Firebase Real Database数据获取

Question

I am trying the get the following values as variables

But my code gives me nil

ref.child("users").child(userID!).observeSingleEvent(of: .value, with: { (snapshot) in
    // Get user value
    let value = snapshot.value as? NSDictionary
    let userInfo = value?["UserInfo"] as? NSDictionary
    let data = userInfo?["lat"] as? String ?? ""
    print(data)


    // ...
}) { (error) in
    print(error.localizedDescription)
}

ًWhat am I missing ?

Answer 1

You have just to do a small change here:

let data = userInfo?["lat"] as? String ?? ""

Latitude is not a String, but an Int, so cast as Int:

let data = userInfo?["lat"] as? Int ?? 0