Implementation of login page developed by uniapp

With the rapid development of mobile Internet, mobile applications are playing an increasingly important role in people's lives. The login page, as a basic function in mobile applications, generally needs to be developed. As a cross-platform framework developed based on vue.js, uniapp greatly simplifies the development of mobile applications. This article will introduce the implementation of the login page developed by uniapp.

1. Data binding

In uniapp, we can use v-model to achieve two-way binding of data. For example, in the login page, we need to bind the username and password entered by the user:

<template>
  <view class="container">
    <view class="input-box">
      <input type="text" v-model="username" placeholder="请输入用户名" />
    </view>
    <view class="input-box">
      <input type="password" v-model="password" placeholder="请输入密码" />
    </view>
    <button class="login-btn" @click="login">登录</button>
  </view>
</template>

<script>
  export default {
    data() {
      return {
        username: '',
        password: ''
      };
    },
    methods: {
      login() {
        // 登录逻辑实现
      }
    }
  };
</script>

2. Style design

Login pages usually need to take into account aesthetics and user experience. uniapp supports the use of flexbox layout and scss syntax, which greatly facilitates the development of page styles. For example, the following is a simple login page style:

<style lang="scss">
  .container {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100vh;
  }

  .input-box {
    width: 80%;
    margin-bottom: 20rpx;

    input {
      width: 100%;
      height: 80rpx;
      border: none;
      border-bottom: 1rpx solid #ddd;
      font-size: 30rpx;
      outline: none;
      box-sizing: border-box;
    }
  }

  .login-btn {
    width: 80%;
    height: 80rpx;
    background-color: #007aff;
    color: #fff;
    border: none;
    border-radius: 20rpx;
    font-size: 32rpx;
    margin-top: 40rpx;

    &:active {
      background-color: #0062cc;
    }
  }
</style>

The effect is as follows:

##Login logic implementation

In uniapp, we can use methods to write functions that handle login events. For the login page, we need to verify whether the user name and password entered by the user are correct, and based on the results, page jumps and prompts for user information. The following is a simple example:

<template>
  <view class="container">
    <view class="input-box">
      <input type="text" v-model="username" placeholder="请输入用户名" />
    </view>
    <view class="input-box">
      <input type="password" v-model="password" placeholder="请输入密码" />
    </view>
    <button class="login-btn" @click="login">登录</button>
  </view>
</template>

<script>
  export default {
    data() {
      return {
        username: '',
        password: ''
      };
    },
    methods: {
      login() {
        if (this.username === 'admin' && this.password === '123456') {
          uni.showLoading({
            title: '登录中'
          });
          setTimeout(() => {
            uni.hideLoading();
            uni.showToast({
              title: '登录成功'
            });
            uni.navigateTo({
              url: '/pages/index/index'
            });
          }, 2000);
        } else {
          uni.showToast({
            title: '用户名或密码错误',
            icon: 'none'
          });
        }
      }
    }
  };
</script>

When the login button is clicked, this method will first determine whether the user name and password entered by the user are correct. If it is correct, a "Logging in" prompt box will pop up and jump to the homepage after 2 seconds. Otherwise, an error message box will pop up.

Summary

This article introduces the implementation of the login page developed by uniapp, which mainly includes three aspects: data binding, style design, and login logic implementation. When developing mobile applications, the login page is a fundamental feature that requires careful consideration of user experience and security. Through uniapp, we can easily implement this function and quickly deploy it to multiple platforms.

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