我想制作应用程序,这将允许我从外围设备下载一些数据。我可以连接外围设备,但我无法下载此设备支持的服务。我没有第二个应用程序作为外围设备。第二个设备是iPad,它有一个用LightBlue.app制作的虚拟外围设备。有时它被称为空白,有时它被称为iPad,我不知道为什么。
这是我的代码:
import UIKit
import CoreBluetooth
class ViewController: UIViewController, CBCentralManagerDelegate{
@IBOutlet var coreBluetooth: UILabel!
@IBOutlet var discoveredDevices: UILabel!
@IBOutlet var foundBLE: UILabel!
@IBOutlet var connected: UILabel!
var centralManager:CBCentralManager!
var blueToothReady = false
var connectingPeripheral:CBPeripheral!
override func viewDidLoad() {
super.viewDidLoad()
startUpCentralManager()
}
func startUpCentralManager() {
centralManager = CBCentralManager(delegate: self, queue: nil)
}
func discoverDevices() {
centralManager.scanForPeripheralsWithServices(nil, options: nil)
}
func centralManager(central: CBCentralManager!, didDiscoverPeripheral peripheral: CBPeripheral!, advertisementData: (NSDictionary), RSSI: NSNumber!) {
discoveredDevices.text = "Discovered \(peripheral.name)"
println("Discovered: \(peripheral.name)")
centralManager.stopScan()
if peripheral.name == "iPad" || peripheral.name == "Blank"
{
println("ok")
centralManager.connectPeripheral(peripheral, options: nil)
self.connectingPeripheral = peripheral
}
}
func centralManagerDidUpdateState(central: CBCentralManager!) { //BLE status
switch (central.state) {
case .PoweredOff:
coreBluetooth.text = "CoreBluetooth BLE hardware is powered off"
case .PoweredOn:
coreBluetooth.text = "CoreBluetooth BLE hardware is powered on and ready"
blueToothReady = true;
case .Resetting:
coreBluetooth.text = "CoreBluetooth BLE hardware is resetting"
case .Unauthorized:
coreBluetooth.text = "CoreBluetooth BLE state is unauthorized"
case .Unknown:
coreBluetooth.text = "CoreBluetooth BLE state is unknown"
case .Unsupported:
coreBluetooth.text = "CoreBluetooth BLE hardware is unsupported on this platform"
}
if blueToothReady {
discoverDevices()
}
}
func centralManager(central: CBCentralManager!,didConnectPeripheral peripheral: CBPeripheral!)
{
connectingPeripheral.discoverServices(nil)
println("Connected")
foundBLE.textColor = UIColor.redColor()
foundBLE.text = "Connected to: \(peripheral.name)"
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
@IBAction func scanBLE(sender: UIButton) {
centralManager.scanForPeripheralsWithServices(nil, options: nil)
}
func connectingPeripheral(peripheral: CBPeripheral!, didDiscoverServices error: NSError!)
{
println("Services \(connectingPeripheral.services)")
}
}
答案 0 :(得分:3)
您需要在func centralManager(central: CBCentralManager!,didConnectPeripheral peripheral: CBPeripheral!)
中将外围设备的委托设置为自己,以便在发现服务时接听回电 -
func centralManager(central: CBCentralManager!,didConnectPeripheral peripheral: CBPeripheral!)
{
connectingPeripheral.delegate=self
connectingPeripheral.discoverServices(nil)
println("Connected")
foundBLE.textColor = UIColor.redColor()
foundBLE.text = "Connected to: \(peripheral.name)"
}
然后,您将回到func connectingPeripheral(peripheral: CBPeripheral!, didDiscoverServices error: NSError!)
答案 1 :(得分:0)
swift 3
<div
*ngIf="((styleElement.first != 'Visual' && styleElement.first != 'Verbal')
|| (styleElement.first != 'Visual' && styleElement.second != 'Verbal')
|| (styleElement.first != 'Visual' && styleElement.third != 'Verbal'))"
>