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我试图通过BLE访问运动传感器（IMU传感器）。该结构是在一个视图控制器中连接/配对传感器，并修改其设置，然后在另一个视图控制器（它们不连续）访问和分析其输出数据。如何通过视图控制器访问蓝牙数据？在xcode
如何继续访问已连接到另一个视图控制器的传感器的数据？ Coredata不会很理想，因为它是实时呈现的，并且不需要原始数据来记录。我不能通过segue传递数据，因为它们不是连续的（它们通过不同的标签栏视图控制器访问）。
我发现一个链接，说可以将CBCentralManager等放入AppDelegate，然后它变成中央管理器属性（How to continue BLE activities onto next view controller）。这是做到这一点的正确方法吗？如果是这样，那么中央经理的哪一部分应该放入AppDelegate？
这是我的代码，包括搜索和建立蓝牙连接。
var cManager = CBCentralManager()
var peripheralManager = CBPeripheralManager()
func centralManagerDidUpdateState(central: CBCentralManager!) {
var message: String = ""
switch cManager.state {
case .PoweredOff:
println("CoreBluetooth BLE hardware is powered off")
let alertView = UIAlertController(title: "", message: "Please enable Bluetooth to start the measurement", preferredStyle: .Alert)
alertView.addAction(UIAlertAction(title: "OK", style: .Cancel, handler: nil))
presentViewController(alertView, animated: true, completion: nil)
break
case .PoweredOn:
println("CoreBluetooth BLE hardware is powered on and ready")
self.scanForWAX9(self)
break
case .Resetting:
println("CoreBluetooth BLE hardware is resetting")
break
case .Unauthorized:
println("CoreBluetooth BLE state is unauthorized")
break
case .Unknown:
println("CoreBluetooth BLE state is unknown")
break
case .Unsupported:
println("CoreBluetooth BLE hardware is unsupported on this platform")
break
default:
break
}
}
func centralManager(central: CBCentralManager!, didDiscoverPeripheral peripheral: CBPeripheral!, advertisementData: [NSObject : AnyObject]!, RSSI: NSNumber!) {
println(peripheral.name);
//************************************************************************************
// Add some specification for bluetooth device
//************************************************************************************
if (peripheral.name != nil) && (peripheral.name.rangeOfString("WAX9") != nil) {
central.connectPeripheral(peripheral, options: nil)
self.connectedPeripheral = peripheral
println("PERIPHERAL NAME: \(peripheral.name)\n AdvertisementData: \(advertisementData)\n RSSI: \(RSSI)\n")
println("UUID DESCRIPTION: \(peripheral.identifier.UUIDString)\n")
println("IDENTIFIER: \(peripheral.identifier)\n")
cManager.stopScan()
}
}
@IBOutlet var connectNotice: UILabel!
func centralManager(central: CBCentralManager!, didConnectPeripheral peripheral: CBPeripheral!) {
peripheral.delegate = self
peripheral.discoverServices(nil)
// self.connectedPeripheral = peripheral
connectNotice.text = "\(peripheral.name) connected."
connectNotice.textColor = UIColor.whiteColor()
connectNotice.backgroundColor = UIColor(red:0.03, green:0.37, blue:0.5, alpha:0.5)
cManager.stopScan()
println("Scanning stopped")
println("Connected to peripheral")
}
// Alert message when fail to connect, e.g. when sensor goes out of range
func centralManager(central: CBCentralManager!, didFailToConnectPeripheral peripheral: CBPeripheral!, error: NSError!) {
println("FAILED TO CONNECT \(error)")
let alertView = UIAlertController(title: "", message: "Failed to connect.", preferredStyle: .Alert)
alertView.addAction(UIAlertAction(title: "OK", style: .Cancel, handler: nil))
presentViewController(alertView, animated: true, completion: nil)
self.disconnect()
}
// Start to scan for sensor when disconnected
func centralManager(central: CBCentralManager, didDisconnectPeripheral peripheral: CBPeripheral, error: NSError?) {
println("Disconnected from peropheral")
let alertView = UIAlertController(title: "", message: "The connection is stopped.", preferredStyle: .Alert)
alertView.addAction(UIAlertAction(title: "OK", style: .Cancel, handler: nil))
presentViewController(alertView, animated: true, completion: nil)
self.connectedPeripheral = nil
if scanAfterDisconnecting {
scanForWAX9(self)
}
}
func peripheralManagerDidUpdateState(peripheral: CBPeripheralManager!) {
switch peripheralManager.state {
case .PoweredOff:
println("Peripheral - CoreBluetooth BLE hardware is powered off")
break
case .PoweredOn:
println("Peripheral - CoreBluetooth BLE hardware is powered on and ready")
break
case .Resetting:
println("Peripheral - CoreBluetooth BLE hardware is resetting")
break
case .Unauthorized:
println("Peripheral - CoreBluetooth BLE state is unauthorized")
break
case .Unknown:
println("Peripheral - CoreBluetooth BLE state is unknown")
break
case .Unsupported:
println("Peripheral - CoreBluetooth BLE hardware is unsupported on this platform")
break
default:
break
}
}
func peripheral(peripheral: CBPeripheral!, didDiscoverServices error: NSError!) {
if (error != nil) {
println("ERROR: \(error)")
disconnect()
return
}
for service in peripheral.services
{
NSLog("Discovered service: \(service.UUID)")
peripheral.discoverCharacteristics(nil, forService: service as CBService)
}
}
背后的想法把CBCentralManager作为AppDelegate中可访问的属性，是使用AppDelegate是sharedInstance（单例模式）的事实。 但是这给了AppDelegate太多无关的工作。让AppDelegate完成“AppDelegating”的工作。 为你自己创建一个Singleton（看看“Singleton + Swift”），它将管理你所有的BLE的东西。 – Larme
非常感谢！ – Mushroomcloud