迅捷:与蓝牙设备配对，单击按钮即可 [英] swift: pair with bluetooth device with button click
问题描述
直到现在，当打开应用程序时，iPhone已与蓝牙设备配对，但我想与按钮单击配对.我试图将所有扫描和连接功能放在IBAction中，但是当我按下按钮时什么也没有发生.在IBAction之后的第一个函数中，我有一个打印输出来检查它是否进入了该函数，但是我没有得到打印.我还尝试在manager.scanForPeripherals之后添加延迟，但也没有起作用.我在这里想念什么?有人知道吗? 感谢您的任何答复！这是我的代码(没有延迟):
Until now the iPhone has paired to a bluetooth device when the app is opened, but I want to pair with a button click instead. I tried to put all the scanning and connection functions in a IBAction, but nothing happens when I push the button. In the first function after the IBAction I have a print output to check if it even enters the function, but I don't get the print. I also tried to put a delay after the manager.scanForPeripherals but didn't work either. What am I missing here? anyone know? Thanks for any replies! here is my code (without the delay):
var manager: CBCentralManager!
var device: CBPeripheral?
var characteristics: [CBCharacteristic]?
var serviceUUID = "1234"
var char1 = "FFE1"
let deviceName = "HMSoft"
var connected = CBPeripheralState.connected
var disconnected = CBPeripheralState.disconnected
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
manager = CBCentralManager(delegate: self, queue: nil)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func centralManagerDidUpdateState(_ central: CBCentralManager) {
switch central.state {
case .poweredOn: break
// manager.scanForPeripherals(withServices: nil, options: nil)
case .unknown: break
case .resetting: break
case .unsupported: break
case .unauthorized: break
case .poweredOff:
break
}
}
@IBAction func connectBluetooth(_ sender: Any) {
manager.scanForPeripherals(withServices: nil, options: nil)
func centralManager(_ central: CBCentralManager, didDiscover peripheral: CBPeripheral, advertisementData: [String : Any], rssi RSSI: NSNumber) {
if let peripheralName = advertisementData[CBAdvertisementDataLocalNameKey] as? String {
if peripheralName == self.deviceName {
// save a reference to the sensor tag
self.device = peripheral
self.device!.delegate = self
// Request a connection to the peripheral
self.manager.connect(self.device!, options: nil)
print("Check")
}
}
}
func centralManager(_ central: CBCentralManager, didConnect peripheral: CBPeripheral) {
peripheral.discoverServices(nil)
}
func peripheral(_ peripheral: CBPeripheral, didDiscoverServices error: Error?) {
if error != nil {
return
}
if let services = peripheral.services {
for service in services {
if (service.uuid == CBUUID(string: serviceUUID)) {
peripheral.discoverCharacteristics(nil, for: service)
}
}
}
}
func peripheral(_ peripheral: CBPeripheral, didDiscoverCharacteristicsFor service: CBService, error: Error?) {
device = peripheral
characteristics = service.characteristics
}
func centralManager(_ central: CBCentralManager, didFailToConnect peripheral: CBPeripheral, error: Error?) {
if error != nil {
return
}
}
}
推荐答案
初始化CBCentralManager并将其设置为delegate时，委托将开始接收事件.
When you initialise the CBCentralManager and set its delegate, the delegate will start receiving events.
因此，如果您只希望在用户轻按按钮后才激活CBCentralManager，而不是在屏幕加载后立即激活，则要做的最少工作就是从以下位置移动初始化manager的代码: viewDidLoad进行按钮操作.
So, if you only want the CBCentralManager to be active once the user has tapped a button, rather than as soon as the screen loads, the minimum you have to do is move the code that initialises the manager from viewDidLoad to the button action.
所以:
将manager = CBCentralManager(delegate: self, queue: nil)从viewDidLoad移动到@IBAction func connectBluetooth(_ sender: Any)，
从IBAction中删除对scanForPeripherals的呼叫，并且;
Remove the call to scanForPeripherals from the IBAction, and;
取消注释centralManagerDidUpdateState中的// manager.scanForPeripherals(withServices: nil, options: nil).
这篇关于迅捷:与蓝牙设备配对，单击按钮即可的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
