在我的iOS应用中，我想使用swift 3搜索设备。如何在我的应用中使用核心蓝牙实现此功能？
答案 0 :(得分：0)
这下面的代码我在互联网上重新编写的内容以及我朋友的帮助列出蓝牙设备并连接到心率测量服务
class HRMViewController: UIViewController {
@IBOutlet weak var tableView: UITableView!
var cbCentralManager: CBCentralManager?
var cbPeripheral: CBPeripheral?
var discoveredPeripherals = [CBPeripheral]()
var connected = ""
var bodyData = ""
var manufacturer = ""
var deviceData = ""
var heartRate: UInt16 = 0
var localNameArray = [String]()
var pulseTimer: Timer?
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
// Do any additional setup after loading the view.
tableView.register(UITableViewCell.self, forCellReuseIdentifier: "cell")
tableView.backgroundColor = UIColor.lightGray
tableView.layer.borderColor = UIColor.lightGray.cgColor
tableView.layer.borderWidth = 1.0
tableView.layer.cornerRadius = 2.0
tableView.layer.masksToBounds = true
let centralManager = CBCentralManager(delegate: self, queue: nil)
self.cbCentralManager = centralManager
}
}
extension HRMViewController : CBCentralManagerDelegate, CBPeripheralDelegate {
func centralManager(_ central: CBCentralManager, didDiscover peripheral: CBPeripheral, advertisementData: [String : Any], rssi RSSI: NSNumber) {
let localName = advertisementData[CBAdvertisementDataLocalNameKey] as? String ?? ""
if localName.count > 0 {
if RSSI.intValue > signalStrengthMax {
if let index = self.discoveredPeripherals.index(of: peripheral) {
self.discoveredPeripherals.remove(at: index)
self.localNameArray.remove(at: index)
self.tableView.reloadData()
}
return
}
if RSSI.intValue < signalStrengthMin {
if let index = self.discoveredPeripherals.index(of: peripheral) {
self.discoveredPeripherals.remove(at: index)
self.localNameArray.remove(at: index)
self.tableView.reloadData()
}
return
}
print("Discovered: \(peripheral.name ?? "a device") with udid: \(peripheral.identifier) at \(RSSI)")
if !(self.discoveredPeripherals.contains(peripheral)) {
self.discoveredPeripherals.append(peripheral)
self.localNameArray.append(localName)
self.tableView.reloadData()
}
}
}
func centralManager(_ central: CBCentralManager, didConnect peripheral: CBPeripheral) {
peripheral.delegate = self
peripheral.discoverServices(nil)
self.connected = "Connected: \((peripheral.state == .connected) ? "Yes" : "No")"
}
func centralManagerDidUpdateState(_ central: CBCentralManager) {
if central.state != .poweredOn {
return
}
if central.state == .poweredOn {
let deviceService = CBUUID(string: HRMConstants.Services.deviceInfoUUID)
let heartRateService = CBUUID(string: HRMConstants.Services.heartRateUUID)
let services = [deviceService,heartRateService]
cbCentralManager?.scanForPeripherals(withServices: services, options: nil)
}
}
func peripheral(_ peripheral: CBPeripheral, didDiscoverServices error: Error?) {
for service in peripheral.services ?? [CBService]() {
peripheral.discoverCharacteristics(nil, for: service)
}
}
func peripheral(_ peripheral: CBPeripheral, didDiscoverCharacteristicsFor service: CBService, error: Error?) {
if service.uuid == CBUUID(string: HRMConstants.Services.heartRateUUID) {
for character in service.characteristics ?? [CBCharacteristic]() {
if character.uuid == CBUUID(string: HRMConstants.Characteristics.measurementUUID) {
self.cbPeripheral?.setNotifyValue(true, for: character)
}
else if character.uuid == CBUUID(string: HRMConstants.Characteristics.bodyLocationUUID) {
self.cbPeripheral?.readValue(for: character)
}
}
}
if service.uuid == CBUUID(string: HRMConstants.Services.deviceInfoUUID) {
for character in service.characteristics ?? [CBCharacteristic]() {
if character.uuid == CBUUID(string: HRMConstants.Characteristics.manufacturerNameUUID) {
self.cbPeripheral?.readValue(for: character)
}
}
}
}
func peripheral(_ peripheral: CBPeripheral, didUpdateValueFor characteristic: CBCharacteristic, error: Error?) {
if characteristic.uuid == CBUUID(string: HRMConstants.Characteristics.measurementUUID) {
self.getHeartRateData(for: characteristic, error: error)
}
