1. uni-app学习（二）

1.1. 好用css记录

1. 一定透明度的背景色background: rgba(255,255,255,.6);

1.2. 好用的代码段

1. store（用户登录）

export default {
    state: {
        hasLogin: false, //登陆状态
        loginProvider: "", //登陆方式 如 微信
        openid: null, //应用id
        address: {}, //收货地址
        userinfo: {
            nickName: "未登录",
            headimg: "../../static/image/logo.png",
            user_id: "123",
            individuality: "爱你一万年",
            address: "北京市西城区中南海大院1号",
            sex: "男",
            area: "北京-北京-东城区"
        } //用户信息
    },
    getters: {
        userinfo(state) {
            return state.userinfo;
        },
        login(state) {
            return state.hasLogin;
        },
        address(state) {
            return state.address;
        }
    },
    mutations: {
        login(state, provider) {
            state.hasLogin = true;
            state.loginProvider = provider;
        },
        logout(state) {
            state.hasLogin = false
            state.openid = null
        },
        setOpenid(state, openid) {
            state.openid = openid
        },
        setAddress(state, address) {
            state.address = address;
        },
        setUserinfo(state, userinfo) {
            state.userinfo = userinfo;
        }
    },
    actions: {
        isLogin: async function(context) {
            return await new Promise((resolve, reject) => {
                var hasLogin = context.state.hasLogin;
                console.log(context)
                if (!hasLogin) {
                    uni.showModal({
                        title: "您还未登陆,立即登陆?",
                        content: "请登陆后进行访问",
                        success(e) {
                            if (e.confirm) {
                                //登陆
                                uni.navigateTo({
                                    url: '../login/login'
                                })
                            } else {
                                context.commit('logout', "退出")
                                console.log(context.state)
                                console.log("放弃登陆")
                            }
                        }
                    })
                    resolve(false)
                } else {
                    resolve(true)
                }
            })

        }
    }
}

1. 窗口宽高

export default{
        state: {
            screen:{
                mode:true,//窗口宽度比高度 长
                height:0,//窗口高度
                width:0,//窗口宽度
            }
        },getters:{
            screen(state){
                    return state.screen;
            }
        },mutations: {
            screen(state,screen){
                var width=screen.width || 720;
                var height=screen.height || 1440;
                var mode=true;
                if(width<height){
                    mode=false;
                }
                state.screen={
                    mode,
                    width,
                    height
                };
            }
            
        },actions: {

        }
}

// 监听窗口宽高变化
(function screenListener(){
    uni.onWindowResize((res) => {
        that.$store.commit('screen',{width:res.size.windowWidth,height:res.size.windowHeight});
//                  console.log('变化后的窗口宽度=' + res.size.windowWidth)
//                  console.log('变化后的窗口高度=' + res.size.windowHeight)
})
})()

1. store汇总 index.js

import Vue from 'vue'
import Vuex from 'vuex'
import user from "./store.js"
import win from "./win.js"
Vue.use(Vuex)

const store = new Vuex.Store({
      modules:{
           user:user,
           win:win
           
      }
})

export default store

1.3. storage封装

var Storage={
    /**
     * 异步存入缓存 可对象可数组
     * k        string              键
     * val      array|object|string 缓存的内容
     * expires  int                 有效期
     */
    set(k,val,expires){
        var type= typeof val;
        var expires=expires || 300;
        return uni.setStorage({key:k,data:{data:val,expires:expires+(Date.parse(new Date())/1000),type:type},success: function () {
            console.log('保存成功')
        }})
    },get(k,Func=function(){}){
        try{
            uni.getStorage({key: k,
            success: function (res) {
                var data=res.data;
                if(data.expires){
                    if(data.expires> (Date.parse(new Date())/1000)){
                        Func(data.data)
                        return data.data;
                    }
                    // uni.removeStorage(k);
                    try {
                        uni.removeStorage(k);
                        } catch (e) {
                                // error
                    }
                }
            }})
            
        }catch(e){
            console.log(e)
            return false;
            //TODO handle the exception
        }
            return false;
        
    },remove(k){
        uni.removeStorage(k);
    },reset(){
        // 获取本地说有缓存信息 删除过期的，超长的，净化系统
        uni.getStorageInfo({    
                success: function (res) {
                    console.log(res.keys);