SwiftUI delete rows from a list

Question

As you can see from the image I have a list of colors, I would like to be able to also give the possibility to delete a color from the array.

I tried

Answer 1

The problem is that in your List, the id you give it is \.offset. However, since you are removing data from bgColors, so this data can change. Instead, you should set the id as \.element because it will be constant for each color.

Consider this simplified example, which crashes when you remove a Color from the list:

struct ContentView: View {
    
    @State private var arr: [Color] = [.red, .green, .blue]

    var body: some View {
        List {
            ForEach(Array(arr.enumerated()), id: \.offset) { (index, _) in
                ColorPicker("Color", selection: $arr[index])
            }
            .onDelete(perform: delete)
        }
    }
    
    private func delete(at offsets: IndexSet) {
        arr.remove(atOffsets: offsets)
    }
}

And the working example, where the changes are the id given to the List, and the new Binding to the color:

struct ContentView: View {

    @State private var arr: [Color] = [.red, .green, .blue]

    var body: some View {
        List {
            ForEach(Array(arr.enumerated()), id: \.element) { (index, _) in
                ColorPicker(
                    "Color",
                    selection: Binding<Color>(
                        get: { arr[index] },
                        set: { arr[index] = $0 }
                    )
                )
            }
            .onDelete(perform: delete)
        }
    }

    private func delete(at offsets: IndexSet) {
        arr.remove(atOffsets: offsets)
    }
}