Swift - Core data runtime error - ios

Question

I'm getting this runtime error when trying to create an array of the textLabels in my cells.
My code looks like this:
else {
mySelectedCell.accessoryType = UITableViewCellAccessoryType.Checkmark
mySelectedCell.tintColor = UIColor.blackColor()
if let tx = mySelectedCell.textLabel?.text as Optional?{
var textLabel:String = String()
textLabel = tx!
var tempFriend = Model(entity: en!, insertIntoManagedObjectContext: context)
//Save user to core data
tempFriend.tempUser = textLabel
//Save context
context.save(nil)
//Make list from objects
liste = context.executeFetchRequest(freq, error: nil)!
//Make new list of strings from first list
for var i = 0; i < liste.count; ++i{
var data:NSManagedObject = liste[i] as NSManagedObject
//The next line is where the error appears
showList.append(data.valueForKeyPath("tempUser") as String)
}
//Show list
println(showList)
}
}
}
My error says:
fatal error: unexpectedly found nil while unwrapping an Optional value
(lldb).
I do not understand why something would return "nil" in my code.
Any thoughts would be appreciated.

Answer 1

You're force-unwrapping an optional value that is nil. It's hard to tell which one, since you've omitted the stack trace for the error. Try this:
else {
mySelectedCell.accessoryType = UITableViewCellAccessoryType.Checkmark
mySelectedCell.tintColor = UIColor.blackColor()
if let textLabel = mySelectedCell.textLabel?.text,
let entity = en {
var tempFriend = Model(entity: entity, insertIntoManagedObjectContext: context)
//Save user to core data
tempFriend.tempUser = textLabel
//Save context
context.save(nil)
//Make list from objects
liste = context.executeFetchRequest(freq, error: nil)!
//Make new list of strings from first list
for var i = 0; i < liste.count; ++i{
var data:NSManagedObject = liste[i] as NSManagedObject
//The next line is where the error appears
showList.append(data.valueForKeyPath("tempUser") as String)
}
//Show list
println(showList)
}
}
}