How to change the source code of uniapp

With the rapid development of the mobile Internet, the demand for mobile applications continues to grow, and developing a mobile application requires the support of multiple technologies. Among them, mobile application development framework is an essential technology. With the advancement of technology, there are now many mobile application development frameworks, such as Weex, React Native, Flutter, NativeScript, etc. However, UNIAPP is also a promising mobile application development framework. Today, let’s talk about how to change the source code.

1. Introduction to UNIAPP

Uniapp is a mobile application development framework based on Vue.js. It runs on multiple platforms such as iOS, Android, Huawei and WeChat applets through a set of codes. Uniapp brings a simpler, more efficient and faster development experience to front-end developers, while also greatly reducing development time and costs.

2. Preparation before modifying the source code

Before starting to modify the source code of UNIAPP, we need to first understand the basic architecture and code structure of UNIAPP, so that we can quickly find what we want in the source code. Modified part.

First of all, we can first understand the basic directory structure of UNIAPP. The root directory of UNIAPP includes many folders and files, some of which we need for daily development. Here, we mainly focus on the following folders:

• pages: directory where page code is placed;
• components: directory where component code is placed;
• static: static Resource placement directory;
• unpackage: The compiled and generated app package placement directory.

In these directories, we can find the source code of UNIAPP, which is the source of code modifications.

3. UNIAPP source code modification

1. Modify the page

First, let’s take a look at how to modify the page code. In UNIAPP, all page codes are placed in the pages folder, where we can find the pages that need to be modified. For example, we need to add a button to a page. When the user clicks the button, a prompt box is displayed. We can add a button to the vue file of the page and bind a click event:

<template>
  <view>
    <button @tap="showAlert">显示提示框</button>
  </view>
</template>
<script>
  export default {
    methods: {
      showAlert() {
        uni.showModal({
          title: '提示',
          content: '这是一个提示框',
          showCancel: false
        })
      }
    }
  }
</script>

In this way, we have completed the modification of the page. When the user clicks this button, a prompt box will pop up. .

2. Modify components

Similarly, we can find the components that need to be modified under the components folder. We can add some custom operations, such as adding an animation effect to a component.

<template>
  <view>
    <button class="btn" @tap="shake">摇一摇</button>
  </view>
</template>
<script>
  export default {
    methods: {
      shake() {
        uni.createAnimation({
          duration: 3000,
          timingFunction: 'ease',
        }).translate(10).step().translate(-20).step().translate(20).step().translate(-20).step().translate(20).step().translate(-10).step().step({duration: 200}).translate(0).step();
        uni.showToast({
          title: '摇啊摇，摇到外婆桥！',
          icon: 'none',
          duration: 2000
        });
      }
    }
  }
</script>
<style>
  .btn {
    width: 100%;
    height: 100%;
    border-radius: 10rpx;
    background-color: #80C342;
    color: #ffffff;
  }
</style>

In this way, adding an animation effect to a component can make our application more lively and interesting.

3. Modify API

UNIAPP provides some commonly used APIs, such as uni.request, uni.showToast, uni.showModal, etc. We can modify them according to our own needs. Secondary packaging. For example, we often need to use network requests when developing applications. We can encapsulate a request method to send network requests and return results.

// 封装request方法
function request(url, data, method = 'GET') {
  return new Promise((resolve, reject) => {
    uni.request({
      url,
      data,
      method,
      success: res => {
        resolve(res.data);
      },
      fail: err => {
        reject(err);
      }
    })
  })
}

// 使用封装后的request方法
request('https://www.example.com/test', {
  name: '张三',
  age: 18
}).then(res => {
  console.log(res);
}).catch(err => {
  console.log(err);
})

4. Precautions after modifying the source code

After modifying the source code, we need to pay attention to the following points:

• Try to ensure the modified code logic Correct, does not affect the stability of the application;
• The modified code should be tested to ensure there are no errors;
• If you want to submit the modified code to the code base, you need to consider the code base Version management to ensure that other developers can use your code normally.

In short, UNIAPP is a very excellent mobile application development framework. Through simple code modifications, we can make our applications more lively and interesting. I hope everyone can accumulate more development skills through experience and develop better applications.

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