shared.data(from: imageURL) // 网络请求后检查取消,以防止开始我们繁重的图像操作。 try Task.checkCancellation() let image = UIImage(data: imageData) // 由于任务未取消,因此执行返回图像操作。 return image } 在可以很容易的掌控任务的取消,这使得我们很容易犯错误和进行不必要的工作。在执行任务时,请...
suspend fun greetingAsync(): String {throwIllegalArgumentException("error from Kotlin")return"Hello, ${Platform().platform}"} 这样在 Swift 调用时也可以直接捕获到这个异常: //swiftdo{ print(tryawaitGreeting().greetingAsync()) }catch{ print(error) } 程序输出如下: Error Domain=KotlinException Code...
Action>{Reduce{state,actioninswitchaction{caselet.insert(value):return.run{_inawaitdatabase.insert(value)}caselet.delete(value):return.run{_inawaitdatabase.delete(value)}}} 如果
// 函数funcgreet(person:String) ->String{letgreeting="Hello, "+person+"!"returngreeting }funcgreet(person:String,fromhometown:String) ->String{return"Hello\(person)! Glad you could visit from\(hometown)."}print(greet(person:"Bill", from:"Cupertino"))// 打印“Hello Bill! Glad you could ...
If you want to read the return value from a Task directly, you should read its value using await, or use try await if it has a throwing operation. However, all tasks also have a result property that returns an instance of Swift’s Result struct, generic over the type returned by the ...
// kotlin @Throws(Throwable::class) suspend fun greetingAsync(): String { throw IllegalArgumentException("error from Kotlin") return "Hello, ${Platform().platform}" } 这样在 Swift 调用时也可以直接捕获到这个异常: //swift do { print(try await Greeting().greetingAsync()) } catch { print(...
addTask { return try await URLSession.shared .data(from: url, delegate: nil) .0 } } // taskgroup遵循AsyncSequence所以我们可以遍历它,这里我们使用reduce将group中的data转为image并返回 return try await group.reduce(into: [UIImage]()) { result, data in if let image = UIImage(data: data)...
) return } guard let responseToken = jsonDictonary["access_token"] as? String else { onFailure("Error retrieving token from JSON response.") return } responseTokenString = responseToken onSuccess(responseTokenString) } task.resume() } /// Returns the text string after it has been...
() }returntrue}funcapplicationWillResignActive(_application: UIApplication){// Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits ...
If your app communicates with one or more web services that do not return a single, consistent representation of a model object, consider implementing several initializers to handle each of the possible representations. In the example above, each of the values are extracted into constants from the...