我有一个带有RestKit库和CoreData的iOS应用程序.从Xcode8开始,我可以看到比以前更多的日志,其中一个对我没有任何意义.
error: An observer of NSManagedObjectContextDidSaveNotification illegally threw an exception. Objects saved = {
inserted = "{(\n)}";
managedObjectContext = "<_PFWeakReference: 0x600000621560>";
updated = "{(\n ... )}";
}
and exception = [<_PFWeakReference 0x600000621560> valueForUndefinedKey:]: this class is not key value coding-compliant for the key @count. with userInfo = {
NSTargetObjectUserInfoKey = "<_PFWeakReference: 0x600000621560>";
NSUnknownUserInfoKey = "@count";
到目前为止,我能理解的是对managedObjectContext的弱引用(错误上面的内容)使用了错误的键,但我无法弄清楚如何调试它.
与此问题相关的所有NSManagedObjects似乎都是集合.主要来自OneToMany或ManyToMany关系的NSSet.
然后我发现了这个Apple文档:
除@count外,所有集合运算符都需要集合运算符右侧的键路径.
但是,我看不到当前使用此密钥的任何谓词或CoreData请求.
我重新生成了所有的NSManagedObject模型,并仔细检查它们之间的所有反向关系,但它没有帮助我摆脱它.
这个应用程序运行正常,但我找不到任何解决方案来删除此警告.
我有一个管理BTLE通信的BluetoothManager类.我可以扫描并连接到CBPeripheral并发现服务或特征.我有来自CBCentralManagerDelegate和CBPeripheralDelegate的良好回调
当我连接到CBPeripheral时,我在CoreData中保存UUIDString以在我重新启动应用程序时检索此外围设备.
这是我重新启动应用程序时检索外围设备的Swift代码:
func retrievePeripheralsWithIdentifiers(identifiers: [AnyObject]!){
let data = self.centralManager.retrievePeripheralsWithIdentifiers(identifiers)
println("Data retrieved: \(data)")
for peripheral in data as [CBPeripheral] {
println("Peripheral : \(peripheral)")
peripheral.delegate = self
centralManager.connectPeripheral(peripheral, options: nil)
}
}
这就是我所拥有的:
Data retrieved: [<CBPeripheral: 0x1669fcd0, identifier = XXXXX, name = Peripheral1, state = disconnected>]
Peripheral : <CBPeripheral: 0x1669fcd0, identifier = XXXXX, name = Peripheral1, state = disconnected>
我可以找到我的一个外围没有任何问题.但是当我调用"centralManager.connectPeripheral(peripheral,options:nil)"这一行时,我没有任何回复.
这些方法
func centralManager(central: CBCentralManager!, didRetrievePeripherals peripherals: [AnyObject]!)
func centralManager(central: CBCentralManager!, didConnectPeripheral peripheral: CBPeripheral!)
func centralManager(central: CBCentralManager!, didFailToConnectPeripheral peripheral: CBPeripheral!, error: NSError!) …我正在使用模式MVVM+Coordinator。我的每个控制器都是由coordinators. 但是，当点击Navigation控制器的后退按钮时，停止我的协调器的正确方法是什么？
class InStoreMainCoordinator: NavigationCoordinatorType, HasDisposeBag {
let container: Container
enum InStoreMainChildCoordinator: String {
case menu = "Menu"
case locations = "Locations"
}
var navigationController: UINavigationController
var childCoordinators = [String: CoordinatorType]()
init(navigationController: UINavigationController, container: Container) {
self.navigationController = navigationController
self.container = container
}
func start() {
let inStoreMainViewModel = InStoreMainViewModel()
let inStoreMainController = InStoreMainController()
inStoreMainController.viewModel = inStoreMainViewModel
navigationController.pushViewController(inStoreMainController, animated: true)
}
}