如果您的Bluetooth BLE设备无法连接,请参考以下代码示例:
首先,您需要重置Central Manager:
centralManager = CBCentralManager(delegate: self, queue: nil, options: [CBCentralManagerOptionRestoreIdentifierKey: "centralManagerIdentifier"])
if centralManager.state == .poweredOn {
centralManager.stopScan()
centralManager.scanForPeripherals(withServices: [serviceUUID], options: [CBCentralManagerScanOptionAllowDuplicatesKey: true])
} else {
print("Bluetooth is not available.")
}
接下来,您需要实现CBCentralManagerDelegate协议中的以下几个方法:
func centralManagerDidUpdateState(_ central: CBCentralManager) {
switch central.state {
case .unknown:
print("Central state is unknown")
case .resetting:
print("Central state is resetting")
case .unsupported:
print("Central state is unsupported")
case .unauthorized:
print("Central state is unauthorized")
case .poweredOff:
print("Central state is powered off")
case .poweredOn:
print("Central state is powered on")
centralManager.stopScan()
centralManager.scanForPeripherals(withServices: [serviceUUID], options: [CBCentralManagerScanOptionAllowDuplicatesKey: true])
}
}
func centralManager(_ central: CBCentralManager, didDiscover peripheral: CBPeripheral, advertisementData: [String : Any], rssi RSSI: NSNumber) {
//连接操作
}
func centralManager(_ central: CBCentralManager, didConnect peripheral: CBPeripheral) {
//连接成功后的操作
}
func centralManager(_ central: CBCentralManager, didFailToConnect peripheral: CBPeripheral, error: Error?) {
//连接失败后的操作
}
func centralManager(_ central: CBCentralManager, didDisconnectPeripheral peripheral: CBPeripheral, error: Error?) {
//连接断开后的操作
}
在上述方法中,您需要实现'连接操作”中初始化/发现服务、特征和描述符,并连接到设备。如果连接成功,didConnectPeripheral将被调用并执行连接后的操作。如果连接失败,didFailToConnect将被调用并执行连接失败后的操作。如果连接断开,didDisconnectPeripheral将被调用并执行连接断开后的操作。
请注意在连接设备时需在info.plist文件中添加'Privacy - Bluetooth Peripheral Usage Description”权限。
希望这些代码示例可以帮助您解决Bluetooth BLE无法连接的问题。