Wie können Sie zwei Bilder gleichzeitig in Firebase Storage hochladen?

Question

warum funktioniert das nicht? Wie bekomme ich alle Funktionen zum Ausführen und Ausführen der Aufgabe? Ich versuche zwei Bilder auf meinen Firebase-Speicher hochzuladen und erhalte zwei Download-URLs für die Bilder in meiner Firebase-Datenbank (innerhalb des Posts). Und wie bekomme ich es, das zweite Bild zu ignorieren, wenn es nicht da ist?

@IBAction func pickImage1(_ sender: Any) { 


    let image = UIImagePickerController() 
    image.delegate = self 
    image.sourceType = UIImagePickerControllerSourceType.photoLibrary 
    image.allowsEditing = false 
    selected = 1 

    self.present(image, animated: true) 
} 

//Add didFinishPickingMediaWithInfo here 
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) { 
    if let image = info[UIImagePickerControllerOriginalImage] as? UIImage { 
     if selected == 1 { 
      myImageView1.image = image 
     } else { 
      myImageView2.image = image 
     } 
    } 
    else { 
     //error 
    } 
    self.dismiss(animated: true, completion: nil) 
} 


@IBAction func pickImage2(_ sender: Any) { 

     let image2 = UIImagePickerController() 
    image2.delegate = self 
    image2.sourceType = UIImagePickerControllerSourceType.photoLibrary 
    image2.allowsEditing = false 
    selected = 2 

    self.present(image2, animated: true) 
} 




@IBAction func upload(_ sender: Any) { 


    if let image1 = myImageView1.image { 
     guard let data = UIImagePNGRepresentation(image1) else { return } 

     let storageRef = Storage.storage().reference().child("images/\(NSUUID().uuidString)/image.png") 
     storageRef.putData(data, metadata: nil, completion: { (metadata, error) in 

      if error != nil { 
       print("error") 
       return 

      } 


      else { 
       let downloadURL = metadata?.downloadURL()?.absoluteString 


       self.ref?.child("Posts").childByAutoId().setValue(["Title": self.titleText.text, "Subtitle": self.subtitleText.text, "Article": self.articleText.text, "Author": self.authorText.text, "Date": self.dateText.text, "Tags": self.tagsText.text, "PostType": self.postType.text, "PostStyle": self.postStyle.text, "PostSize": self.postSize.text, "Download URL": (downloadURL)]) 

      return 
      } 



     }) 
    } 

    if let image2 = myImageView2.image { 
     guard let data = UIImagePNGRepresentation(image2) else { return } 

     let storageRef = Storage.storage().reference().child("images/\(NSUUID().uuidString)/image1.png") 
     storageRef.putData(data, metadata: nil, completion: { (metadata, error) in 
      if error != nil { 
       print("error") 
       return 

      } 


      else { 
       let downloadURL = metadata?.downloadURL()?.absoluteString 
       let downloadURL2 = metadata?.downloadURL()?.absoluteString 

       self.ref?.child("Posts").childByAutoId().setValue(["Title": self.titleText.text, "Subtitle": self.subtitleText.text, "Article": self.articleText.text, "Author": self.authorText.text, "Date": self.dateText.text, "Tags": self.tagsText.text, "PostType": self.postType.text, "PostStyle": self.postStyle.text, "PostSize": self.postSize.text, "Download URL": (downloadURL), "Download URL 2": (downloadURL2)]) 


      } 

     }) 
    } 

}

Answer 1

Um zu überprüfen, ob die Datei bereits vorhanden Sie storageRef.metadataWithCompletion anrufen möchten.

Um ein optionales Bild auspacken Sie nur

tun können

if let image = self.myImageView2.image as? UIImage { // upload it }

EDIT

So etwas wie dieses

if let image = imageView.image { 
     guard let data = UIImagePNGRepresentation(image) else { return } 

     let storageRef = Storage.storage().reference().child("images/\(NSUUID().uuidString)/image.png") 
     storageRef.putData(data, metadata: nil, completion: { (metadata, error) in 
      // Handle it 
     } 
    } 

    if let image1 = imageView1.image { 
     guard let data = UIImagePNGRepresentation(image1) else { return } 

     let storageRef = Storage.storage().reference().child("images/\(NSUUID().uuidString)/image1.png") 
     storageRef.putData(data, metadata: nil, completion: { (metadata, error) in 
      // Handle it 
     } 
    } 

auch sicher, sind Sie mit Firebase sonst authticated Uploads wird fehlschlagen. Überprüfen Sie die Konsole, ob die Authentifizierung fehlgeschlagen ist.

EDIT2

Dies sollte den Trick.

func upload(image: UIImage, completion: @escaping (String?) ->()) { 
    guard let data = UIImagePNGRepresentation(image) else { return completion(nil)} 

    let storageRef = databaseStorage.child("images/\(NSUUID().uuidString)/image.png") 
    storageRef.putData(data, metadata: nil) { (metaData, error) in 
     if error != nil { 
      print(error?.localizedDescription ?? "Failed to upload image") 
     } else if metaData != nil && metaData?.downloadURL() != nil { 
      completion(metaData?.downloadURL()!.absoluteString) 
     } else { 
      completion(nil) 
     } 
    } 
} 

func upload() { 
    if imageView.image == nil && imageView1.image == nil { 
     return; 
    } 

    if let image = imageView.image { 
     upload(image: image, completion: { [weak self] (url) in 
      if let image1 = self?.imageView1.image { 
       self?.upload(image: image1, completion: { (url1) in 
        if url == nil && url1 == nil { 
         return 
        } else if url == nil { 
         self.ref?.child("Posts").childByAutoId().setValue(["Title": self.titleText.text, "Subtitle": self.subtitleText.text, "Article": self.articleText.text, "Author": self.authorText.text, "Date": self.dateText.text, "Tags": self.tagsText.text, "PostType": self.postType.text, "PostStyle": self.postStyle.text, "PostSize": self.postSize.text, "Download URL1": (url1)]) 
        } else if url1 == nil { 
         self.ref?.child("Posts").childByAutoId().setValue(["Title": self.titleText.text, "Subtitle": self.subtitleText.text, "Article": self.articleText.text, "Author": self.authorText.text, "Date": self.dateText.text, "Tags": self.tagsText.text, "PostType": self.postType.text, "PostStyle": self.postStyle.text, "PostSize": self.postSize.text, "Download URL": (url)]) 
        } else { 
         self.ref?.child("Posts").childByAutoId().setValue(["Title": self.titleText.text, "Subtitle": self.subtitleText.text, "Article": self.articleText.text, "Author": self.authorText.text, "Date": self.dateText.text, "Tags": self.tagsText.text, "PostType": self.postType.text, "PostStyle": self.postStyle.text, "PostSize": self.postSize.text, "Download URL": (url), "Download URL1" : (url1)]) 
        } 
       }) 
      } 
     }) 
    } else { 
     if let image1 = self.imageView1.image { 
      self.upload(image: image1, completion: { (url1) in 
       if (url1 == nil) { 
        return 
       } 

       self.ref?.child("Posts").childByAutoId().setValue(["Title": self.titleText.text, "Subtitle": self.subtitleText.text, "Article": self.articleText.text, "Author": self.authorText.text, "Date": self.dateText.text, "Tags": self.tagsText.text, "PostType": self.postType.text, "PostStyle": self.postStyle.text, "PostSize": self.postSize.text, "Download URL": (url)]) 

      }) 
     } 
    } 
}