I have been making an app in Swift but I keep getting an error in my TableViewController class. I could not find any way to fix this and kept getting this error :
override func tableView(tableView: UITableView?, cellForRowAtIndexPath indexPath: NSIndexPath!) -> UITableViewCell! {
let cell : TextTableViewCell = tableView!.dequeueReusableCellWithIdentifier("Cell", forIndexPath : indexPath!) as TextTableViewCell
let madan : PFObject = self.timeLineData.objectAtIndex(indexPath!.row) as PFObject
cell.timestampLabel.alpha = 0
cell.usernameLabel.alpha = 0
cell.madanTextView.alpha = 0
cell.madanTextView.text = madan.objectForKey("content") as String
var dateFormatter : NSDateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "MM-dd-yyyy HH:mm"
cell.timestampLabel.text = dateFormatter.stringFromDate(madan.createdAt)
var findSender : PFQuery = PFUser.query()
findSender.whereKey("objectId", equalTo: madan.objectForKey("sender").objectId)
var i = 1
findSender.findObjectsInBackgroundWithBlock {
(objects: [AnyObject]!, error: NSError!) -> Void in
if !error {
let user : PFUser = (objects as NSArray).lastObject as PFUser // Error here
cell.usernameLabel.text = user.username
UIView.animateWithDuration(0.5, animations: {
cell.timestampLabel.alpha = 1
cell.usernameLabel.alpha = 1
cell.madanTextView.alpha = 1
})
}
}
return cell
}
I cannot find any way to fix this.
It looks as if objects
is coming back as nil
. First check for nil:
if !error {
if let actualObjects = objects {
let possibleUser = (actualObjects as NSArray).lastObject as? PFUser
if let user = possibleUser {
cell.usernameLabel.text = user.username
// ...
}
}
}
Note: I changed your as
to as?
. lastObject
is already returning an Optional and so you might as well let the execution continue if the last object cannot be converted to PFUser. Also, because lastObject
might return nil, you also need to check that for nil
.