问如何使用react native + redux在用户触发的事件上配置'fetch‘URL？

EN

import { connect } from "react-redux";
import actions from "../actions/actions";
import MyWidget from "../components/MyWidget";

export const mapStateToProps = state => {
    return {
        itemDetails: state.itemDetails
    };
};

const pushItem = (dispatch, itemDetails) => {
    fetch("http://xxx.xxx.xxx.xxx:xxxx/myapp/rest/item/" + itemDetails.id, {
        method: "PUT",
        body: itemDetails
    })
        .then(response => {
            dispatch(actions.hideSpinner());
        })
        .catch(error => {
            console.log(error);
            dispatch(actions.hideSpinner());
        });
};

const mapDispatchToProps = dispatch => {
    return {
        saveItem: itemDetails => {
            dispatch(actions.showSpinner());
            pushItem(dispatch, itemDetails);
        }
    };
};

const MyWidgetCtrl = connect(mapStateToProps, mapDispatchToProps)(MyWidget);

export default MyWidgetCtrl;