微信小程序数据存储、参数传递和数据缓存对的方法(微信小程序,编程语言)

先上GIF:

1.APP.js

我把常用且不会更改的参数放在APP.js的data里面了.在各个page中都可以拿到var app = getApp();

app上就可以拿到存在data中的参数.

2. wx.navigateTo({})中URL携带参数

demo中已经写出:

wx.navigateTo({url:"../newpage/newpage?infofromindex="+this.data.infofromindex,});

页面间传递参数的笔记

3.wx.setStorage(OBJECT) 数据缓存

微信开发文档中的数据缓存方法:

①存储数据

try{wx.setStorageSync('infofrominput',this.data.infofrominput)}catch(e){}

②获取数据

//获取wx.getStorage({key:'infofrominput',success:function(res){_this.setData({infofromstorage:res.data,})}})

key是本地缓存中的指定的 key,data是需要存储的内容.

详情见微信小程序开发文档:文档

贴上代码:

1.index.js

//index.js//获取应用实例varapp=getApp()Page({data:{info:app.data.info,infofromindex:'来自index.js的信息',infofrominput:''},onLoad:function(){},//跳转到新页面gotonewpage:function(){wx.navigateTo({url:"../newpage/newpage?infofromindex="+this.data.infofromindex,});},//获取输入值searchInputEvent:function(e){console.log(e.detail.value)this.setData({infofrominput:e.detail.value})},//保存参数saveinput:function(){try{wx.setStorageSync('infofrominput',this.data.infofrominput)}catch(e){}}})

2.index.wxml

<!--index.wxml--><view><buttonbindtap="gotonewpage">跳转</button><inputplaceholder="请输入需要保存的参数"bindinput="searchInputEvent"/><buttonbindtap="saveinput">存入Storage</button></view>

3.newpage.js

//newpage.js//获取应用实例varapp=getApp()Page({data:{infofromapp:app.data.infofromapp,infofromindex:'',infofromstorage:'',},onLoad:function(options){var_this=this;varinfofromindex=options.infofromindex;this.setData({infofromindex:infofromindex})//获取wx.getStorage({key:'infofrominput',success:function(res){_this.setData({infofromstorage:res.data,})}})}})

4.newpage.wxml

<!--newpage.wxml--><view>infofromapp:{{infofromapp}}</view><view>infofromindex:{{infofromindex}}</view><view>infofromstorage:{{infofromstorage}}</view>

5.app.js

//app.jsApp({data:{infofromapp:'来自APP.js的信息'},onLaunch:function(){}})