How does uniapp implement local login and registration functions?

With the rapid development of mobile Internet, a large number of applications are constantly emerging. These applications all require users to log in and register, and users have more and more ways to log in and register on mobile devices. Among these methods, local login registration is widely used. Its implementation not only facilitates users, but also effectively protects user privacy and security.

This article will briefly describe how uniapp implements local login registration. uniapp is a cross-platform application framework that only needs to be developed once and can be published to multiple platforms (Android, iOS, H5, etc.). With the latest version of uniapp, developers can easily complete local login and registration functions.

1. Pre-knowledge preparation

Before implementing uniapp local login registration, you need to understand uniapp and related technical terms.

1. uniapp: uniapp is a cross-platform application framework based on Vue.js, which can achieve one-time development and multi-end release. uniapp provides a component-based development model and supports the syntax and life cycle of Vue.js. More details can be found in the uni-app official documentation.
2. Vuex: Vuex is a state management library designed specifically for Vue.js, which can share state between components. Through Vuex, we can manage the data flow of all components in the application, thereby realizing data sharing between components. In subsequent implementations, we will apply Vuex knowledge.
3. uni-app plug-in: The uni-app plug-in can enhance the functions of uni-app, which is generally implemented through Vue.js plug-in encapsulation. There are many plug-ins for uni-app, such as: uni-login, uni-verify, etc. We will select appropriate plug-ins during the implementation process to implement the local login and registration function.

2. Implementation steps

1. Create a uniapp project: Use HBuilderX to create a uniapp project and configure the development environment.
2. Install the uni-login plug-in: Enter the command line in the project root directory and run npm install @dcloudio/uni-login to install the uni-login plug-in.
3. Use the uni-login plug-in to implement login registration: In the login interface and registration interface, introduce the templates and methods provided by the uni-login plug-in. Parse the success or failure callback returned by the uni-login plug-in to implement the login registration function.
4. Store the successfully obtained user information in Vuex: Use Vuex to manage the local login status, and store the successfully obtained user information in Vuex for subsequent use.
5. Logout: Implement the logout function, clear the user information saved in Vuex, and return to the login interface.
6. Improve the layout of the login and registration interface: Improve the layout of the login and registration interface by modifying theme styles, icons, buttons, etc.

3. Implementation method

1. Create the uniapp project

Create the uniapp project in HBuilderX, which will not be described here.

2. Install the uni-login plug-in

Enter the command line in the project root directory and run npm install @dcloudio/uni-login. After successful installation, you can see the uni-login plug-in in the project's package.json.

3. Use the uni-login plug-in to implement login registration

In the login page and registration page, add the uni-login template:

<template>
  <view>
    <login
      @login="login"
      passwordStyleType="password"
      :register-show-stop-propagation="false"
      :register-primary-text="&#39;注册（或通过以下方式登录）&#39;"
    />
  </view>
</template>

In Script , register the uni-login template:

import login from '@/components/uni-login/uni-login.vue' // 引入uni-login模板

export default {
  components: {
    login
  },
  methods: {
    // 登录方法
    login(userinfo) {
      console.log(userinfo)
      // 这里可以将获取到的用户信息保存到Vuex中
    }
  }
}

The registration page is the same.

In Script, we can find that after successful login, the user information we can use is passed to the login function. Therefore, we need to save the obtained information into Vuex so that it can be easily obtained and used in subsequent applications.

Create and manage user information in Vuex:

import Vue from 'vue'
import Vuex from 'vuex'

Vue.use(Vuex)

const store = new Vuex.Store({
  state:{
    user:{
      name:'匿名',
      age:0
    }
  },
  mutations:{
    setUser(state, payload) {
      state.user = payload.user
    },
    // 清除用户信息
    clearUser(state) {
      state.user = {}
    }
  }
})

export default store

In the login method, we can save user information through Vuex:

// 登录方法
login(userinfo) {
  console.log(userinfo)
  // 将获取到的用户信息保存到Vuex中，便于后续应用
  this.$store.commit('setUser',{user:userinfo})
  // 登录成功后，进行路由跳转
  $uni.navigateTo({
    url: '/pages/home/home'
  });
}

In the homepage interface, we You can use Vuex to obtain saved user information to achieve data isolation between different users.

export default {
  data() {
    return {
      user: {},
    }
  },
  mounted() {
    this.user = this.$store.state.user
  },
  methods: {},
}

4. Log out

To implement the log out function in the home page interface, just add the corresponding event to the log out button and perform user information in Vuex Just clear it.

// 退出登录方法
logout() {
  // 清除Vuex中保存的用户信息
  this.$store.commit('clearUser')
  // 退出登录后，回到登录界面
  $uni.navigateTo({
    url: '/pages/login/login'
  });
}

5. Improve the layout of the login and registration interface

Using the components, templates, etc. provided by uniapp, you can easily build a cool login and registration interface through CSS styles , logo, tab-bar, etc., can enhance the user experience.

4. Summary

So far we have completed the implementation of the local login and registration function of uniapp. The uni-login plug-in has realized the core functions of our mobile terminal login and registration process, and it Very easy to use. Through the introduction of this article, we have learned about the basic knowledge of uniapp, the use of Vuex, the use of uni-login, etc. We hope it will be helpful to everyone.

In the actual application process, due to different requirements and technical architecture, the implementation methods are also different. However, we can grasp the actual situation, better achieve the effect of local login and registration, and continuously optimize and improve it to enhance the user experience.

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