IfLetStore

public struct IfLetStore<State, Action, Content> : View where Content : View

A view that safely unwraps a store of optional state in order to show one of two views.

When the underlying state is non-nil, the then closure will be performed with a Store that holds onto non-optional state, and otherwise the else closure will be performed.

This is useful for deciding between two views to show depending on an optional piece of state:

IfLetStore(
  store.scope(state: \SearchState.results, action: SearchAction.results),
  then: SearchResultsView.init(store:),
  else: Text("Loading search results...")
)

And for performing navigation when a piece of state becomes non-nil:

 NavigationLink(
   destination: IfLetStore(
     self.store.scope(state: \.detail, action: AppAction.detail),
     then: DetailView.init(store:)
   ),
   isActive: viewStore.binding(
     get: \.isGameActive,
     send: { $0 ? .startButtonTapped : .detailDismissed }
   )
 ) {
   Text("Start!")
 }


                    
                    
                    init(_:then:else:)

Initializes an IfLetStore view that computes content depending on if a store of optional state is nil or non-nil.

Declaration

Swift

public init<IfContent, ElseContent>(
  _ store: Store<State?, Action>,
  then ifContent: @escaping (Store<State, Action>) -> IfContent,
  else elseContent: @escaping @autoclosure () -> ElseContent
) where Content == _ConditionalContent<IfContent, ElseContent>

Parameters

`store`	A store of optional state.
`ifContent`	A function that is given a store of non-optional state and returns a view that is visible only when the optional state is non-`nil`.
`elseContent`	A view that is only visible when the optional state is `nil`.


                    
                    
                    init(_:then:)

Initializes an IfLetStore view that computes content depending on if a store of optional state is nil or non-nil.

Declaration

Swift

public init<IfContent>(
  _ store: Store<State?, Action>,
  then ifContent: @escaping (Store<State, Action>) -> IfContent
) where Content == IfContent?

Parameters

`store`	A store of optional state.
`ifContent`	A function that is given a store of non-optional state and returns a view that is visible only when the optional state is non-`nil`.

body
Declaration
Swift

public var body: some View { get }