Initializerswift-composable-architecture 1.18.0ComposableArchitecture

    init(_:observe:send:removeDuplicates:)

    Initializes a view store from a store which observes changes to state.

    ViewStore.swift:148
    iOS
    deprecated
    macOS
    deprecated
    tvOS
    deprecated
    watchOS
    deprecated
    @MainActor init<State, Action>(_ store: Store<State, Action>, observe toViewState: @escaping (_ state: State) -> ViewState, send fromViewAction: @escaping (_ viewAction: ViewAction) -> Action, removeDuplicates isDuplicate: @escaping (_ lhs: ViewState, _ rhs: ViewState) -> Bool)
    Mangled symbol
    s22ComposableArchitecture9ViewStoreC_7observe4send16removeDuplicatesACyxq_GAA0D0Cyqd__qd_0_G_xqd__cqd_0_q_cSbx_xtctcr0_lufc What are these?
    FNV24 hash
    9MG12

    Parameters

    store

    A store.

    toViewState

    A transformation of ViewState to the state that will be observed for changes.

    fromViewAction

    A transformation of ViewAction that describes what actions can be sent.

    isDuplicate

    A function to determine when two State values are equal. When values are equal, repeat view computations are removed.

    It is recommended that the observe argument transform the store’s state into the bare minimum of data needed for the feature to do its job in order to not hinder performance. This is especially true for root level features, and less important for leaf features.

    To read more about this performance technique, read the Performance article.