如何创建用户个人资料图像
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【中文标题】如何创建用户个人资料图像【英文标题】：How to create a user profile image 【发布时间】：2019-12-06 16:49:42 【问题描述】：当我的用户注册时，他的所有用户信息都会直接进入 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，但没有出现个人资料图片如何修复此代码以更改它？ 我需要我的用户注册时使用的个人资料图片才能在他的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
【问题讨论】：
【参考方案1】：您必须使用从 firebase 检索到的 url 并使用他们的 Storage API 下载它
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()
【讨论】：
【参考方案2】：您需要将指向存储桶中引用的 url 存储在数据库中的用户对象中。这是我使用的函数，它采用 UIImage 和 String 表示 Firebase 路径并返回上传图片的 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)
)
要上传图片并更新数据库中的用户对象，您可以这样做：
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抓取图像：
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()
【讨论】：
Database.database().reference().child("Users/(Auth.auth().currentUser.uid)/photoUrls/0").observeSingleEvent(of: .value) (快照）在让 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 / /更新图像 self.ProfileImage.image = image task.resume() ERROR 调用中的额外参数 我不在家，但这是用于已部署应用程序的代码，我们对此没有任何问题。它可能没有正确应用。有时间我看看能不能给你修改一下 我真的很感激 这是一个链接，解释了您如何错误地实施它。这是一个简单的 Swift 格式化的东西。 pastebin.com/zj2ugaLy以上是关于如何创建用户个人资料图像的主要内容，如果未能解决你的问题，请参考以下文章
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