# wx.weixinMiniProgramLogin

call wx.weixinMiniProgramLogin Can evoke WeChat mini program login, access to temporary login credentials (Code)In exchange for user identification information.
In addition, after logging in successfully, you can call WeChat JSAPI (e.g. wx.getMiniProgramCode） Open ability to use WeChat(Cloud development, etc.

# Front preparation

[Multiple application accounts need to bind mobile application accounts](https://dev.weixin.qq.com/docs/framework/Guideline/web/bind-openapp .html)
Need more project.miniapp.json Tick OpenSDK
Configure the evocative WeChat mini program version.
- in app.miniapp.json In, add “authorizeMiniprogramType” Parameter, you can specify the jump Mini Program version (0: Official, 1: Development, 2: Experience)。
Configuration Mini Program Official License Page
- in app.json In, add “useAuthorizePage” Parameter, and set to “true”。 Once configured, the Mini Program inserts the official Mini Program license page at compile time (The official license page does not occupy the code package volume)。

In the WeChat Developer Tool, select "Mini Program Mode," click Preview, and use WeChat to scan the code.

# parameter

# Object object

attribute	type	Required	Introductions
redirectPath	string	no	Specifies the page to which the authorized Mini Program is redirected
success	function	no	Interface calls a successful callback function
fail	function	no	Interface to call a failed callback function
complete	function	no	The callback function at the end of an interface call

# object.success callback

# parameter

# Object res

attribute	type	Introductions
Code	string	User login credentials (valid for five minutes). The developer can call the code2Verifyinfo, Use Code In exchange for user identification information Be careful code2Verifyinfo It's a multi-application. appid And secret, not the Mini Program's. appid and secret

# object.fail callback

# parameter

# Object res

attribute	type	Introductions
errCode	number	Error code
errMsg	string	Error message

**res.errCode **

errCode	Introductions
-1	system error
10001005	Multiterminal Application Unplugged Identity Management
10001008	Multiterminal application unbound development Mini Program
10001016	Multiterminal application module binding development Mini Program error
-700000	Front End Error, errMsg Will give detailed hints

Common Front End Errors

errMsg	guide
sendOpenReq:fail launch wechat fail	Pull up WeChat failed, that is, your multi-terminal application has not yet bound to the mobile application account, resulting in OpenSDK failed. Solutions:[Binding Mobile App Account](https://dev.weixin.qq.com/docs/framework/Guideline/web/bind-openapp .html)

# sample code

wx.weixinMiniProgramLogin ({
  redirectPath:  'pages/Home/index',
  success (res) {
    if (res.code) {
      // Initiate a network request
      wx.request({
        url: 'https://example.com/onLogin',
        data: {
          code: res.code
        }
      })

      // Login After success, you can directly use the cloud development capabilities
      wx.cloud.callFunction({
        name: 'myCloudFunction'
      })

    } else {
      console.log('Login failed! ' + res.errMsg )
    }
  }
})