Question

当我的用户注册后，他所有的用户信息都直接进入Firebase存储和数据库（例如：用户名和个人资料图片）。当我的用户注册时，用户名出现在他的个人资料上，但没有个人资料图像出现，如何解决此代码以更改此代码？ 我需要用户注册时使用的个人资料图像在其个人资料屏幕上弹出

 import Firebase

class InteractivViewController: UIViewController {
    @IBOutlet weak var UsernameText: UILabel!

    @IBOutlet weak var ProfileImage: UIImageView!

    @IBOutlet weak var DisplayText: UILabel!

    var DatabaseRef: DatabaseReference!
    override func viewDidLoad() {
        super.viewDidLoad()

       DatabaseRef = Database.database().reference()

  if let userID = Auth.auth().currentUser?.uid {
        DatabaseRef.child("users").child(userID).observeSingleEvent(of: .value, with: { (snapshot) in
          // Get user value
          let dictionary = snapshot.value as? NSDictionary
         let username = dictionary?["username"] as? String ?? "username"
          if let profileImageUrl = dictionary?["photo"] as? String {

              func getProfileImage(uid: String, success: @escaping (UIImage?)->Void)
          {

              let storageRef = Storage.storage().reference().child("usersImages")
              storageRef.child("\(uid).jpg").getData(maxSize: 1024*1024) { (data, error) in
                  guard let data = data else {return}
                  DispatchQueue.main.async {
                      success(UIImage(data: data))

                  getProfileImage(uid: userID) { image in
                      self.ProfileImage.image = image
                   }
              }
          }
              }
            func upload(image: UIImage, to firebasePath: String, completion: @escaping (String?, Error?) -> Void) {
                //... creates data from the image...
                var data = NSData()
                //Compress the image by any percent
                data = image.jpegData(compressionQuality: 0.8)! as NSData
                //...sets the upload path
                let filePath = "\(Auth.auth().currentUser!.uid)0)" // path where you wanted to store img in storage
                print(filePath)
                let metaData = StorageMetadata()
                metaData.contentType = "image/jpg"

                let storageRef = Storage.storage().reference().child(filePath)
                storageRef.putData(data as Data, metadata: metaData){(metaData,error) in
                    if let error = error {
                        print(error.localizedDescription)
                        completion(nil, error)
                        return
                    } else {
                        storageRef.downloadURL(completion: { (url, error) in
                            //Returns the url string to the newly uploaded image so that we can set the user's photoURL database property to this string
                            Database.database().reference().child(firebasePath).setValue(url!.absoluteString)
                            completion(url!.absoluteString, nil)
                        })
                    }
                }

            let image = UIImage(named: "someImage")
            upload(image: image!, to: "Users/\(Auth.auth().currentUser!.uid)/photoUrls/0", completion: { urlString, error in
                Database.database().reference().child("Users/\(Auth.auth().currentUser!.uid)/photoUrls/0").setValue(urlString)
            },
                Database.database().reference().child("Users/\(Auth.auth().currentUser!.uid)/photoUrls/0").observeSingleEvent(of: .value) { (snapshot) in
                    let urlString = snapshot.value as! String
                    let task = URLSession.shared.dataTask(with: URL(string: urlString)!) {(data, response, error) in

                        if let image: UIImage = UIImage(data: data!) {
                            DispatchQueue.main.async {
                                //update the image
                                self.ProfileImage.image = image
                            }
                        }
                    }
                    task.resume()
                }
                   )}

            }


                                   self.UsernameText.text = username
                                       self.DisplayText.text = username


                                       return

                     }

Answer 1

您必须使用从firebase检索到的网址，并使用其存储API下载

let storage = Storage.storage()
let storageRef = storage.reference()
let ref = storage.reference(forURL: profileImageUrl)
ref.getData(maxSize: 1 * 1024 * 1024) { data, error in
   if let error = error {
     // Uh-oh, an error occurred!
  } else {

     self.ProfileImage = UIImage(data: data!)
    self.view.addSubview(self.ProfileImage)
    self.reloadInputViews()
  }
 }

Answer 2

您需要将指向引用的URL存储在数据库中用户对象内的存储桶中。我使用的功能是使用UIImage和String表示Firebase路径并返回上传图像的URL：

func upload(image: UIImage, to firebasePath: String, completion: @escaping (String?, Error?) -> Void) {
    //... creates data from the image...
    var data = NSData()
    //Compress the image by any percent
    data = UIImageJPEGRepresentation(image, 0.8)! as NSData
    //...sets the upload path
    let filePath = "\(Auth.auth().currentUser!.uid)0)" // path where you wanted to store img in storage
    print(filePath)
    let metaData = StorageMetadata()
    metaData.contentType = "image/jpg"

    let storageRef = Storage.storage().reference().child(filePath)
    storageRef.putData(data as Data, metadata: metaData){(metaData,error) in
        if let error = error {
            print(error.localizedDescription)
            completion(nil, error)
            return
        } else {
            storageRef.downloadURL(completion: { (url, error) in
                //Returns the url string to the newly uploaded image so that we can set the user's photoURL database property to this string
                Database.database().reference().child(firebasePath).setValue(url!.absoluteString)
                completion(url!.absoluteString, nil)
            })
        }
    }
}

要上传图像并更新数据库中的用户对象，可以执行以下操作：

let image = UIImage(named: "someImage")
upload(image: image, to: "Users/\(Auth.auth().currentUser!.uid)/photoUrls/0", completion: { urlString, error in
    Database.database().reference().child("Users/\(Auth.auth().currentUser!.uid)/photoUrls/0").setValue(urlString)
}

然后，您可以通过以下方式获取图像：

Database.database().reference().child("Users/\(Auth.auth().currentUser!.uid)/photoUrls/0").observeSingleEvent(of: .value) { (snapshot) in
    let urlString = snapshot.value as! String
    let task = URLSession.shared.dataTask(with: URL(string: urlString)!) {(data, response, error) in

        if let image: UIImage = UIImage(data: data!) {
            DispatchQueue.main.async {
                //update the image
                self.ProfileImage.image = image
            }
        }
    }
    task.resume()
}

如何创建用户个人资料图像

2 个答案: