SwiftUI search | Ask WWDC

To implement search functionality in SwiftUI, you can use the searchable modifier. This modifier allows you to add a search bar to your views, making it easy for users to search through content. Here are some key points and examples from the WWDC sessions:

Basic Search Implementation:
- You can add a searchable modifier to your view, passing a binding to a state property that will hold the search term. This allows you to filter the content based on the search term.
- Example from the session "Migrate your TVML app to SwiftUI":
```
@State private var searchTerm: String = ""

var body: some View {
    List {
        ForEach(items.filter { $0.contains(searchTerm) || searchTerm.isEmpty }, id: \.self) { item in
            Text(item)
        }
    }
    .searchable(text: $searchTerm)
}
```
- Migrate your TVML app to SwiftUI (11:02)
Search Suggestions:
- You can enhance the search experience by providing search suggestions. Use the searchSuggestions modifier to display a list of suggestions based on the current search term.
- Example from the session "Migrate your TVML app to SwiftUI":
```
.searchable(text: $searchTerm) {
    ForEach(suggestions.filter { $0.contains(searchTerm) }, id: \.self) { suggestion in
        Text(suggestion).searchCompletion(suggestion)
    }
}
```
- Migrate your TVML app to SwiftUI (12:42)
Programmatic Focus:
- SwiftUI now offers programmatic access to and control of text selection within text editing controls. You can programmatically drive the focus state of a search field.
- Example from the session "What’s new in SwiftUI":
```
@FocusState private var isSearchFieldFocused: Bool

var body: some View {
    TextField("Search", text: $searchTerm)
        .focused($isSearchFieldFocused)
}
```
- What’s new in SwiftUI (15:06)
Search in Lists:
- The searchable modifier can be applied to lists to make them searchable.
- Example from the session "SwiftUI essentials":
```
List(pets) { pet in
    Text(pet.name)
}
.searchable(text: $searchTerm)
```
- SwiftUI essentials (15:06)

Relevant Sessions

These examples and sessions should help you get started with implementing search functionality in your SwiftUI applications.