我正在尝试开发基于蓝牙的应用程序，该应用程序将为用户提供通过蓝牙配对共享数据的功能。我在配对设备时遇到问题。
这是我的场景 用户将登录应用程序并提示启用蓝牙服务。这是相同的代码：-
//MARK: - DECLARATIONS
var cbCentralManager : CBCentralManager?
var peripheral : CBPeripheral?
var peripherals: [CBPeripheral] = []
//MARK: - VIEW_METHODS
override func viewDidLoad() {
super.viewDidLoad()
self.setUpView()
}
func setUpView() {
cbCentralManager = CBCentralManager(delegate: self, queue: nil)
}
//MARK: - EXTENSION
extension ViewController : CBCentralManagerDelegate {
func centralManagerDidUpdateState(_ central: CBCentralManager) {
if central.state == .poweredOn {
print("Bluetooth is enabled..")
central.scanForPeripherals(withServices: nil, options: nil)
} else {
print("Bluetooth is not enabled..")
}
}
func centralManager(_ central: CBCentralManager, didDiscover peripheral: CBPeripheral, advertisementData: [String : Any], rssi RSSI: NSNumber) {
guard peripheral.name != nil else {return}
print("Sensor Found!")
//stopScan
cbCentralManager?.stopScan()
//connect
cbCentralManager?.connect(peripheral, options: nil)
self.peripheral = peripheral
}
func centralManager(_ central: CBCentralManager, didConnect peripheral: CBPeripheral) {
//discover all service
peripheral.discoverServices(nil)
peripheral.delegate = self
}
在下一步中，单击按钮，将扫描附近的 BLE 设备。
func startScan() {
let options: [String: Any] = [CBCentralManagerScanOptionAllowDuplicatesKey:
NSNumber(value: false)]
peripherals = []
print("Now Scanning...")
self.timer.invalidate()
centralManager?.scanForPeripherals(withServices: nil, options: options)
Timer.scheduledTimer(timeInterval: 17, target: self, selector: #selector(self.cancelScan), userInfo: nil, repeats: false)
}
用户从扫描的 BLE 设备列表中选择要配对的设备后，将执行以下代码以建立设备之间的连接。
func connectToDevice(device:CBPeripheral) {
centralManager = CBCentralManager(delegate: self, queue: .main)
self.blePeripheral = device
self.blePeripheral?.delegate = self
centralManager?.connect(self.blePeripheral!, options: nil)
}
委托方法已扩展
extension HomeVC : CBPeripheralDelegate {
func peripheralManagerDidUpdateState(_ peripheral: CBPeripheralManager) {
if peripheral.state == .poweredOn {
return
}
print("Peripheral manager is running")
}
//Check when someone subscribe to our characteristic, start sending the data
func peripheralManager(_ peripheral: CBPeripheralManager, central: CBCentral, didSubscribeTo characteristic: CBCharacteristic) {
print("Device subscribe to characteristic")
}
func peripheral(_ peripheral: CBPeripheral, didDiscoverServices error: Error?) {
print("*******************************************************")
if ((error) != nil) {
print("Error discovering services: \(error!.localizedDescription)")
return
}
guard let services = peripheral.services else {
return
}
//We need to discover the all characteristic
for service in services {
peripheral.discoverCharacteristics(nil, for: service)
// bleService = service
}
}
func peripheral(_ peripheral: CBPeripheral, didDiscoverCharacteristicsFor service: CBService, error: Error?) {
if ((error) != nil) {
print("Error discovering services: \(error!.localizedDescription)")
return
}
guard let services = peripheral.services else {
return
}
//We need to discover the all characteristic
for service in services {
peripheral.discoverCharacteristics(nil, for: service)
// bleService = service
}
print("Discovered Services: \(services)")
}
func peripheralManagerDidStartAdvertising(_ peripheral: CBPeripheralManager, error: Error?) {
if let error = error {
print("\(error)")
let errorStr = "\(error)"
let alert = UIAlertController(title: "Alert", message: errorStr, preferredStyle: UIAlertController.Style.alert)
alert.addAction(UIAlertAction(title: "Ok", style: UIAlertAction.Style.default, handler: nil))
self.present(alert, animated: true, completion: nil)
return
}
}
}
我被卡住了，因为我没有收到配对设备的警报。任何人都可以指导我吗？提前致谢。