我正在编写一个应用程序,该应用程序允许我通过BLE将图像发送到其他人的应用程序。
为了正确测试它,我需要能够连接到设备,但是我扫描的外围设备始终断开连接,并且值为零。我不确定我是否在这样做。我一直在阅读指南,并且遵循正确的程序,所以有人可以指出我可能做错了什么吗?我正在检测哪些外围设备?
输出:
<CBPeripheral: 0x165b9c90, identifier = 6B74A074-6F5B-0E3A-94EB-6E7BB890569C, name = (null), state = disconnected>
<CBPeripheral: 0x165a0940, identifier = A35AC32E-5668-BD0D-4DBC-D4BF959B9242, name = (null), state = disconnected>
<CBPeripheral: 0x166a8220, identifier = 4D9FA1A1-0090-465F-B53D-363B0F3BBD27, name = (null), state = disconnected>
编辑:添加了更多代码
这是我的代码
import Foundation
import CoreBluetooth
import UIKit
class BluetoothController: UITableViewController, CBCentralManagerDelegate, CBPeripheralManagerDelegate, CBPeripheralDelegate {
var centralManager: CBCentralManager!
var peripheralManager: CBPeripheralManager!
var service : CBMutableService!
let uuid:CBUUID = CBUUID(string: "09d921ff-b80c-47b1-bc2b-5bbaadf62010")
let charaUuid:CBUUID = CBUUID(string: "09d921ff-b80c-47b1-bc2b-5bbaadf62021")
override func viewDidLoad() {
print("Initialzing managers")
peripheralManager = CBPeripheralManager(delegate: self, queue: nil)
centralManager = CBCentralManager(delegate: self, queue: nil)
service = CBMutableService(type: uuid, primary: true) //<--Probably not causing it but without a service...
let properties: CBCharacteristicProperties = [.notify, .read, .write]
let permissions: CBAttributePermissions = [.readable, .writeable]
let characteristic = CBMutableCharacteristic(
type: charaUuid,
properties: properties,
value: nil,
permissions: permissions)
service.characteristics = [characteristic];
peripheralManager.add(service)
}
func peripheralManagerDidUpdateState(_ peripheral: CBPeripheralManager) {
print("peripheral state updated")
print("\(peripheral.description)")
}
func peripheralManagerDidStartAdvertising(_ peripheral: CBPeripheralManager, error: Error?)
{
print("started advertising")
}
// Check if the bluetooth is powered on
// Start looking for devices
func centralManagerDidUpdateState(_ central: CBCentralManager) {
if central.state == .poweredOn {
print("Scanning for devices")
centralManager.scanForPeripherals(withServices: nil, options: nil)
startAdvert()
} else {
print("Bluetooth not available.")
}
}
func startAdvert(){
let advertisingData = [CBAdvertisementDataLocalNameKey:"Test Device", CBAdvertisementDataServiceUUIDsKey: uuid] as [String : Any]
peripheralManager.startAdvertising(advertisingData)
}
func centralManager(_ central: CBCentralManager, didDiscover peripheral: CBPeripheral, advertisementData: [String : Any], rssi RSSI: NSNumber){
print(peripheral)
//didReadPeripheral(peripheral, rssi: RSSI)
}
}
最佳答案
正如Paulw11所指出的,您没有连接,因为您从未调用connect()
。您会发现周围的随机BLE设备与您的应用无关。那是因为您正在扫描所有可能的服务:
centralManager.scanForPeripherals(withServices: nil, options: nil)
您几乎永远都不要那样做。这对电池不利,而且很少是您想要的。您要扫描您的服务。
centralManager.scanForPeripherals(withServices: [uuid], options: nil)
然后,当您发现其他宣传您的服务的设备时,您需要连接到它们。