Does SwiftUI List reuse its cells?

SwiftUI lists are lazy loaded: so they load when you scroll.

See discussion here: https://forums.developer.apple.com/forums/thread/651256

And yes, cells are reused.

Could you show the code ? If data contains thumbnail and HD, it is normal that both are loaded.

What did you expect ? What do you want ?

Could you create another State var, with only thumbnail, and show HD only when tapping the thumbnail ? It all depends on your spec.

Hi, Claude31, thank you for the answer.

So, the model looks like this:

class Item {
    var name: String = ""
    
    @Relationship(deleteRule: .cascade, inverse: \Picture.item)
    var pictures: [Picture] = []
    
    init(name: String = "", pictures: [Picture] = []) {
        self.name = name
        self.pictures = pictures
    }
}

@Model
class Picture {
    
    @Attribute(.externalStorage)
    var imageData: Data?
    var thumbNailData: Data?
    var item: Item?
    
    init(imageData: Data? = nil, thumbNailData: Data? = nil, item: Item? = nil) {
        self.imageData = imageData
        self.thumbNailData = thumbNailData
        self.item = item
    }
}

And the View looks like this:

struct ContentView: View {
    @Query private var items: [Item]
    
    var body: some View {
        NavigationStack {
            List {
                ForEach(items) { item in
                    HStack {
                        if !item.pictures.isEmpty, let pic = item.pictures.first?.thumbNailData, let uiImage = UIImage(data: pic) {
                            
                            Image(uiImage: uiImage)
                                .resizable()
                                .aspectRatio(contentMode: .fill)
                                .frame(width: 80, height: 80)
                                .clipShape(.rect(cornerRadius: 10))
                        }
                        
                        Text(item.name)
                    }
                }
            }
            .navigationTitle("Items: \(items.count)")
        }
    }
    
}

As it appears, it already gets over 300 MB of memory

and while it scrolls, it takes over 3 GB and never goes down.

So am I doing something in a wrong way?