微信小程序本地存储的异步同步用法详解

官网:https://developers.weixin.qq.com/miniprogram/dev/api/storage/wx.setStorageSync.html

一：同步

1. wx.setStorageSync(); //存储值

 try {
    
    
   wx.setStorageSync('key', 'value')
 } catch (e) {
    
    
 
  }

2. wx.getStorageSync(); // 获取值

 try {
    
    
  var value = wx.getStorageSync('key')
   if (value) {
    
    
    // Do something with return value
   }
 } catch (e) {
    
    
   // Do something when catch error
 }

3. wx.removeStorageSync(); // 移除指定的值

 try {
    
    
   wx.removeStorageSync('key')
 } catch (e) {
    
    
   // Do something when catch error
 }

4. wx.getStorageInfoSync(); // 获取当前 storage 中所有的 key

try {
    
    
  const res = wx.getStorageInfoSync()
   console.log(res.keys)
  console.log(res.currentSize)
  console.log(res.limitSize)
 } catch (e) {
    
    
   // Do something when catch error
 }

5. wx.clearStorageSync(); // 清除所有的key

 try {
    
    
  wx.clearStorageSync()
 } catch(e) {
    
    
   // Do something when catch error
 }

二、异步

（1）wx.setStorage(); //存储值
单个 key 允许存储的最大数据长度为 1MB，所有数据存储上限为 10MB。

wx.setStorage({
    
    
 key:"key",
 data:"value"})

2. wx.removeStorage(); // 移除指定的值

 wx.removeStorage({
    
    
  key: 'key',
  success (res) {
    
    
    console.log(res)
      }})

3. wx.getStorage(); // 获取值

 wx.getStorage({
    
    
  key: 'key',
   success (res) {
    
    
    console.log(res.data)
   }})

4. wx.getStorageInfo(); // 获取当前 storage 中所有的 key

wx.getStorageInfo({
    
    
  success (res) {
    
    
      console.log(res.keys)
   console.log(res.currentSize)
   console.log(res.limitSize)
 }})

5. wx.clearStorage(); // 清除所有的key

wx.clearStorage()