(Swift 3,4,5...) Get the LastErrorText for an Asynchronous Method Call

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Demonstrates how to get the LastErrorText information for a Chilkat method called asynchronously.

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func chilkatTest() {
    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    let socket = CkoSocket()!

    // The Async call simply creates the task.  The "Connect" method has not yet been called.
    var maxWaitMs: Int = 5000
    // Let's intentionally cause this connect to fail by giving it an invalid domain..
    var task: CkoTask? = socket.connectAsync("amazonbladflakjsdflksadjf.com", port: 443, ssl: true, maxWaitMs: maxWaitMs)
    if socket.lastMethodSuccess == false {
        print("\(socket.lastErrorText!)")
        return
    }

    // Start the background thread to run the task.
    var success: Bool = task!.run()
    if !success {
        print("\(task!.lastErrorText!)")
        task = nil
        return
    }

    // The application is now free to do anything else

    // For this example, we'll simply sleep and periodically
    // check to see if the Socket Connect if finished.
    while task!.finished != true {
        // Sleep 1 ms.
        task!.sleepMs(1)
    }

    // If the task completed, it means the method (in this case the Connect method) was called and returned success or failure.
    if task!.statusInt.intValue != 7 {
        print("Task did not complete.")
        print("task status: \(task!.status!)")
        task = nil
        return
    }

    // Get the success/failure of the Connect
    // (This is the return value of the Connect method had it been called synchronously)
    success = task!.getResultBool()
    if success == false {
        // Get the LastErrorText for the Connect method call.
        // Had we called Connect synchronously, we would've simply accessed the socket object's LastErrorText property.
        // Instead, we get the task object's ResultErrorText.
        print("\(task!.resultErrorText!)")
    }
    else {
        print("Connect succeeded.")
    }

    task = nil

}