if characteristic.uuid == CBUUID(string: HRMConstants.Characteristics.manufacturerNameUUID) {
self.getManufacturerName(for: characteristic)
}
else if characteristic.uuid == CBUUID(string: HRMConstants.Characteristics.bodyLocationUUID) {
self.getBodyLocation(for: characteristic)
}
}
}
extension HRMViewController {
func getHeartRateData(for characteristic: CBCharacteristic, error: Error?) {
if let _ = error {
print("Error: \(error?.localizedDescription ?? "Unknown")")
return
}
guard let value = characteristic.value else { return }
let bpm : UInt16
if (value[0] & 0x01) == 0 {
bpm = UInt16(value[1])
} else {
bpm = UInt16(littleEndian: value.subdata(in: 1..<3).withUnsafeBytes { $0.pointee } )
}
heartRate = bpm
doHeartBeat()
pulseTimer = Timer.scheduledTimer(timeInterval: 60.0 / Double(heartRate), target: self, selector: #selector(self.doHeartBeat), userInfo: nil, repeats: false)
/*
var reportData = [UInt8](value)
var bpm: UInt16 = 0
if (reportData[0] & 0x01) == 0 {
bpm = UInt16(reportData[1])
}
else {
bpm = CFSwapInt16LittleToHost(UInt16(reportData[1]))
}
heartRate = bpm
doHeartBeat()
pulseTimer = Timer.scheduledTimer(timeInterval: 60.0 / Double(heartRate), target: self, selector: #selector(self.doHeartBeat), userInfo: nil, repeats: false)
*/
}
func getManufacturerName(for characteristic: CBCharacteristic) {
guard let value = characteristic.value else { return }
let manufacturerName = String(data: value, encoding: .utf8)
}
func getBodyLocation(for characteristic: CBCharacteristic) {
guard let value = characteristic.value else { return }
var location = ""
// 1
var bodyData = [UInt8](value)
if !bodyData.isEmpty {
let bodyLocation: UInt8 = bodyData[0]
// 2
location = "Body Location: \(bodyLocation == 1 ? "Chest" : "Undefined")"
// 3
}
else {
// 4
location = "Body Location: N/A"
}
print(location)
}
@objc func doHeartBeat() {
}
}
extension HRMViewController : UITableViewDelegate, UITableViewDataSource {
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell")
cell?.textLabel?.text = "\(localNameArray[indexPath.row]) \(discoveredPeripherals[indexPath.row].identifier )"
return cell!
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let newPeripheral = discoveredPeripherals[indexPath.row]
if let _ = cbPeripheral { // had a device selected already
if newPeripheral != cbPeripheral! { // clean up old peripheral
self.cleanUp()
}
}
cbPeripheral = newPeripheral
self.cbCentralManager?.stopScan()
cbPeripheral?.delegate = self
self.cbCentralManager?.connect(cbPeripheral!, options: nil)
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return discoveredPeripherals.count
}
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return 45.0
}
func cleanUp() {
if !(cbPeripheral!.state == .connected) { // Don't do anything if we're not connected
return
}
if let services = self.cbPeripheral!.services {
for eachService in services {
if let characteristics = eachService.characteristics {
for eachCharacteristic in characteristics {
if eachCharacteristic.uuid.isEqual(CBUUID(string: HRMConstants.Characteristics.bodyLocationUUID)) {
if eachCharacteristic.isNotifying {
self.cbPeripheral?.setNotifyValue(false, for: eachCharacteristic)
}
}
if eachCharacteristic.uuid.isEqual(CBUUID(string: HRMConstants.Characteristics.manufacturerNameUUID)) {
if eachCharacteristic.isNotifying {
self.cbPeripheral?.setNotifyValue(false, for: eachCharacteristic)
}
}
if eachCharacteristic.uuid.isEqual(CBUUID(string: HRMConstants.Characteristics.measurementUUID)) {
if eachCharacteristic.isNotifying {
self.cbPeripheral?.setNotifyValue(false, for: eachCharacteristic)
}
}
}
}
}
}
self.cbCentralManager?.cancelPeripheralConnection(self.cbPeripheral!)
self.cbPeripheral = nil
}
}
和常量
struct HRMConstants {
struct Services {
static let deviceInfoUUID = "180A"
static let heartRateUUID = "180D"
}
struct Characteristics {
static let measurementUUID = "2A37"
static let bodyLocationUUID = "2A38"
static let manufacturerNameUUID = "2A29"
}
}
通过这个你将得到基本的想法，然后你可以自己尝试
查看针对不同蓝牙服务的ble doc