how to write a list in swiftui

To write a list in SwiftUI, you can use the List view, which is a powerful and flexible way to display a collection of data. Here are some key points and examples from the WWDC sessions:

Basic List Initialization:

You can initialize a List with a collection of data. This is a convenient way to create a ForEach view, which generates views for each element in the collection and provides them to its container.

Example:

struct Pet: Identifiable {
    let id = UUID()
    let name: String
}

let pets = [Pet(name: "Whiskers"), Pet(name: "Rufus"), Pet(name: "Bubbles")]

struct PetListView: View {
    var body: some View {
        List(pets) { pet in
            Text(pet.name)
        }
    }
}

Customizing Lists:

Lists can be customized through the use of view modifiers. For example, you can add swipe actions to each row.

Example:

struct PetListView: View {
    var body: some View {
        List(pets) { pet in
            Text(pet.name)
                .swipeActions {
                    Button("Delete") {
                        // Handle delete action
                    }
                    .tint(.red)
                }
        }
    }
}

Using ForEach within a List:

You can also create a list by manually writing out a set of views or by using a ForEach view.

Example:

struct PetListView: View {
    var body: some View {
        List {
            ForEach(pets) { pet in
                Text(pet.name)
            }
        }
    }
}

Searchable Lists:

You can make a list searchable by adding the searchable modifier.

Example:

struct PetListView: View {
    @State private var searchTerm = ""

    var body: some View {
        List {
            ForEach(pets.filter { searchTerm.isEmpty || $0.name.contains(searchTerm) }) { pet in
                Text(pet.name)
            }
        }
        .searchable(text: $searchTerm)
    }
}

For more detailed information, you can refer to the following sessions from WWDC:

These sessions cover the basics of creating and customizing lists in SwiftUI, as well as more advanced topics like composition and state management.