ios - scanForPeripheralWithServices 不返回任何东西

Question

我是 swift 语言的新手。我一直致力于在我的 iOS 应用程序和条形码扫描仪之间建立蓝牙连接。条形码扫描仪启用了蓝牙。我尝试与我的 iPhone 建立全局蓝牙连接并且它有效。根据网上的一些引用，我编写了以下示例代码。

import UIKit
import CoreBluetooth

class ViewController: UIViewController, CBCentralManagerDelegate, CBPeripheralDelegate {

var manager : CBCentralManager!

override func viewDidLoad() {
    super.viewDidLoad()
    manager = CBCentralManager(delegate : self, queue : nil)

}

func centralManagerDidUpdateState(central: CBCentralManager) {

    var consoleMsg = "hello"

    switch(central.state) {

    case .PoweredOff:
        consoleMsg = "Bluetooth is powered off"

    case .PoweredOn:
        consoleMsg = "Bluetooth is powered on"
        manager.scanForPeripheralsWithServices(nil, options: nil)

    case .Resetting:
        consoleMsg = "Bluetooth is Resetting"

    case .Unauthorized:
        consoleMsg = "Bluetooth is Unauthorized"

    case .Unknown:
        consoleMsg = "Bluetooth is Unknown"            

    case .Unsupported:
        consoleMsg = "Bluetooth is Unsupported"

    }

    print("\(consoleMsg)")
}

func centralManager(central: CBCentralManager, didDiscoverPeripheral peripheral: CBPeripheral, advertisementData: [String : AnyObject], RSSI: NSNumber) {

    print("Discovered a peripheral \(peripheral)")
}

当我尝试运行上面的代码时，日志显示“蓝牙已打开”，仅此而已。它没有发现我的条形码扫描仪。我还确保条形码扫描器处于可发现模式。为什么我的代码没有发现附近的支持蓝牙的条码扫描器？我在上面的代码中有什么错误吗？

谢谢

Answer 1

您绝对应该先检查授权!