Dingdong_app/models/barModel.js

import { StatusBar } from "react-native";

export default {
    state: {
        nowBackground: "#FFC21C",
    },
    actions: ({ model, setState }) => ({
        changeBackground(background) {
			const {nowBackground}=model()
            if (nowBackground !== background) {
				StatusBar.setBackgroundColor(background);
				setState({
					nowBackground:background
				})
            }
        },
    }),
};