将图像上传到 Firebase 存储只会覆盖 SwiftUI/Swift 5 中的当前照片？

Question

遇到一个问题，当我将应用中的图像上传到 Firebase 存储时，它只会覆盖我存储中的当前图像。就像当我上传一张新照片时，我想在我的存储空间中显示新照片以及已经存在的旧照片。我们可以用下面的代码做点什么吗？感谢您的帮助。

这是我的代码：

    struct UploadPhoto: View {
    @State var showActionSheet = false
    @State var showImagePicker = false
    
    @State var sourceType:UIImagePickerController.SourceType = .camera
    
    @State var upload_image:UIImage?
    @State var download_image:UIImage?
    
    @State private var showsAlert = false
     
    
    var body: some View {
       
        
      
        VStack {
            Text("Please upload your photos here!")
            HStack{
         
                if upload_image != nil {
                Image(uiImage: upload_image!)
                .resizable()
                .scaledToFit()
                    .frame(width:120, height:120, alignment: .center)
            } else {
                Image(systemName: "photo")
                .resizable()
                .scaledToFit()
                .frame(width:200, height:200, alignment: .center)
            }
 
            }.padding()
           
            Button(action: {
                self.showActionSheet = true
            }) {
                Text("Choose...")
            }.actionSheet(isPresented: $showActionSheet){
                ActionSheet(title: Text("Choose from camera or photo library..."), message: nil, buttons: [
                    //Button1
                    
                    .default(Text("Camera"), action: {
                        self.showImagePicker = true
                        self.sourceType = .camera
                    }),
                  
                    .default(Text("Photo Library"), action: {
                        self.showImagePicker = true
                        self.sourceType = .photoLibrary
                    }),
                    
                   
                    .cancel()
                    
                ])
            }.sheet(isPresented: $showImagePicker){
                imagePicker(image: self.$upload_image, showImagePicker: self.$showImagePicker, sourceType: self.sourceType)
                
            }
            
        
            Button(action: {
               
                if let thisImage = self.upload_image {
                    uploadImage(image: thisImage)
                 
                    
                } else {
                    
                    print("")
                }
                
                 
            }) {
              
                Text("Submit")
                 
                }
            }
 
        }
        
        
    }
    func uploadImage(image:UIImage){
        
        if let imageData = image.jpegData(compressionQuality: 1){
            
            let storage = Storage.storage()
            
            storage.reference().child("photo").putData(imageData, metadata: nil){
                (_, err) in
                if let err = err {
                 print("an error has occurred - \(err.localizedDescription)")
       }
                } else {
                     
                    print("Your photos have been successfully  
                }
            }
        } else {
            print("coldn't unwrap/case image to data")
        }
    }
 
 

struct UploadPhoto_Previews: PreviewProvider {
    static var previews: some View {
        UploadPhoto()
    }
}


 
 

Answer 1

当您将图片上传到 Firebase 时，您必须告诉它您要保存图片的路径。在您的代码中，您将数据放入 storage.reference().child("photo")。如果要存储多张图片，则需要更改“照片”路径，否则会覆盖该路径处的当前图片。我还建议使用子文件夹。

我会这样称呼：

let imageName = "image1"
let folderName = "folder1"
let path = "\(folderName)/\(imageName)"
storage.reference(withPath: path).putData...