Let's talk about commonly used data request methods in Uniapp development

Uniapp is a cross-platform development framework that can be developed using HTML, CSS and Javascript. During the development of Uniapp applications, we often need to use data request methods to obtain data from the back-end interface. This article will introduce the commonly used data request methods in Uniapp development.

1. Native request method

The data request function can be implemented using Uniapp’s native wx.request method. The following is an example:

wx.request({
    url: 'https://www.example.com/api',
    data: {
        id: 1
    },
    header: {
        'content-type': 'application/json'
    },
    method: 'GET',
    dataType: 'json',
    success: function (res) {
        console.log(res.data)
    },
    fail: function (res) {
        console.log(res)
    }
})

The above code implements a GET request to the https://www.example.com/api interface. The request parameter is {id: 1}, and the returned data is in json format. Print the output in the console after parsing.

2. unis-ajax plug-in

unis-ajax is one of the commonly used data request plug-ins in Uniapp. It can send requests to the backend and return server responses. How to use As follows:

Install unis-ajax:

Enter the following command in the console:

npm install unis-ajax

Use unis-ajax:

Use unis-ajax when needed Introduced into the page or component, for example:

import ajax from 'unis-ajax'

Then make a request, for example:

ajax.post('https://www.example.com/api', {
    id: 1
}).then((res) => {
    console.log(res)
}).catch((err) => {
    console.log(err)
})

The above code implements sending a POST request to the https://www.example.com/api interface, The request parameter is {id: 1}, and the returned data is output in the console.

3. uni.request encapsulation

Encapsulating wx.request is also a way of Uniapp data request, which can make the request code more concise and easy to understand. The following is an example of request encapsulation:

export default function (options) {
    return new Promise((resolve, reject) => {
        uni.request({
            url: options.url,
            method: options.method || 'GET',
            data: options.data || {},
            header: options.header || {},
            success: res => {
                const result = res.data;
                resolve(result);
            },
            fail: res => {
                const result = res;
                reject(result);
            }
        });
    });
}

The above code implements the encapsulation of uni.request. The request parameters are options, including url, method, data and header, and the returned data is processed through the Promise object. .

Summary

The above introduces the three methods of Uniapp data request, namely the native request method, the unis-ajax plug-in and the encapsulation of wx.request. During the application development process, developers can choose the appropriate data request method according to specific scenarios, or choose their own request method for encapsulation. At the same time, data request is not only a skill that must be mastered in Uniapp application development, but also one of the foundations of subsequent applications. I hope this article will be helpful to you.

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