javascript - React - Redux - this.props 返回始终未定义

Question

我有以下代码

商店/index.js

const DEFAULT_STATE = {
    auth: { isAuthenticated: false },
    error: { message: null },
    tracks: [],
    uploadedTrack: {}
};

商店/reducers/index.js

import auth from './auth';
import error from './error';
import {tracks, uploadedTrack} from './tracks';

export default combineReducers({
    auth,
    tracks,
    uploadedTrack,
    error
});

store/reducers/tracks.js

import {UPLOADED_TRACK, SET_CURRENT_USER_TRACK} from '../actionTypes';

export const tracks = (state = [], action) => {
    switch(action.type) {
        case SET_CURRENT_USER_TRACK:
            return action.tracks;
        default:
            return state;
    }
}

export const uploadedTrack = (state = {}, action) => {
    switch(action.type) {
        case UPLOADED_TRACK:
            return action.track;
        default:
            return state;
    }
};

商店/actions/tracks.js

export const setTrack = tracks => ({
    type: SET_CURRENT_USER_TRACK,
    tracks
});

export const setUploadedTrack = track => ({
    type: UPLOADED_TRACK,
    track
});

export const getUserTrack = () => {
    return async dispatch => {
        try {
            const {token, ...tracks} = await api.call('get', 'tracks/user');

            dispatch(setTrack(tracks));
            dispatch(removeError());
        } catch (err) {
            const {error} = err.response.data;
            dispatch(addError(error.message));
        }
    };
};

组件/trackList.jsx

componentDidMount() {
        const {getUserTrack} = this.props;
        getUserTrack();
    }

render() {
        var {authType} = this.props;
        const {auth} = this.props;
        const {tracks} = this.props;

        console.log("Track: ", tracks)

一切似乎都有效，因为 Redux 存储上的“tracks”包含我的六个轨道列表，但是当我尝试从控制台上的“tracks”变量打印此信息时，此打印“未定义”。 奇怪的是，我在控制台上的“调用”包含我的六个轨道...... 你能帮助我吗？ 我不知道我的错误在哪里，我尝试应用在网络上找到的解决方案，但没有任何效果。

Answer 1

你能展示如何将你的 redux 状态映射到你的组件吗？如果你的 redux store 包含六个轨道，但你无法在 React 组件中显示它们，问题可能是你如何将你的存储绑定(bind)到你的组件(当你在 components/trackList.txt 中调用 connect() 时)。 jsx)。