didDiscoverPeripheral“无法构建”错误

我不确定为什么这段代码无法构建，错误消息似乎非常神秘。

码：

var centralManager: CBCentralManager!; var nrf8001Peripheral: CBPeripheral!; override func viewDidLoad() { super.viewDidLoad() // Do any additional setup after loading the view, typically from a nib. // initialize centralManager self.centralManager = CBCentralManager(delegate: self, queue: nil); // start scanning for device self.centralManager.scanForPeripheralsWithServices([UART_SERVICE_UUID], options:nil); } func centralManager(central: CBCentralManager!, didDiscoverPeripheral peripheral: CBPeripheral!, advertisementData advertisementData: [NSObject : AnyObject]!, RSSI RSSI: NSNumber) { //print out the name of the scanned peripheral print("Discovered \(peripheral.name)") //print out the UUID of the scanned peripheral print("NSUUID string \(peripheral.identifier.UUIDString)") //stop scanning when found self.centralManager.stopScan() //connect when found self.centralManager.connectPeripheral(peripheral, options:nil); } 

我从XCode编译器收到的错误是：

“Objective-C方法”centralManager：didDiscoverPeripheral：advertisementData：RSSI：’由方法’centralManager（ ：didDiscoverPeripheral：advertisementData：RSSI :)提供’与可选的需求方法’centralManager（ ：didDiscoverPeripheral：advertisementData：RSSI :)’in protocol’ 冲突 CBCentralManagerDelegate’”

通过查看CoreBluetooth文档，似乎方法语法和参数是正确的，参数的可选性直接从规格表中复制： https ： //developer.apple.com/library/ios/documentation/CoreBluetooth/参考/ CBCentralManagerDelegate_Protocol /＃// apple_ref / occ / intfm / CBCentralManagerDelegate / centralManager：didDiscoverPeripheral：advertisementData：RSSI ：

任何帮助，将不胜感激！ 谢谢

根据评论：

1. 使用XCode 7 beta

2. 当我将函数声明更改为：

   func centralManager（中央：CBCentralManager，didDiscoverPeripheral peripheral：CBPeripheral，advertisementData advertisementData：[NSObject：AnyObject]，RSSI RSSI：NSNumber）

我仍然得到相同的构建错误。

3. 我的centralManagerDidUpdateState：方法是

    func centralManagerDidUpdateState(central: CBCentralManager) { print("centralManagerDidUpdateState:"); switch (central.state) { case .PoweredOff: print("CBCentralManagerStatePoweredOff"); case .Resetting: print("CBCentralManagerStateResetting"); case .PoweredOn: print("CBCentralManagerStatePoweredOn"); //scan for peripheral devices self.centralManager.scanForPeripheralsWithServices([UART_SERVICE_UUID], options:nil); case .Unauthorized: print("CBCentralManagerStateUnauthorized"); case .Unsupported: print("CBCentralManagerStateUnsupported"); default: print("CBCentralManagerStateUnknown"); } } 

Answer 1

感谢你的建议; 我最终通过XCode 7文档找到了答案。 以下函数的XCode 6语法如下：

 func centralManagerDidUpdateState(central: CBCentralManager!) {} func centralManager(central: CBCentralManager!, didDiscoverPeripheral peripheral: CBPeripheral!, advertisementData advertisementData: [NSObject : AnyObject]!, RSSI RSSI: NSNumber) {} func centralManager(central: CBCentralManager!, didConnectPeripheral peripheral: CBPeripheral!) {} func centralManager(central: CBCentralManager!, didDisconnectPeripheral peripheral: CBPeripheral!, error: NSError!) {} func peripheral(peripheral: CBPeripheral!, didDiscoverServices error: NSError!) {} func peripheral(peripheral: CBPeripheral!, didDiscoverCharacteristicsForService service: CBService!, error: NSError!) {} func peripheral(peripheral: CBPeripheral!, didUpdateNotificationStateForCharacteristic characteristic: CBCharacteristic!, error: NSError!) {} func peripheral(peripheral: CBPeripheral!, didUpdateValueForCharacteristic characteristic: CBCharacteristic!, error: NSError!) {} 

但是，这些函数将与XCode 7 CoreBluetooth库声明冲突。

请注意选项和数据类型的不同用法。

（XCode 6） error:NSError! vs. （XCode 7） error:NSError?

（XCode 6） advertisementData : [NSObject : AnyObject]! vs. （XCode 7） advertisementData [String : AnyObject]

XCode 7 beta的相应函数声明实际上如下：

 func centralManagerDidUpdateState(central: CBCentralManager) {} func centralManager(central: CBCentralManager, didDiscoverPeripheral peripheral: CBPeripheral, advertisementData: [String : AnyObject], RSSI: NSNumber) {} func centralManager(central: CBCentralManager, didConnectPeripheral peripheral: CBPeripheral) {} func centralManager(central: CBCentralManager, didFailToConnectPeripheral peripheral: CBPeripheral, error: NSError?) {} func peripheral(peripheral: CBPeripheral, didDiscoverServices error: NSError?) {} func peripheral(peripheral: CBPeripheral, didDiscoverCharacteristicsForService service: CBService, error: NSError?) {} func peripheral(peripheral: CBPeripheral, didUpdateValueForCharacteristic characteristic: CBCharacteristic, error: NSError?) {} func peripheral(peripheral: CBPeripheral, didUpdateNotificationStateForCharacteristic characteristic: CBCharacteristic, error: NSError?) {} func centralManager(central: CBCentralManager, didDisconnectPeripheral peripheral: CBPeripheral, error: NSError?) {} 

希望这对有同样问题的其他人有帮助！