Cannot call value of non-function type 'Any?!' :- Firebase,Swift3

Question

This is my code before moving to Swift 3:

ref.observeEventType(.ChildAdded, withBlock: { snapshot in

            let currentData = snapshot.value!.objectForKey("Dogs")

            if currentData != nil {

            let mylat = (currentData!["latitude"])! as! [String]

            let mylat2 = Double((mylat[0]))

            let mylon = (currentData!["longitude"])! as! [String]

            let mylon2 = Double((mylon[0]))

            let userid = (currentData!["User"])! as! [String]

            let userid2 = userid[0]

            let otherloc = CLLocation(latitude: mylat2!, longitude: mylon2!)

            self.distanceBetweenTwoLocations(self.currentLocation, destination: otherloc, userid: userid2)

            }

        })

This is my code after moving to Swift 3:

ref.observe(.childAdded, with: { snapshot in

            let currentData = (snapshot.value! as AnyObject).object("Dogs")

            if currentData != nil {

                let mylat = (currentData!["latitude"])! as! [String]

                let mylat2 = Double((mylat[0]))

                let mylon = (currentData!["longitude"])! as! [String]

                let mylon2 = Double((mylon[0]))

                let userid = (currentData!["User"])! as! [String]

                let userid2 = userid[0]

                let otherloc = CLLocation(latitude: mylat2!, longitude: mylon2!)

                self.distanceBetweenTwoLocations(self.currentLocation, destination: otherloc, userid: userid2)

            }

        })

And then I get an error in the 2nd line:

Cannot call value of non-function type 'Any?!'

The only thing I tried is changing the 2nd line to this code:

snapshot.value as! [String:AnyObject]

But it's not right, there is no "Dogs" included and it's giving me a warning that the

distanceBetweenTwoLocations

code never used.

Answer 1

See the issue is that when you are instancing and initialising your variable you are telling it that the value its gonna receive will be a value for the object named Dogs present in this snapshot whose type is AnyObject.

But snapshot.value is of type Dictionary i.e [String:AnyObject],NSDictionary..

And the Dogs node that you retrieve is of type, either Dictionary or an Array.

Basically you should avoid to store a value in a variable, of type AnyObject

Try this:-

      FIRDatabase.database().reference().child("Posts").child("post1").observe(.childAdded, with: { snapshot in
        if let currentData = (snapshot.value! as! NSDictionary).object(forKey: "Dogs") as? [String:AnyObject]{

            let mylat = (currentData["latitude"])! as! [String]
            let mylat2 = Double((mylat[0]))
            let mylon = (currentData["longitude"])! as! [String]
            let mylon2 = Double((mylon[0]))
            let userid = (currentData["User"])! as! [String]
            let userid2 = userid[0]
            let otherloc = CLLocation(latitude: mylat2!, longitude: mylon2!)
            self.distanceBetweenTwoLocations(self.currentLocation, destination: otherloc, userid: userid2)
        }
    })

PS:- Seeing your JSON structure you might wanna convert it into a Dictionary not a Array

Cannot call value of non-function type 'Any?!' :- Firebase,Swift3

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