didReadRSSI在iOS上调用,但在OS X上调用

2023年11月13日 254次阅读

我正在尝试编写一个OS X客户端,可以频繁更新蓝牙外设的RSSI值.

我的客户端应用程序正在找我的iPhone设备,我正在运行一个广告蓝牙服务的测试应用程序.客户端应用程序有一个计时器,导致每3秒执行一次peripheral.readRSSI().

在OS X上运行时,我没有成功调用didReadRSSI,但是当我在iOS上运行完全相同的Swift代码时,它运行正常.

在iOS 9.3上 – 使用有效的RSSI值按预期调用didReadRSSI.

在OS X 10.11.4上 – 永远不会调用didReadRSSI.

我在iOS和OS X上运行以下完全相同的Swift代码：

import Foundation
import CoreBluetooth

class SampleClient:NSObject, CBCentralManagerDelegate, CBPeripheralDelegate {

var manager: CBCentralManager!
var peripheral: CBPeripheral!
var characteristic: CBCharacteristic!
var readRSSITimer: NSTimer!

override init() {
    super.init()
    self.manager = CBCentralManager(delegate: self, queue: nil)
}

func centralManagerDidUpdateState(central: CBCentralManager) {
    if self.manager.state == .PoweredOn {
        self.manager.scanForPeripheralsWithServices(nil, options: nil)
    }
}

func centralManager(central: CBCentralManager, didDiscoverPeripheral peripheral: CBPeripheral, advertisementData: [String : AnyObject], RSSI: NSNumber) {
    if let name = peripheral.name {
        print(name)
        self.peripheral = peripheral
        self.manager.connectPeripheral(self.peripheral, options:
            [CBConnectPeripheralOptionNotifyOnDisconnectionKey : true])
    }
}

func centralManager(central: CBCentralManager, didConnectPeripheral peripheral: CBPeripheral) {
    peripheral.readRSSI()
    self.startReadRSSI()
    peripheral.delegate = self
    peripheral.discoverServices(nil)
}

func centralManager(central: CBCentralManager, didDisconnectPeripheral peripheral: CBPeripheral, error: NSError?) {
    self.stopReadRSSI()
    if self.peripheral != nil {
        self.peripheral.delegate = nil
        self.peripheral = nil
    }
}

func centralManager(central: CBCentralManager, didFailToConnectPeripheral aPeripheral: CBPeripheral, error: NSError?) {
    if self.peripheral != nil {
        self.peripheral.delegate = nil
        self.peripheral = nil
    }
}

func disconnect() {
    if self.characteristic != nil {
        self.peripheral.setNotifyValue(false, forCharacteristic: self.characteristic)
    }
    if self.peripheral != nil {
        self.manager.cancelPeripheralConnection(self.peripheral)
    }
}

func stopScan() {
    self.manager.stopScan()
}

func peripheral(peripheral: CBPeripheral, didDiscoverServices error: NSError?) {
    for service: CBService in peripheral.services! {
        peripheral.discoverCharacteristics(nil, forService: service)
    }
}

func peripheral(peripheral: CBPeripheral, didReadRSSI RSSI: NSNumber, error: NSError?) {
    print("RSSI = \(RSSI)")
}

func readRSSI() {
    if (self.peripheral != nil) {
        self.peripheral.delegate = self
        print("RSSI Request - \(peripheral.name!)")
        self.peripheral.readRSSI()
    } else {
        print("peripheral = nil")
    }
}

func startReadRSSI() {
    if self.readRSSITimer == nil {
        self.readRSSITimer = NSTimer.scheduledTimerWithTimeInterval(3.0, target: self, selector: #selector(SampleClient.readRSSI), userInfo: nil, repeats: true)
    }
}

func stopReadRSSI() {
    if (self.readRSSITimer != nil) {
        self.readRSSITimer.invalidate()
        self.readRSSITimer = nil
    }
}

}

在iOS上运行时的输出是：

iPhone
RSSI = -38
RSSI Request - iPhone
RSSI = -44
RSSI Request - iPhone
RSSI = -45

在OS X上运行时的输出是：

My iPhone 6
RSSI Request - My iPhone 6
RSSI Request - My iPhone 6

请注意,返回的外围设备名称在两个平台上是不同的.我不知道这是否重要.

如何在OS X上调用didReadRSSI？

最佳答案 OSX使用较旧的样式,将其添加到您的类中以获得预期的行为.

func peripheralDidUpdateRSSI(peripheral: CBPeripheral!, error: NSError!) {
    print("peripheralDidUpdateRSSI \(peripheral.name!) = \(peripheral.RSSI)")
}
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