Optimize Data Sending/Querying to Parse Swift iOS

I have a swift method that I'm using to update Parse in the backend when the button is tapped. Votes are being updated: The method acts as a voting system, incrementing a label every time it's tapped. This action is happening in a Custom Cell:

@IBOutlet weak var votesLabel: UILabel!

    var parseObject:PFObject?
   @IBAction func happyBtn(sender: AnyObject) {

    if(parseObject != nil) {

        if var votes: Int? = parseObject!.objectForKey("votes") as? Int {

            votes!++
            parseObject!.setObject(votes!, forKey: "votes")
            parseObject!.saveInBackground()

          votesLabel?.text = "+\(votes!)"
            // print(votes)
        }

    }
}

Was wondering how I can optimize this function to send the data to and from Parse in the most efficient manner?

All help is appreciated!

I have some feedback concerning the usage of Swift optionals in
your code.

The main point is that there is far too much "forced unwrapping". The forced unwrap operator ! can and should be avoided
in most cases. Instead of comparing with nil and forced unwrapping

if (parseObject != nil) {
     parseObject!.doSomething()
     parseObject!.doSomethingElse()
}

use optional binding to test and get the unwrapped value:

if let theParseObject = parseObject {
     theParseObject.doSomething()
     theParseObject.doSomethingElse()
}

Or, if parseObject is expected to be non-nil when the method
is called (e.g. because it is set up in viewDidLoad), declare it
as an implicitly unwrapped optional

var parseObject : PFObject!
// ...
parseObject.doSomething()
parseObject.doSomethingElse()

There is no reason to declare var notes as an optional Int?.
With

if var votes = parseObject.objectForKey("votes") as? Int { ... }

you get rid of more forced unwrap operators.

Finally, the votesLabel textfield outlet is expected to be non-nil
(otherwise you did not connect it correctly in the interface builder).
That is the reason why it is declared as an implicitly unwrapped optional
UILabel!. There is no need for optional chaining in

votesLabel?.text = "+\(votes!)"

Putting it all together, the method should look like this:

@IBAction func happyBtn(sender: AnyObject) {

    if let theParseObject = self.parseObject {
        if var votes = theParseObject.objectForKey("votes") as? Int {
            votes++
            theParseObject.setObject(votes, forKey: "votes")
            theParseObject.saveInBackground()
            votesLabel.text = "+\(votes)"
        }
    }
}

No ! anymore!

StackExchange Code Review Q#112353, answer score: 2