CoreBluetooth广告无法启动-Java 学习之路

我正在尝试编写一个简单的应用程序，即使应用程序未处于活动状态，也会不断广播'beacon' . 我知道使用 CoreLocation 将在应用程序未使用时将其关闭，因此我尝试使用 Core Bluetooth 构建解决方案 . 麻烦的是我无法让应用程序开始做广告 .

import UIKit
import CoreBluetooth

class ViewController: UIViewController, CBCentralManagerDelegate, CBPeripheralManagerDelegate {

    var centralManager:CBCentralManager = CBCentralManager()
    var peripheralManager:CBPeripheralManager = CBPeripheralManager()
    let uuid:CBUUID = CBUUID(string: "DCEF54A2-31EB-467F-AF8E-350FB641C97B")

    override func viewDidLoad() {
        super.viewDidLoad()
        self.peripheralManager = CBPeripheralManager(delegate: self, queue: nil)
        self.centralManager.delegate = self
        let advertisingData = [CBAdvertisementDataLocalNameKey:"my-peripheral", CBAdvertisementDataServiceUUIDsKey: uuid]
        peripheralManager.startAdvertising(advertisingData)
        centralManager.scanForPeripheralsWithServices([uuid], options: nil)
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    func peripheralManagerDidStartAdvertising(peripheral: CBPeripheralManager, error: NSError?) {
        print("started advertising")
        print(peripheral)
    }

    func centralManager(central: CBCentralManager, didDiscoverPeripheral peripheral: CBPeripheral, advertisementData: [String : AnyObject], RSSI: NSNumber) {
        print("peripheral discovered")
        print("peripheral: \(peripheral)")
        print("RSSI: \(RSSI)")
    }

    func centralManagerDidUpdateState(central: CBCentralManager) {
        print("central state updated")
        print(central.description)
        if central.state == .PoweredOff {
            print("bluetooth is off")
        }
        if central.state == .PoweredOn {
            print("bluetooth is on")
            let advertisingData = [CBAdvertisementDataLocalNameKey:"my-peripheral", CBAdvertisementDataServiceUUIDsKey: uuid]
            let service = CBMutableService(type: uuid, primary: true)
            self.peripheralManager.addService(service)
            peripheralManager.startAdvertising(advertisingData)
            centralManager.scanForPeripheralsWithServices(nil, options: nil)
        }
        if central.state == .Unsupported {
            print("bluetooth is unsupported on this device")
        }
    }

    func peripheralManagerDidUpdateState(peripheral: CBPeripheralManager) {
        print("peripheral state updated")
        print("\(peripheral.description)")
    }

}

我已经在两台设备上安装了这个，问题似乎在于广告的传输，因为 peripheralManagerDidStartAdvertising() 永远不会被调用 .

1 回答

如果使用此init方法，则centralManagerDidUpdateState将起作用 . 如果要连续查看信标，可以设置CBCentralManagerScanOptionAllowDuplicatesKey选项 .

import UIKit
import CoreBluetooth

class ViewController: UIViewController, CBCentralManagerDelegate, CBPeripheralManagerDelegate {

var centralManager:CBCentralManager!
var peripheralManager:CBPeripheralManager = CBPeripheralManager()
let uuid:CBUUID = CBUUID(string: "DCEF54A2-31EB-467F-AF8E-350FB641C97B")

override func viewDidLoad() {
    super.viewDidLoad()
    self.peripheralManager = CBPeripheralManager(delegate: self, queue: nil)
    self.centralManager = CBCentralManager(delegate: self, queue: nil)
    let advertisingData = [CBAdvertisementDataLocalNameKey:"my-peripheral", CBAdvertisementDataServiceUUIDsKey: uuid]
    peripheralManager.startAdvertising(advertisingData)
    centralManager.scanForPeripheralsWithServices([uuid], options: [ CBCentralManagerScanOptionAllowDuplicatesKey : true])
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

func peripheralManagerDidStartAdvertising(peripheral: CBPeripheralManager, error: NSError?) {
    print("started advertising")
    print(peripheral)
}


func centralManager(central: CBCentralManager, didDiscoverPeripheral peripheral: CBPeripheral, advertisementData: [String : AnyObject], RSSI: NSNumber) {
    print("peripheral discovered")
    print("peripheral: \(peripheral)")
    print("advertisement: \(advertisementData)")
    if let data = advertisementData["kCBAdvDataServiceData"] {
        print("found advert data: \(data)")
    }
    print("RSSI: \(RSSI)")
}

func startAdvert(){
    let advertisingData = [CBAdvertisementDataLocalNameKey:"my-peripheral", CBAdvertisementDataServiceUUIDsKey: uuid]
    peripheralManager.startAdvertising(advertisingData)
}

func centralManager(central: CBCentralManager, didDisconnectPeripheral peripheral: CBPeripheral, error: NSError?) {
    print("peripheral disconnected")
    print("peripheral: \(peripheral)")
}

func centralManagerDidUpdateState(central: CBCentralManager) {
    print("central state updated")
    print(central.description)
    if central.state == .PoweredOff {
        print("bluetooth is off")
    }
    if central.state == .PoweredOn {
        print("bluetooth is on")
        centralManager.scanForPeripheralsWithServices(nil, options: [ CBCentralManagerScanOptionAllowDuplicatesKey : true])
        startAdvert()
    }
    if central.state == .Unsupported {
        print("bluetooth is unsupported on this device")
    }
}

func peripheralManagerDidUpdateState(peripheral: CBPeripheralManager) {
    print("peripheral state updated")
    print("\(peripheral.description)")
}

}

回复于 2024-04-19T08:10:25+08:00

CoreBluetooth广告无法启动

1 回答

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