Two prototype cells in one section - ios

Question

I have two prototype cells. One appears if messagesArray[indexPath.row] value is "", the other if that value contains characters. One of the cells' row height is greater than the second and contains additional variables. They're both hooked up to their own cell classes and have their own cell identifiers. I want them both to coexist in the same tableview, under one section, but I'm struggling to achieve that. I keep getting fatal error: Array index out of range. The array value is being populated from an async DB request, which could be the explanation.
What am I doing wrong/how can I do this successfully?
var messagesArray = [String]()
override func viewDidLoad() {
super.viewDidLoad()
var query = PFQuery(className: "Class")
query.findObjectsInBackgroundWithBlock { (objects, error) -> Void in
if error == nil {
if let objects = objects {
for object in objects {
if let message = object["message"] as? String {
self.messagesArray.append(message)
}
}
}
} else {
println(error)
}
}
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
if self.messagesArray[indexPath.row] == "" {
var cell = tableView.dequeueReusableCellWithIdentifier("cellOne", forIndexPath: indexPath) as! CellOne
return cell
} else {
var cell = tableView.dequeueReusableCellWithIdentifier("cellTwo", forIndexPath: indexPath) as! CellTwo
return cell
}
}
EDIT: If messagesArray[indexPath.row] == some value other than "" (there's actually a message), then that first cell in which the message is displayed in will be larger than the second cell and be displayed by a UILabel that doesn't exist in second cell.

Answer 1

if you are using dynamic cells you must not have two prototype cells on your tableView, only one is needed to get the job done.
var messagesArray = [String]()
override func viewDidLoad() {
super.viewDidLoad()
var query = PFQuery(className: "Class")
query.findObjectsInBackgroundWithBlock { (objects:[AnyObject]?, error:NSError) -> Void in
if error == nil
{
if let objects = objects as? [PFObject]
{
for object in objects
{
var message = object["message"]
self.messagesArray.append(message)
self.tableView.reloadData()
}
}
}
else
{
println(error)
}
}
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
var cell = tableView.dequeueReusableCellWithIdentifier("cellOne", forIndexPath: indexPath) as! CellOne
var data = self.messagesArray[indexPath.row]
cell.textlabel.text = data
}