FIrebaseのdisplayNameとpictureURLの取得・更新

fbdisplayName.swift

import UIKit
import Firebase
import SDWebImage

class accountViewController: UIViewController, UIImagePickerControllerDelegate,UINavigationControllerDelegate {
    
    let firebaseAuth = Auth.auth()
    let imagePick = UIImagePickerController()
    
    @IBOutlet weak var profImage: UIImageView!

    @IBOutlet weak var profName: UIButton!
    
    
        override func viewDidLoad() {
        super.viewDidLoad()
        imagePick.delegate = self
          
  
            // プロフィール画像読み込み
            SDWebImageManager.shared.loadImage(with: firebaseAuth.currentUser!.photoURL, options: .highPriority, progress: nil) { (image, data, error, cacheType, isFinished, imageUrl) in
                self.profImage.image = image
            }
    
          // プロフィール名前読み込み
            profName.setTitle(firebaseAuth.currentUser!.displayName, for: .normal)
    }
    
  
    
    
    
    @IBAction func changeProfImage(_ sender: Any) {
        imagePick.sourceType = .photoLibrary
        imagePick.modalPresentationStyle = .fullScreen
        present(imagePick, animated: true, completion: nil)
    }
    
    // カメラロールから写真を選ぶ
    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
    
        dismiss(animated: true, completion: nil)
        //保存のアラートを出す
        let alert: UIAlertController = UIAlertController(title: "保存しますか？", message: "Want to save?", preferredStyle:  UIAlertController.Style.alert)

        // OKの場合
        let defaultAction: UIAlertAction = UIAlertAction(title: "OK", style: UIAlertAction.Style.default, handler:{
            
            (action: UIAlertAction!) -> Void in
            print("OK")
            
            if let pickedImage = info[.originalImage] as? UIImage {
                self.profImage.contentMode = .scaleAspectFit
                self.profImage.image = pickedImage
            }
            
            self.upload()
        })
        
        //キャンセルの場合
        let cancelAction: UIAlertAction = UIAlertAction(title: "キャンセル", style: UIAlertAction.Style.cancel, handler:{
          
            (action: UIAlertAction!) -> Void in
            print("選択をキャンセルしました")
        })


        alert.addAction(defaultAction)
        alert.addAction(cancelAction)


        self.present(alert, animated: true, completion: nil)
    }
    
    // Firebaseにアップロード
    fileprivate func upload() {
     
        let storageRef = Storage.storage().reference(forURL: "gs://XXX.com").child("users").child("profile").child("profImage.jpg")
        let metaData = StorageMetadata()
        metaData.contentType = "image/jpg"
        if let uploadData = self.profImage.image?.jpegData(compressionQuality: 0.3) {
            storageRef.putData(uploadData, metadata: metaData) { (metadata , error) in
                if error != nil {
                    print("error: \(error!.localizedDescription)")
                 return
                }
                storageRef.downloadURL(completion: { (url, error) in
                    if error != nil {
                        print("error: \(error!.localizedDescription)")
                    }
                    print("url: \(url!.absoluteString)")
                    let changeRequest = self.firebaseAuth.currentUser?.createProfileChangeRequest()
                    if let photoURL = URL(string: url!.absoluteString){
                    changeRequest?.photoURL = photoURL
                               }
                    changeRequest?.commitChanges { (error) in
                      // ...
                    }

                })
            }
        }
    }
    
    // 写真を選ぶのをキャンセル
       func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
           dismiss(animated: true, completion: nil)
           print("キャンセルされました")
       }
  
  
  @IBAction func changeProfName(_ sender: Any) {
        let alert: UIAlertController = UIAlertController(title: "名前を変更します", message: "", preferredStyle:  UIAlertController.Style.alert)
            
            // OKの場合
                let defaultAction: UIAlertAction = UIAlertAction(title: "変更", style: UIAlertAction.Style.default, handler:{
                    (action: UIAlertAction!) -> Void in
                    
                    self.profName.setTitle(alert.textFields?.first?.text, for: .normal)
                     let changeRequest = self.firebaseAuth.currentUser?.createProfileChangeRequest()
                           changeRequest?.displayName = alert.textFields?.first?.text
                           changeRequest?.commitChanges { (error) in
                             // ...
                           }
                })
            
                //キャンセルの場合
                let cancelAction: UIAlertAction = UIAlertAction(title: "キャンセル", style: UIAlertAction.Style.cancel, handler:{
              
                    (action: UIAlertAction!) -> Void in
                    print("変更をキャンセルしました")
                })
                alert.addAction(defaultAction)
                alert.addAction(cancelAction)
            
            //textfiledの追加
            alert.addTextField(configurationHandler: {(text:UITextField!) -> Void in
                text.placeholder = "新しい名前"
            })
                self.present(alert, animated: true, completion: nil)

    }
   }