frame.size.height



    let bannerX = bannerWidth / 2 - image.size.width / 2
    let bannerY = bannerHeight / 2 - image.size.height / 2
    print(bannerX)
    print(bannerY)
    imageView.frame = CGRect(x: bannerX, y: bannerY, width: bannerWidth, height: bannerHeight)
    imageView.contentMode = .scaleAspectFit

    navigationItem.titleView = imageView
}

func customiseNavigationBar() {
    navigationController?.navigationBar.backgroundColor = .white
    navigationController?.navigationBar.isTranslucent = false
    self.navigationItem.rightBarButtonItem = nil

    let rightButton = UIButton()

    if (mainPeripheral == nil) {
        rightButton.setTitle("Scan", for: [])
        rightButton.setTitleColor(UIColor.orange, for: [])
        rightButton.setTitleShadowColor(UIColor.black, for: [])
        rightButton.frame = CGRect(origin: CGPoint(x : 0, y: 0), size: CGSize(width : 60, height: 30))
        rightButton.addTarget(self, action: #selector(self.scanButtonPressed), for: .touchUpInside)
    } else {
        rightButton.setTitle("Disconnect", for: [])
        rightButton.setTitleColor(UIColor.red, for: [])
        rightButton.setTitleShadowColor(UIColor.black, for: [])
        rightButton.frame = CGRect(origin: CGPoint(x : 0, y: 0), size: CGSize(width : 100, height: 30))
        rightButton.addTarget(self, action: #selector(self.disconnectButtonPressed), for: .touchUpInside)
    }

    let rightBarButton = UIBarButtonItem()
    rightBarButton.customView = rightButton
    self.navigationItem.rightBarButtonItem = rightBarButton

}

@objc func scanButtonPressed() {
    print("Scan Button Pressed")
    performSegue(withIdentifier: "scan-segue", sender: nil)
}

@objc func disconnectButtonPressed() {
    print("Disconnect Button Pressed")
    manager?.cancelPeripheralConnection(mainPeripheral!)
    //uncomment after implemented ScanTableViewController
    //manager?.cancelPeripheralConnection(mainPeripheral)
}


// MARK: - Navigation
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    if segue.identifier == "scan-segue" {
        let scanController : ScanTableViewController = segue.destination as! ScanTableViewController
        manager?.delegate = scanController
        scanController.manager = manager
        scanController.parentView = self

    }
}

// MARK - CBCentralManagerDelegate Methods

func centralManagerDidUpdateState(_ central: CBCentralManager) {
    print("BLE Stack Started")

    switch central.state {
    case .poweredOff:
        print("Power is OFF")
        break

    case .resetting:
        print("Resetting")
        break

    case .poweredOn:
        print("Power is ON")
        break

    case .unauthorized:
        print("Unauthorized")
        break

    case .unsupported:
        print("Unsupported")
        break

    default:
        print("Unknown")
        break
    }
}

func centralManager(_ central: CBCentralManager, didDisconnectPeripheral peripheral: CBPeripheral, error: Error?) {
    mainPeripheral = nil
    customiseNavigationBar()

    // Show Pop Up Alert
    let alert = UIAlertController(title: "Notification", message: "Disconnected \(peripheral.name ?? "") Successfully!", preferredStyle: .alert)
    alert.addAction(UIAlertAction(title: "Dismiss", style: .default, handler: nil))
    present(alert, animated: true, completion: nil)

    print("Disconnected " + peripheral.name!)
}

// MARK - CBPeripheralDelegate Methods

func peripheral(_ peripheral: CBPeripheral, didDiscoverServices error: Error?) {
    for service in peripheral.services! {
        print("Services found with UUID: " + service.uuid.uuidString)

        if (service.uuid.uuidString == "180A") {
            peripheral.discoverCharacteristics(nil, for: service)
        }

        if (service.uuid.uuidString == "1800") {
            peripheral.discoverCharacteristics(nil, for: service)
        }

        if ((service.uuid.uuidString == xxxxxx_SERVICE)) {
            peripheral.discoverCharacteristics(nil, for: service)
        }
    }
}

func peripheral(_ peripheral: CBPeripheral, didDiscoverCharacteristicsFor service: CBService, error: Error?) {
    for characteristic in service.characteristics! {
        let aCharacteristic = characteristic as CBCharacteristic
        print(aCharacteristic)
        if (aCharacteristic.uuid.uuidString == TX_CHARACTERISTIC) {
            writeCharacteristic = aCharacteristic
        }
    }
}


// MARK: - Button Pressed Characteristic

// Write Data
func writeBLEData(byte: [UInt8]) {
    let writeData = Data(bytes: byte)

    if mainPeripheral != nil {
        mainPeripheral?.writeValue(writeData, for: writeCharacteristic!, type: CBCharacteristicWriteType.withoutResponse)
    } else {
        print("Haven't discovered any device yet")
    }
}

// Write Value to Controller
@objc func upButtonlongTap(sender : UIGestureRecognizer){
    if sender.state == .ended {
        //Do Whatever You want on End of Gesture
        writeBLEData(byte: [0x00])
    }
    else if sender.state == .began {
        //Do Whatever You want on Began of Gesture
        writeBLEData(byte: [0x01])
    }
}

@objc func downButtonlongTap(sender : UIGestureRecognizer){
    if sender.state == .ended {
        //Do Whatever You want on End of Gesture
        writeBLEData(byte: [0x00])
    }
    else if sender.state == .began {
        //Do Whatever You want on Began of Gesture
        writeBLEData(byte: [0x02])
    }
}

先谢谢你们！