在我componentDidMount()
的 API 调用中,我调用了一些数据,然后这个调用设置了一个我在渲染中使用的状态对象。
componentDidMount() {
const { actions } = this.props;
this.increase = this.increase.bind(this);
// api call from the saga
actions.surveyAnswersRequest();
// set breadcrumb
actions.setBreadcrumb([{ title: 'Score' }]);
actions.setTitle('Score');
this.increase();
}
在我的渲染函数中,我将一些 prop 值传递到视图文件中:
render() {
const { global, gallery, survey_answers, survey, survey_actual_answers } = this.props;
if (global.isFetching) {
return <Loading />;
}
return this.view({ gallery, survey_answers, survey, survey_actual_answers });
}
我遇到的问题是survey_actual_answers
在第一次加载页面时没有设置 prop,但是当我刷新页面时,prop 返回的数据很好,脚本的其余部分将运行。这只是第一次为该 prop 值返回一个空数组。
这是我传递props的方式:
Score.propTypes = {
actions: PropTypes.object.isRequired,
global: PropTypes.object.isRequired,
survey: PropTypes.object.isRequired,
survey_answers: PropTypes.object.isRequired,
gallery: PropTypes.object.isRequired,
survey_actual_answers: PropTypes.array.isRequired,
survey_score_system: PropTypes.array.isRequired,
survey_styles: PropTypes.object.isRequired,
survey_general_doc_data: PropTypes.object.isRequired
};
function mapStateToProps(state, ownProps) {
return {
...ownProps,
global: state.global,
gallery: state.gallery,
survey: state.survey,
survey_actual_answers: state.survey.survey_actual_answers,
survey_answers: state.survey.survey_answers,
survey_score_system: state.survey.survey_score_system,
survey_styles: state.survey.survey_styles,
survey_general_doc_data: state.survey.survey_general_doc_data,
isFetching: state.isFetching
};
}
function mapDispatchToProps(dispatch) {
return {
actions: bindActionCreators({
...globalActions,
...galleryActions,
...surveyActions
}, dispatch)
};
}
有谁知道为什么会这样?就好像它根本没有调用 componentDidMount 一样。