swift5.1

问题 Followed this it was working fine. But when I tried the same thing for resolving a nested dependency (Dependency injected class has a dependency in turn - NetworkService In our case), it crashed. What am I doing wrong here? any help would be highly appreciated. A realtime scenario class AppContainer { static let shared = AppContainer() var index: [Any] = [NetworkingLibrary(), NetworkService()] func resolve<T>(_ type: T.Type) -> T { return index.first(where: { $0 as? T != nil }) as! T } }

问题 Followed this it was working fine. But when I tried the same thing for resolving a nested dependency (Dependency injected class has a dependency in turn - NetworkService In our case), it crashed. What am I doing wrong here? any help would be highly appreciated. A realtime scenario class AppContainer { static let shared = AppContainer() var index: [Any] = [NetworkingLibrary(), NetworkService()] func resolve<T>(_ type: T.Type) -> T { return index.first(where: { $0 as? T != nil }) as! T } }

问题 I am new to swift and codable too. I have below codable. I am getting all response of API in "RecentResult". I want to check "data" is empty or not. How do I check it? struct RecentResult: Codable { let input: Input let commandResult: CommandResultClass } struct CommandResultClass: Codable { let success: Int let message: String let data: DataClass } struct DataClass: Codable { let recentCount: String enum CodingKeys: String, CodingKey { case recentCount = "RecentCount" } } To decode I am

问题 I am new to swift and codable too. I have below codable. I am getting all response of API in "RecentResult". I want to check "data" is empty or not. How do I check it? struct RecentResult: Codable { let input: Input let commandResult: CommandResultClass } struct CommandResultClass: Codable { let success: Int let message: String let data: DataClass } struct DataClass: Codable { let recentCount: String enum CodingKeys: String, CodingKey { case recentCount = "RecentCount" } } To decode I am

问题 I am new to swift and codable too. I have below codable. I am getting all response of API in "RecentResult". I want to check "data" is empty or not. How do I check it? struct RecentResult: Codable { let input: Input let commandResult: CommandResultClass } struct CommandResultClass: Codable { let success: Int let message: String let data: DataClass } struct DataClass: Codable { let recentCount: String enum CodingKeys: String, CodingKey { case recentCount = "RecentCount" } } To decode I am

问题 I'm figuring out Property Wrappers in Swift, but I seem to miss something. This is how I wrote a property wrapper for a dependency injection framework we use: @propertyWrapper struct Inject<Value> { var _value: Value var wrappedValue: Value { get { return _value } set { _value = newValue } } init(_ container: Container = AppContainer.shared) { do { _value = try container.resolve(Value.self) } catch let e { fatalError(e.localizedDescription) } } } But when I use it in my class like below, I

问题 After spending some time creating a @Debounced property wrapper I'm not happy with the readability of the code. To understand what's going on you really need to understand how a Property wrapper works and the concept of the wrappedvalue and projectedvalue. This is the Property Wrapper: @propertyWrapper class Debounced<Input: Hashable> { private var delay: Double private var _value: Input private var function: ((Input) -> Void)? private weak var timer: Timer? public init(wrappedValue: Input,

问题 App crashes with the following error message 2019-10-12 20:01:34.332334-0700 Awesome App[26368:3535170] [plugin] AddInstanceForFactory: No factory registered for id <CFUUID 0x600002903280> F8BB1C28-BAE8-11D6-9C31-00039315CD46 The breakpoint at crash seems to be related to AVAudioPlayer let path = Bundle.main.path(forResource: "menu_background.mp3", ofType:nil)! audioPlayer = try AwesomeAudioPlayer(contentsOf: URL(fileURLWithPath: path)) ---> breakpoint 回答1: I have found the solution in

问题 I am implementing BackgroundTasks Framework for updating the data. But I got the below issue Could not schedule refreshApp: Error Domain=BGTaskSchedulerErrorDomain Code=1 "(null)" Could not schedule data featch: Error Domain=BGTaskSchedulerErrorDomain Code=1 "(null)" 2019-10-01 19:19:32.550320+0530 SOBackgroundTask[34131:1129470] Can't end BackgroundTask: no background task exists with identifier 3 (0x3), or it may have already been ended. Break in UIApplicationEndBackgroundTaskError() to

问题 I have a problem getting the current UIScene when multiple scenes are connected. Specifically, my app (iOS 13) supports multiple windows on the iPad. When I have two windows side by side and I access the apps connected scenes (with UIApplication.shared.connectedScenes ), all of them have the activationState set to .foregroundActive . But I am actually only interacting with one of them. I found some code here on stackoverflow to retrieve the current key window (can't remember who it was that