微信小程序本地存储的异步同步用法详解

妖狐艹你老母 2022-12-11 07:43 192阅读 0赞

[官网:https://developers.weixin.qq.com/miniprogram/dev/api/storage/wx.setStorageSync.html][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) { 
     
      }

1.  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
     }

1.  wx.removeStorageSync(); // 移除指定的值

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

1.  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
     }

1.  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"})

1.  wx.removeStorage(); // 移除指定的值

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

1.  wx.getStorage(); // 获取值

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

1.  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)
     }})

1.  wx.clearStorage(); // 清除所有的key

wx.clearStorage()

[https_developers.weixin.qq.com_miniprogram_dev_api_storage_wx.setStorageSync.html]: https://developers.weixin.qq.com/miniprogram/dev/api/storage/wx.setStorageSync.html