我找到了cool tutorial来编写应用程序,该应用程序列出了Swift中iOS 10 iPhone上所有可用的蓝牙设备。它可以正常工作。在具有蓝牙功能的iPhone上运行该应用程序,它会在tableView中查找并展示我的Macbook,Linux计算机和随机的“未命名”设备。但是,找不到我的BeatsByDre无线耳机,处于“可发现模式”的Raspberry Pi或插入计算机(运行linux)的简单蓝牙加密狗。

我的问题是:我到底不了解/做错什么?

这是我的表格视图代码:

    import CoreBluetooth
    import UIKit

    class ScanTableViewController: UITableViewController,CBCentralManagerDelegate {

    var peripherals:[CBPeripheral] = []
    var manager: CBCentralManager? = nil
    var parentView:MainViewController? = nil


    override func viewDidLoad() {
        super.viewDidLoad()
    }

    override func viewDidAppear(_ animated: Bool) {
        scanBLEDevice()
    }
    func scanBLEDevice(){
        manager?.scanForPeripherals(withServices: nil, options: nil)

        DispatchQueue.main.asyncAfter(deadline: .now() + 60.0) {
            self.stopScanForBLEDevice()
        }

    }
    func stopScanForBLEDevice(){
        manager?.stopScan()
        print("scan stopped")
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }
    override func numberOfSections(in tableView: UITableView) -> Int {
        // #warning Incomplete implementation, return the number of sections
        return 1
    }
    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        // #warning Incomplete implementation, return the number of rows
        return peripherals.count
    }

    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "scanTableCell", for: indexPath)
        let peripheral = peripherals[indexPath.row]
        cell.textLabel?.text = peripheral.name
        return cell
    }

    override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        let peripheral = peripherals[indexPath.row]
        manager?.connect(peripheral, options: nil)
    }

    //CBCentralMaganerDelegate code
    func centralManager(_ central: CBCentralManager, didDiscover peripheral: CBPeripheral, advertisementData: [String : Any], rssi RSSI: NSNumber) {
        if (!peripherals.contains(peripheral)){
        peripherals.append(peripheral)
            }
        self.tableView.reloadData()
        }
    func centralManagerDidUpdateState(_ central: CBCentralManager) {
        print(central.state)
    }
    func centralManager(_ central: CBCentralManager, didConnect peripheral: CBPeripheral) {
        // pass reference to connected peripheral to parentview
        parentView?.mainPeripheral = peripheral
        peripheral.delegate = parentView
        peripheral.discoverServices(nil)
        // set manager's delegate view to parent so it can call relevant disconnect methods
        manager?.delegate = parentView
        parentView?.customiseNavigationBar()

        if let navController = self.navigationController{
            navController.popViewController(animated: true)

        }
        print("Connected to "+peripheral.name!)
    }

    func centralManager(_ central: CBCentralManager, didFailToConnect peripheral: CBPeripheral, error: Error?) {
        print(error!)
    }

基本上,我会寻找外围设备并将其列出到此Table View Controller中。为什么我在列表中看不到无线耳机,却可以在“设置”>“蓝牙”下看到它们?我是否完全误解了什么是外围设备?我已经阅读了Apple文档,然后阅读了一些。我应该在代码中寻找什么?我应该使用信标/ iBeacon吗?

最佳答案

您将只能发现低功耗蓝牙(BLE)设备。

您列出的设备是Bluetooth 2.1设备,Core Bluetooth无法看到它们或不宣传GATT服务。

10-01 00:51
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