Swift Optional Type not Unwrapped

debugcn Published at Dev

Kareem Arab

I've been having a problem probably due to the new updated version of Swift. The problem is that this line of code keeps producing an error saying that:

"value of optional type '()?' not unwrapped; did you mean to use '!' or '?'?

cell?.hypeImageView?.image = UIImage(data: imageData)

This is the entire function:

    override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath, object: PFObject?) -> PFTableViewCell? {

    var cell:HypeTableViewCell? = tableView.dequeueReusableCellWithIdentifier(cellIdentifier) as? HypeTableViewCell
    if(cell == nil) {
        cell = NSBundle.mainBundle().loadNibNamed("HypeTableViewCell", owner: self, options: nil)[0] as? HypeTableViewCell
    }

    if let pfObject = object {
        cell?.hypeNameLabel?.text = pfObject["name"] as? String

        var votes:Int? = pfObject["votes"] as? Int
        if votes == nil {
            votes = 0
        }
        cell?.hypeVotesLabel?.text = "\(votes!) votes"

        let credit:String? = pfObject["cc_by"] as? String //if prob change to var
        if credit != nil {
            cell?.hypeCreditLabel?.text = "\(credit!) / CC 2.0"
        }

        cell?.hypeImageView?.image = nil
        if var urlString:String? = pfObject["url"] as? String {
            var url:NSURL? = NSURL(string: urlString!)
            if var url:NSURL? = NSURL(string: urlString!) {
                var error:NSError?
                var request:NSURLRequest = NSURLRequest(URL: url!, cachePolicy: NSURLRequestCachePolicy.ReturnCacheDataElseLoad, timeoutInterval: 5.0)

                NSOperationQueue.mainQueue().cancelAllOperations()

                NSURLConnection.sendAsynchronousRequest(request, queue: NSOperationQueue.mainQueue(), completionHandler: {
                    (response:NSURLResponse!, imageData:NSData!, error:NSError!) -> Void in

                    cell?.hypeImageView?.image = UIImage(data: imageData)

                })
            }
        }

    }

    return cell

}

How can I fix this issue?

Steve Wilford

Assuming you're using Swift 2.0 change the signature for the completionHandler to expect optionals rather than implicitly unwrapped optionals, then the problem will go away.

NSURLConnection.sendAsynchronousRequest(request, queue: NSOperationQueue.mainQueue()) { (response:NSURLResponse?, data:NSData?, error:NSError?) -> Void in

    guard let imageData = data else {
        assertionFailure("No data found")
        return
    }

    cell?.hypeImageView?.image = UIImage(data: imageData)
}

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