swift - 存储中的 Firebase 图像被重写，仅保留最后两个

Question

在我的 Firebase 项目中，用户可以上传图像，并将其存储在 Firebase 存储上名为 images 的文件夹中。

但是，每当我通过上传图像来测试它时，该文件夹仅显示我最近上传的 2 张图像。我希望它保留所有上传的图像。

有其他人遇到过类似的问题吗？我不知道问题出在我的代码中还是 Firebase 中，但这是我的代码:

import UIKit
import FirebaseStorage

class PostViewController: UIViewController,UINavigationControllerDelegate, UIImagePickerControllerDelegate {

    @IBOutlet weak var imageView: UIImageView!
    @IBOutlet weak var noteTextField: UITextField!
    var imagePicker = UIImagePickerController()
    var imageName = "\(NSUUID().uuidString).jpeg"
    var imageURL = ""


    override func viewDidLoad() {
        super.viewDidLoad()
        let tapGesture = UITapGestureRecognizer(target: view, action: #selector(UIView.endEditing))
        view.addGestureRecognizer(tapGesture)
        imagePicker.delegate = self

    }

    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
        if let selectedImage = info[UIImagePickerController.InfoKey.originalImage] as? UIImage {
            imageView.image = selectedImage

        }
        dismiss(animated:true, completion: nil)
    }




    @IBAction func cameraTapped(_ sender: Any) {
        imagePicker.sourceType = .camera
        present(imagePicker,animated: true, completion: nil)
    }

    @IBAction func choosePhotoTapped(_ sender: Any) {
        imagePicker.sourceType = .photoLibrary
        present(imagePicker,animated: true, completion: nil)
    }
    @IBAction func postTapped(_ sender: Any) {

        let imagesFolder = Storage.storage().reference().child("images")
        if let image = imageView.image{
            if let imageData : Data = image.jpegData(compressionQuality: 1){
                imagesFolder.child(imageName).putData(imageData, metadata: nil) { (metaData, error) in
                    if let error = error{
                        print(error)

                    }else{
                        imagesFolder.child(self.imageName).downloadURL { (url, error) in
                            if let imageURL = url?.absoluteString{
                                self.imageURL = imageURL
                                self.performSegue(withIdentifier: "successSegue", sender: nil)
                            }
                        }
                    }
                }
            }
        }
    }

}

Firebase 设置中可能存在此问题吗？

Answer 1

一个问题是，当实例化 PostViewController 时，会填充 imageName var，并且每次点击保存图像时，都会以相同的名称保存。例如，如果应用程序重新启动，因为将实例化新的 PostViewController，这将创建新的 imageName 属性，则名称将会更改

修复方法是移动 imageName 属性，以便每次用户点击时都会创建它

    class PostViewController: UIViewController,UINavigationControllerDelegate, UIImagePickerControllerDelegate {

        @IBOutlet weak var imageView: UIImageView!
        @IBOutlet weak var noteTextField: UITextField!
        var imagePicker = UIImagePickerController()
  |---      //var imageName = "\(NSUUID().uuidString).jpeg"  //move this
  |      var imageURL = ""
  |      .
  |      .
  |       @IBAction func postTapped(_ sender: Any) {
  |   
  |           let imagesFolder = Storage.storage().reference().child("images")
  |           if let image = imageView.image {
  |              if let imageData : Data = image.jpegData(compressionQuality: 1) {  
  |---->            let imageName = "\(NSUUID().uuidString).jpeg"  //to here  
                    imagesFolder.child(imageName).putData(imageData, metadata: nil) { (metaData, error) in
                        if let error = error{