连接到设备时CBCentralManager卡住了。
开始扫描后，它找到设备并到达centralManager：didDiscover：方法，然后尝试连接到它，但设备保持连接状态一段时间，然后断开连接。
通过重启设备上的蓝牙很容易解决，但这不是解决方案。有谁知道为什么会这样？
代码：
//MARK: CBCentralManagerDelegate methods
func centralManagerDidUpdateState(_ central: CBCentralManager) {
self.delegate?.centralServiceDidUpdateState(self)
guard let centralManager = self.centralManager else { return }
switch centralManager.state {
case .poweredOn: self.scan()
case .poweredOff: print("poweredOff")
case .resetting: print("resetting")
case .unauthorized: print("unauthorized")
case .unknown: print("unknown")
case .unsupported: print("unsupported")
}
}
func scan() {
self.centralManager?.scanForPeripherals(withServices: nil)
print("Scanning started")
}
func centralManager(_ central: CBCentralManager, didDiscover peripheral: CBPeripheral, advertisementData: [String : Any], rssi RSSI: NSNumber) {
self.delegate?.centralService(self, discover: peripheral.identifier.uuidString)
let retrievedPeripherals = central.retrievePeripherals(withIdentifiers: [])
for retrievedPeripheral in retrievedPeripherals {
central.connect(retrievedPeripheral, options: nil)
}
if !retrievedPeripherals.contains(peripheral) {
// And connect
self.discoveredPeripheral = peripheral
self.discoveredPeripheral?.delegate = self
central.stopScan()
central.connect(peripheral, options: nil)
self.rssis[peripheral.identifier.uuidString] = "\(RSSI)"
print("Connecting to peripheral \(peripheral)")
}
}
func centralManager(_ central: CBCentralManager, didFailToConnect peripheral: CBPeripheral, error: Error?) {
print("Failed to connect to \(peripheral). (\(error!.localizedDescription))")
}
func centralManager(_ central: CBCentralManager, didConnect peripheral: CBPeripheral) {
print("Peripheral Connected with identifier: \(peripheral.identifier.uuidString)")
self.discoveredPeripheral?.discoverServices(nil)
}
func peripheral(_ peripheral: CBPeripheral, didDiscoverServices error: Error?) {
print("Discover services for peripheralIdentifier: \(peripheral.identifier.uuidString)")
if let error = error {
print("Error discovering services: \(error.localizedDescription)")
return
}
// Loop through the newly filled peripheral.services array, just in case there's more than one.
for service in peripheral.services ?? [] {
peripheral.discoverCharacteristics(nil, for: service)
}
}
我也是从控制台登录的：
2017-05-21 21:09:32.049137 MyApp[5871:2645747] [Fabric] Unable to locate application icon
2017-05-21 21:09:32.051153 MyApp[5871:2645747] [Crashlytics] Version 3.8.4 (121)
Scanning started
self.peripheralManager powered on.
Connecting to peripheral <CBPeripheral: 0x1700f9100, identifier = B5E6ACBF-307C-4C13-BB6A-09F4A92ABEC3, name = (null), state = connecting>
问题是没有调用centralManager: didFailToConnect，而不调用centralManager: didConnect。
也许这个问题与null外围设备名称有某种关系？
更新＃1：
我添加了
DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + 10.0) {
print("Connecting to peripheral \(peripheral)")
}
我在控制台中得到了这个：
Connecting to peripheral <CBPeripheral: 0x1700f9100, identifier = B5E6ACBF-307C-4C13-BB6A-09F4A92ABEC3, name = (null), state = connecting>
10秒后外围仍然存在。所以这不是解除分配和强引用的问题。