反应本来不是通过redux作用重新读取的

Question

我的组件应在用户身份验证时导航：

componentDidUpdate(prevProps, prevState) {
    if (this.props.authenticated) {
      this.props.navigation.navigate('Main')
    }
  }

当我派遣Authlogin时，它应该导致rerender，该级别处理导航：

export const authLogin = (username, password) => {
  return dispatch => {
    dispatch(authStart());
    axios.post(`http://10.0.2.2:8000/api/v1/rest-auth/login/`, {
      username: username,
      password: password
    })
      .then(response => {
        var token = response.data.key;
        try {
          AsyncStorage.setItem('token', token);
        } catch (err) {
          console.log(err)
        }
        dispatch(authSuccess(token));
      })
      .catch(err => {
        dispatch(authFail());
        console.log(err);
      })
  }
}

这是我的还原器：

export default function (state = initialState, action) {
  switch (action.type) {
    case "AUTH_START": {
      return {
        ...state,
        authenticating: true,
      }
    }
    case "AUTH_SUCCESS": {
      return {
        ...state,
        authenticating: false,
        authenticated: true,
        token: action.token,
      }
    }
    case "AUTH_FAIL": {
      return {
        ...state,
        authenticating: false,
        authenticated: false,
      }
    }
    case "AUTH_LOGOUT": {
      return {
        ...state,
        authenticating: false,
        authenticated: false,
        token: null,
      }
    }
    default:
      return state
  }
}

和动作创造者：

export const authStart = () => ({type: "AUTH_START"})
export const authSuccess = token => ({type: "AUTH_SUCCESS", token})
export const authFail = () => ({type: "AUTH_FAIL"})

我的控制台记录了派遣了Redux动作并且状态正在发生变化，但没有进行重新启动。这是整个组件：

import React, { Component } from 'react';
import { View, StyleSheet } from 'react-native';
import { bindActionCreators } from 'redux';
import { connect } from 'react-redux';
import PropTypes from 'prop-types';
import LoginForm from '../components/LoginForm';
import { authLogin } from '../actions/authActions';
export class LoginScreen extends Component {
  handlePress = async (username, password) => {
    await this.props.authLogin(username, password);
  }
  componentDidUpdate(prevProps, prevState) {
    if (this.props.authenticated) {
      this.props.navigation.navigate('Main')
    }
  }
  render() {
    return (
      <View style={styles.loginForm}>
        <LoginForm handlePress={this.handlePress} {...this.props} />
      </View>
    );
  }
}
const mapState = state => {
  return {
    authenticated: state.auth.authenticated
  }
};
const mapDispatch = dispatch => {
  return bindActionCreators({
    authLogin,
  }, dispatch)
};
export default connect(mapState, mapDispatch)(LoginScreen);
LoginScreen.propTypes = {
  authLogin: PropTypes.func.isRequired,
  authenticated: PropTypes.bool.isRequired,
};
const styles = StyleSheet.create({
  loginForm: {
    justifyContent: 'center',
    alignItems: 'center',
    flex: 1
  }
});

这是我的商店：

import {  combineReducers } from 'redux';
import { createStore, applyMiddleware } from 'redux';
import { logger } from 'redux-logger';
import thunk from 'redux-thunk';
import auth from './auth'
const reducer = combineReducers({auth})
const enhancer = applyMiddleware(thunk, logger)
const store = createStore(reducer, enhancer)
export default store

该商店已连接在App.js。

Answer 1

我添加了另一个简化器，该还原立即修复了它。显然，redux不喜欢该组合量（）只有一个参数。

即。更改

const reducer = combineReducers({auth})

to

const reducer = combineReducers({auth, otherReducer})

Answer 2

为什么不将身份验证检查和导航语句放入handingpress（）。

中

handlePress = async (username, password) => {
    await this.props.authLogin(username, password);
    if (this.props.authenticated) {
      this.props.navigation.navigate('Main')
    }
  }

authlogin（）派遣操作和状态已更新后，您可以检查身份验证状态并导航用户。

希望这会有所帮助！