Swift 3.0のFirebaseからのデータ取得

Question

私はFirebaseでアプリを使用しています。

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) 
      } 
     }) 

しかし、2行目に、それは私にエラーを与える：このコードに

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) 
      } 
     }) 

：

3.0今日迅速に移動した後、Xcodeは、このコードを変更するために私に尋ねた

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

これはFireBaseのjsonデータです：

{ 
    “user1” : { 
    "Dogs" : { 
     "User" : [ "siACmQZ7MDclDSO3hrCOp953kfl2" ], 
     "latitude" : [ "32.172344" ], 
     "longitude" : [ "34.858068" ] 
    } 
    “user2” : { 
    "Dogs" : { 
     "User" : [ "siACmQZ7MDclDSO3hrCOp953kfl2" ], 
     "latitude" : [ "32.172344" ], 
     "longitude" : [ "34.858068" ] 
    } 
    “user3” : { 
    "Dogs" : { 
     "User" : [ "siACmQZ7MDclDSO3hrCOp953kfl2" ], 
     "latitude" : [ "32.172344" ], 
     "longitude" : [ "34.858068" ] 
    } 
} 

Answer 1

これは私のコードを固定した後、適切なソリューションです：

を

ref.observe(.childAdded, with: { snapshot in 
      if let snapshotValue = snapshot.value as? [String:Any], 
       let currentData = snapshotValue["Dogs"] as? [String:Any] { 
       let userid = (currentData["User"])! as! [String] 
       let userid2 = userid[0] 
       let mylat = currentData["latitude"] as! [String] 
       let mylat2 = Double((mylat[0])) 
       let mylon = (currentData["longitude"])! as! [String] 
       let mylon2 = Double((mylon[0])) 
       let otherloc = CLLocation(latitude: mylat2!, longitude: mylon2!) 
       self.distanceBetweenTwoLocations(self.currentLocation, destination: otherloc, userid: userid2) 
      } 

Answer 2

私はちょうどsnapshot.value as! [String:AnyObject]

---

EDITキャストそれを修正：（SwiftyJSONを使用して）

よりよい解決策：

func parseFirebaseResponse(snapshot: FIRDataSnapshot) -> [JSON] { 
    var returnJSON: [JSON] = [] 
    let snapDict = snapshot.value as? [String:AnyObject] 
    for snap in snapshot.children.allObjects as! [FIRDataSnapshot] { 
     let json = snapDict?[snap.key] 
     returnJSON.append(JSON(json as Any)) 
    } 
    return returnJSON 
} 

Answer 3

それ取得NSDictionaryの内のすべての既存firebaseのユーザーデータを格納：

let ref = FIRDatabase.database().reference(fromURL: "DATABASE URL") 
let usersRef = ref.child("users").observeSingleEvent(of: .value, with: {(snapshot) in 
print(snapshot) 
let Dict = snapshot.value as! NSDictionary //stores users data in dictionary(key/value pairs) 
print(Dict)