Question

我试图从firebase加载数据。我成功加载了诸如usename和email之类的数据，但不知怎的，它无法加载图像。我附加了我用来从firebase加载数据的代码。请帮忙。谢谢。

代码：

import UIKit
import FirebaseDatabase
import  Firebase

class ProfileVC: UIViewController {


@IBOutlet weak var currentphoto: UIImageView!

@IBOutlet weak var usernameLabel: UILabel!

@IBOutlet weak var BioOrEmailLabel: UILabel!

var databasereff : DatabaseReference!


override func viewDidLoad() {
    super.viewDidLoad()

    databasereff = Database.database().reference()
    if let userid = Auth.auth().currentUser?.uid
    {
        databasereff.child("users").child(userid).observeSingleEvent(of: .value, with: { (snapshot) in
            let dict = snapshot.value as? [String:Any]
            let username = dict?["username"] as? String
            let email = dict?["email"] as? String
            if let photourl = dict?["profileimageUrl"] as? String
            {
                let url = URL(string: photourl)
                URLSession.shared.dataTask(with: url!, completionHandler: { (data, response, error) in
                    if error != nil{
                            print(error?.localizedDescription)
                        return
                    }
                    OperationQueue.main.addOperation  {
                        self.currentphoto.image = UIImage(data: data!)
                    }
                }).resume()
            }
            self.usernameLabel.text = username
            self.BioOrEmailLabel.text = email
        })
        {
            (error) in
            print(error.localizedDescription)
        }
    }

    // Do any additional setup after loading the view.
}

 }

Answer 1

您需要创建FIRStorage引用以从 Firebase数据库中检索文件。

首先：

import FirebaseStorage

第二个采用存储参考：

var storage: FIRStorage!

然后初始化

storage = FIRStorage.storage()

现在：

let dbRef = database.reference().child("myFiles")
dbRef.observeEventType(.ChildAdded, withBlock: { (snapshot) in
  // Get download URL from snapshot
  let downloadURL = snapshot.value() as! String
  // Create a storage reference from the URL
  let storageRef = storage.referenceFromURL(downloadURL)
  // Download the data, assuming a max size of 1MB (you can change this as necessary)
  storageRef.dataWithMaxSize(1 * 1024 * 1024) { (data, error) -> Void in
    // Create a UIImage, add it to the array
    let pic = UIImage(data: data)
    picArray.append(pic)
  })
})

在你的情况下，路径是不同的，所以只需改变路径和干杯！

参考：from here

无法从Firebase数据库加载图片swift3

1 个答案: