Trait Hook 

pub trait Hook: Unpin + Send {
    // Provided methods
    fn poll_change(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll<()> { ... }
    fn pre_component_update(&mut self, _updater: &mut ComponentUpdater<'_, '_>) { ... }
    fn post_component_update(&mut self, _updater: &mut ComponentUpdater<'_, '_>) { ... }
    fn pre_component_draw(&mut self, _drawer: &mut ComponentDrawer<'_, '_>) { ... }
    fn post_component_draw(&mut self, _drawer: &mut ComponentDrawer<'_, '_>) { ... }
    fn on_drop(&mut self) { ... }
}

所有自定义 hook 的 trait 基础，定义生命周期相关回调。

• poll_change：异步/响应式副作用轮询，适合 use_future/use_effect 等。
• pre_component_update/post_component_update：组件更新前后钩子。
• pre_component_draw/post_component_draw：组件渲染前后钩子。

通常无需手动实现，除非自定义复杂 hook。

Provided Methods

fn poll_change(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll<()>

fn pre_component_update(&mut self, _updater: &mut ComponentUpdater<'_, '_>)

fn post_component_update(&mut self, _updater: &mut ComponentUpdater<'_, '_>)

fn pre_component_draw(&mut self, _drawer: &mut ComponentDrawer<'_, '_>)

fn post_component_draw(&mut self, _drawer: &mut ComponentDrawer<'_, '_>)

fn on_drop(&mut self)

Implementations on Foreign Types

impl Hook for Vec<Box<dyn AnyHook>>

fn poll_change(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll<()>

fn pre_component_update(&mut self, _updater: &mut ComponentUpdater<'_, '_>)

fn post_component_update(&mut self, _updater: &mut ComponentUpdater<'_, '_>)

fn pre_component_draw(&mut self, _updater: &mut ComponentDrawer<'_, '_>)

fn post_component_draw(&mut self, _updater: &mut ComponentDrawer<'_, '_>)

fn on_drop(&mut self)

Implementors

impl Hook for UseScrollImpl

impl Hook for InsertBeforeHandler

impl Hook for UseAsyncEffectImpl

impl Hook for UseFutureImpl

impl Hook for UsePreviousSizeImpl

impl<T: Send + Unpin> Hook for UseMemoImpl<T>