reactjs – React Redux组件不会更新

我正在尝试使用React Redux(SSR和Thunks)实现auth(注册/注销).当Redux状态更新时,我不知道为什么组件没有更新…

这是应该重新呈现的组件：

class Navbar extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      loggedIn: props.authentication.loggedIn
    };
  }

  render() {
    let links = null;
    if (this.state.loggedIn) {
      links = ...
    } else {
      links = ...
    }

    return (<Toolbar>{links}</Toolbar>)
  }
}

const mapStateToProps = state => {
  return {
    authentication: state.authentication
  }
}

const mapDispatchToProps = dispatch => {
  return {
    signOut: () => {dispatch(userActions.logout())}
  }
}

const AuthNavbar = connect(mapStateToProps, mapDispatchToProps)(Navbar)
export default AuthNavbar;

这是我的减速机：

const reducers = {
  authentication,
  registration,
  alert
}

const todoApp = combineReducers(reducers)
export default todoApp

身份验证减速器：

const authentication = (state = initialState, action) => {
  switch (action.type) {
    ...
    case userConstants.LOGIN_SUCCESS:
      return Object.assign({}, state, {
        loggedIn: true,
        loggingIn: false,
        user: action.user
      });
    ...
    default:
      return state;
  }
}

和行动 – 登录：

function login(email, password) {
  return dispatch => {
    dispatch({type: userConstants.LOGIN_REQUEST, email});
    userService.login(email, password).then(
        user => {
          dispatch({type: userConstants.LOGIN_SUCCESS, user});
        },
        error => {
          dispatch({ type: userConstants.LOGIN_FAILURE });
          dispatch({type: alertActions.error(error)});
        }
   );
  }
}

UserService.login是一个调用和获取api的函数.
看起来Action应该被触发,Redux状态会更新,但组件不会更新：

双重检查Redux Dev Tools – 状态确实已更新,因此我使用连接实用程序的方式一定存在问题？

您将logedin props存储在构造函数内的状态中,该构造函数将在组件的生命周期中仅运行一次.
当一个新的道具回来时,你没有更新状态.

要么直接使用道具：

if (this.props.authentication.loggedIn) {
      links = ...

或者在componentWillReceiveProps更新状态

componentWillReceiveProps(nextProps){
  // update the state with the new props
  this.setState({
      loggedIn: nextProps.authentication.loggedIn
  });
}