How to retrieve a value from dictionary in Swift 3

Question

I have this function that fetch users from FireBase and convert them in Dictionary:

 let leaderBoardDB = FIRDatabase.database().reference().child("scores1").queryOrderedByValue().queryLimited(toLast: 5)
        leaderBoardDB.observe( .value, with: { (snapshot) in
            print("scores scores", snapshot)

            if let dictionary = snapshot.value as? [String: Any] {
                for playa in dictionary {
                    let player = Player()

                    print("plaaaaayyyyyaaaaa", playa)
                    print("plaaaaayyyyyaaaaa key", playa.key)
                    print("plaaaaayyyyyaaaaa.value", playa.value)
                        player.id = playa.key
                    print(playa.key["name"])

                }
            }   
          }, withCancel: nil)
    }

and I get this result:

plaaaaayyyyyaaaaa ("inovoID", { name = Tatiana; points = 6; }) plaaaaayyyyyaaaaa key inovoID plaaaaayyyyyaaaaa.value { name = Tatiana; points = 6; } aaaa i id Optional("inovoID")

the problem is that i can't obtain the name and the points of the user. when i try it with:

print(playa.key["name"])

it gaves me this error:

Cannot subscript a value of type 'String' with an index of type 'String'

can anyone help me with this, please?

Answer 1

Since your JSON is

"inovoID" : { "name" : "Tatiana", "points" : 6 }

• playa.key is "inovoID"
• playa.value is { "name" : "Tatiana", "points" : 6 }

The key is String and cannot be subscripted. That's what the error says.

You need to subscribe the value and safely cast the type to help the compiler.

if let person = playa.value as? [String:Any] {
   print(person["name"] as! String)
}

Answer 2

I think you're looking for:

player.name = dictionary["name"] as? String

You don't need to iterate through the dictionary to access it's values. If you're looking for the value of a key, just get it.