Facebook iOS SDK and swift: how get user's profile picture

Question

i have integrated Facebook sdk in Xcode 6 (with swift). During the login i request the public_profile permission:

FBSession.openActiveSessionWithReadPermissions(         


        

Answer 1

For Swift 5

First add the fields that you need

let params = ["fields": "first_name, last_name, email, picture"]

Create the graph request

let graphRequest = GraphRequest(graphPath: "me", parameters: params, tokenString: token.tokenString, version: nil, httpMethod: .get)
graphRequest.start { (connection, result, error) in }

You will get the result in json

{
  "first_name": "",
  "last_name": "",
  "picture": {
    "data": {
      "height": 50,
      "is_silhouette": false,
      "url": "",
      "width": 50
    }
  },
  "id": ""
}

According to the json response, catch the result

if let error = error {
            print("Facebook graph request error: \(error)")
        } else {
            print("Facebook graph request successful!")
            guard let json = result as? NSDictionary else { return }
            if let id = json["id"] as? String {
                print("\(id)")
            }
            if let email = json["email"] as? String {
                print("\(email)")
            }
            if let firstName = json["first_name"] as? String {
                print("\(firstName)")
            }
            if let lastName = json["last_name"] as? String {
                print("\(lastName)")
            }
            if let profilePicObj = json["picture"] as? [String:Any] {
                if let profilePicData = profilePicObj["data"] as? [String:Any] {
                    print("\(profilePicData)")
                    if let profilePic = profilePicData["url"] as? String {
                        print("\(profilePic)")
                    }
                }
            }
        }
    }

You can also get custom width profile image by sending the required width in the params

let params = ["fields": "first_name, last_name, email, picture.width(480)"]

This is how the whole code would like

if let token = AccessToken.current {
            let params = ["fields": "first_name, last_name, email, picture.width(480)"]
            let graphRequest = GraphRequest(graphPath: "me", parameters: params,
                                            tokenString: token.tokenString, version: nil, httpMethod: .get)
            graphRequest.start { (connection, result, error) in
                if let error = error {
                    print("Facebook graph request error: \(error)")
                } else {
                    print("Facebook graph request successful!")
                    guard let json = result as? NSDictionary else { return }
                    if let id = json["id"] as? String {
                        print("\(id)")
                    }
                    if let email = json["email"] as? String {
                        print("\(email)")
                    }
                    if let firstName = json["first_name"] as? String {
                        print("\(firstName)")
                    }
                    if let lastName = json["last_name"] as? String {
                        print("\(lastName)")
                    }
                    if let profilePicObj = json["picture"] as? [String:Any] {
                        if let profilePicData = profilePicObj["data"] as? [String:Any] {
                            print("\(profilePicData)")
                            if let profilePic = profilePicData["url"] as? String {
                                print("\(profilePic)")
                            }
                        }
                    }
                }
            }
        }

Check out Graph API Explorer for more fields.