AsynchronousOperation

open class AsynchronousOperation : Operation, ProgressReporting

An abstract thread safe subclass of Operation to support asynchronous operations.

Subclasses must override main to perform any work and, if they are asynchronous, call the finish() method to complete the execution.

Public Properties

  • The progress property represents a total progress of the operation during its execution.

    Declaration

    Swift

    @objc
public final lazy private(set) var progress: Progress { get set }

  • Undocumented

    Declaration

    Swift

    open override var isReady: Bool { get }

  • Undocumented

    Declaration

    Swift

    public final override var isExecuting: Bool { get }

  • Undocumented

    Declaration

    Swift

    public final override var isFinished: Bool { get }

  • Undocumented

    Declaration

    Swift

    public final override var isAsynchronous: Bool { get }

  • Undocumented

    Declaration

    Swift

    public final override var isConcurrent: Bool { get }

Foundation.Operation

  • Undocumented

    Declaration

    Swift

    public final override func start()

Public Methods

  • The default implementation of this method does nothing. You should override this method to perform the desired task. In your implementation, do not invoke super. This method will automatically execute within an autorelease pool provided by Operation, so you do not need to create your own autorelease pool block in your implementation.

    Note

    Once the task is finished you must call finish() to complete the execution.

    Declaration

    Swift

    open override func main()

  • Finishes the operation.

    Important

    You should never call this method outside the operation main() execution scope.

    Declaration

    Swift

    public func finish()

  • Undocumented

    Declaration

    Swift

    open override func cancel()

Debug

  • Undocumented

    Declaration

    Swift

    open override var description: String { get }

  • Undocumented

    Declaration

    Swift

    open override var debugDescription: String { get }