CODEWITHSUNDEEP
iosxcodeswift
mosaic6
mosaic6

Reputation: 933

Function produces expected type '(() -> ())?'; did you mean to call it with '()'?

Function produces expected type '(() -> ())?'; did you mean to call it with '()'?

I am getting the above error. Auto fix from Xcode does not help.

The error is on self.performOnCommunicationQueue():

func getAuthParams(authClosure:((error:NSError?) -> ())?) {
    logDebug("Starting sync session with Max device")

    if let statusError = self.assertReady() {
        logError("Start sync session failed with error: \(statusError)")

        if (authClosure != nil) {
            authClosure!(error: statusError)
        }
    } else {
        self.performOnCommunicationQueue() {
            let error:NSError?

            // Set random starting byte
            let oAbsTime:[UInt64] = [mach_absolute_time()]
            let payload:NSData = NSData(bytes: oAbsTime, length: 8)
            let absTime:UInt8 = UnsafePointer<UInt8>(payload.bytes).memory
            self.randomCryptoByte = (0x01 | ( absTime & 0xfe))
    }
}

func sendAuthChallenge(authChal:String, completion:((error:NSError?) -> ())?) {
}

func performOnCommunicationQueue(closure:(()->())?){
    if (closure != nil)
    {
        self.communicationQueue?.addOperationWithBlock(closure!)
    }
}

Upvotes: 0

Views: 1789

Answers (1)

Tom Elliott
Tom Elliott

Reputation: 1926

I think this is what you want:

self.performOnCommunicationQueue({ () -> () in
    let error:NSError?
    // Set random starting byte
    let oAbsTime:[UInt64] = [mach_absolute_time()]
    let payload:NSData = NSData(bytes: oAbsTime, length: 8)
    let absTime:UInt8 = UnsafePointer<UInt8>(payload.bytes).memory
    self.randomCryptoByte = (0x01 | ( absTime & 0xfe))
})

This creates the void to void closure that performOnCommunicationQueue requires.

Also, check that your braces match up once you've made this change, I think you might be one short, which is why autocomplete wasn't a help.

Upvotes: 5

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