缓存数组

用JSON的parse 和 stringify 可以实现缓存数组

uni登录模板的例子

const USERS_KEY = 'USERS_KEY';
const STATE_KEY = 'STATE_KEY';

const getUsers = function () {
    let ret = '';
    ret = uni.getStorageSync(USERS_KEY);
	console.log("ret",ret);
    if (!ret) {
        ret = '[]';
    }
    return JSON.parse(ret);
}

const addUser = function (userInfo) {
    let users = getUsers();
	console.log("users",users);
    users.push({
        account: userInfo.account,
        password: userInfo.password
    });
    uni.setStorageSync(USERS_KEY, JSON.stringify(users));
}
export default {
    getUsers,
    addUser
}