React Redux - 更改未反映在组件中 [英] React Redux - changes aren't reflected in component

问题描述

我创建了一个简单的 React 组件来生成菜单，我想用 Redux(而不是状态)替换它的可见性切换.

I created a simple React component for generating menu, and I wanted to replace it's visibility toggling with Redux (instead of state).

我的组件如下所示:

class SiteMenu extends React.Component {
  constructor(props) {
    super(props);
  }

  toggle(force = false) {
    let active = !active;

    store.dispatch({
      type: 'TOGGLE',
      active
    });
  }

  render() {
    const wrapperClass = this.props.active ? `${this.props.className}__wrapper ${this.props.className}__wrapper--active` : `${this.props.className}__wrapper`;
    return (
      <nav className={this.props.className} ref="nav">
        <button className={`${this.props.className}__trigger`} onClick={this.toggle.bind(this)}>
          {this.props.active}
        </button>
        <ul className={wrapperClass}>
        </ul>
      </nav>
    );
  }
}

我添加了mapStateToProps:

const mapStateToProps = (store) => {
  return {
    active: store.menuState.active
  }
};

和connect

connect(mapStateToProps)(SiteMenu);

我的商店:

import { createStore } from 'redux';
import reducers from './reducers/index.js';

const store = createStore(reducers, window.devToolsExtension && window.devToolsExtension());
export default store;

和减速器:

import { combineReducers } from 'redux';
import menuReducer from './menu-reducer';

const reducers = combineReducers({
  menuState: menuReducer
});

export default reducers;

<小时>

const initialMenuState = {
  active: false
};

const menuReducer = (state = initialMenuState, action) => {
  switch(action.type) {
    case 'TOGGLE':
      console.log(action);
      return Object.assign({}, state, { active: action.active });
  }

  return state;
};

export default menuReducer;

当我检查我的 Redux DevTools 时，状态正在改变.我该怎么办?

When I check my Redux DevTools, state is changing. What should I do?

存储库中的代码:https://github.com/tomekbuszewski/react-redux

推荐答案

要使用 connect func ，还应该从 react-redux 添加 Provider

to use connect func , also you should add Provider from react-redux

render(<Provider store={store}><Parent /></Provider>, app);

那么你应该将包裹的组件添加到父组件

then you should add wrapped component to Parent component

const SiteMenuWrapped = connect(mapStateToProps)(SiteMenu);

///in Parent component
<Header className="site-header">
      <SiteMenuWrapped 
        className="site-navigation"
        content={this.state.sections}
      />
</Header>

这篇关于React Redux - 更改未反映在组件中的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！