当状态发生变化时，为什么mapStateToProps返回空对象？

Question

我创建动作

export const KIDS_LOAD = 'KIDS_LOAD';
export const kidsLoad = (data) => ({
    type: KIDS_LOAD,
    payload: data ,
});

我创建了减速器

import { KIDS_LOAD } from '../customActions/KidsActions';

export default (state = {}, { type, payload }) => {
    if (type === KIDS_LOAD) {
                return {    ...state,   
                    img: payload.img,
                    kidsInfo: payload.kidsInfo
                };
    }
    return state;
}

我派人行动

componentWillMount() {
                this.props.setSidebarVisibility(true);
                const { kidsLoad, record } = this.props;

                kidsLoad({
                    img : 'https://s18670.pcdn.co/wp-content/uploads/care_about_grades_middle_school.jpg',
                    kidsInfo: {
                        kidName : 'Sasha',
                        kidAge : '19',
                        kidHandType : 'Right',
                        kidGender : 'Boy', 
                    }
                })

                console.log( this.props.kidsTabData)

        }

I映射状态

const mapStateToProps = state => ({
        kidsTabData: state.kidsReducer,
        isLoading: state.admin.loading > 0,
    });
export default connect(mapStateToProps, { setSidebarVisibility, kidsLoad })(withStyles(styles)(MyLayout));

存储已变异

​

但是console.log( this.props.kidsTabData)返回空object {}。

​

​

你能说出我哪里错了吗？在我看来，所有的东西都能正确地放到商店里，但initialState却能拿到道具。

Answer 1

redux操作kidsLoad是异步的。在componentDidUpdate中试用console.log

componentDidUpdate(){
    console.log(this.props.kidsTabData)
}