Cannot subscript a value of [AnyObject]? with an index of type Int
Solution 1
The problem isn't the cast, but the fact that self.objects
seems to be an optional array: [AnyObject]?
.
Therefore, if you want to access one of its values via a subscript, you have to unwrap the array first:
var user2: PFUser
if let userObject = self.objects?[indexPath.row] {
user2 = userObject as! PFUser
} else {
// Handle the case of `self.objects` being `nil`.
}
The expression self.objects?[indexPath.row]
uses optional chaining to first unwrap self.objects
, and then call its subscript.
As of Swift 2, you could also use the guard statement:
var user2: PFUser
guard let userObject = self.objects?[indexPath.row] else {
// Handle the case of `self.objects` being `nil` and exit the current scope.
}
user2 = userObject as! PFUser
Solution 2
I ran into the same issue and resolved it like this:
let scope : String = searchBar.scopeButtonTitles![searchBar.selectedScopeButtonIndex] as! String
For your case, you might do:
var user2 : PFUser = self.objects![indexPath.row] as! PFUser
Solution 3
My workaround would be..
- If you are certain that the tableview will contain only users try to typecast the objects Array of AnyObject to Array of PFUser. then use it.
Solution 4
Just add an ! (exclamation mark) after objects, like so:
var user2 = self.objects![indexPath.row] as! PFUser
That fixed it for me :)
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user1406716
Updated on May 07, 2020Comments
-
user1406716 about 4 years
This is in a class extending PFQueryTableViewController and I am getting the following error. The rows will be
PFUser
only.
Why am I not able to cast it? Is there a way around this?The error is:
Cannot subscript a value of [AnyObject]? with an index of type Int
...for this line:
var user2 = self.objects[indexPath.row] as! PFUser
-
user1406716 about 9 yearsthat still gives error, but this works, not sure why:
var user2 = self.objects![indexPath.row] as! PFUser
-
Amit89 about 9 yearsBecause objects Array is optional [AnyObject]?