Detailed introduction to the relevant knowledge of network requests in uniapp

With the rapid development of mobile Internet, the demand for mobile applications continues to increase, and network requests have become a necessary part of application development. The uniapp framework greatly facilitates developers, encapsulating common network request APIs and greatly reducing development complexity. This article will introduce in detail the knowledge related to network requests in uniapp.

1. uni.request

uni.request is a network request API encapsulated by uniapp and has extremely high flexibility. The API supports multiple request methods, including GET, POST, etc. In addition, the API can also configure request headers and request parameters, making requests more free.

The usage format is as follows:

uni.request({
    url: '请求URL',
    method: '请求方式',
    header: {
        '请求头Key': '请求头Value'
    },
    data: {
        '请求参数Key': '请求参数Value'
    },
    success: res => {
        console.log(res)
    }
})

2. uni.uploadFile

uni.uploadFile is an upload file API encapsulated by uniapp, which is often used to upload pictures, Audio and other multimedia files. The API supports multiple file upload methods, such as file selection, photo upload, etc.

The usage format is as follows:

uni.uploadFile({
    url: '上传URL',
    filePath: '上传文件路径',
    name: '上传文件名称',
    header:{
        '请求头Key': '请求头Value'
    },
    formData:{
        '请求参数Key': '请求参数Value'
    },
    success: res => {
        console.log(res)
    }
})

3. uni.downloadFile

uni.downloadFile is a download file API encapsulated by uniapp, which supports multiple file downloads methods, such as downloading multimedia files such as pictures and audios. The API can also configure request headers and request parameters, making requests more free.

The usage format is as follows:

uni.downloadFile({
    url: '下载URL',
    header:{
        '请求头Key': '请求头Value'
    },
    success: res => {
        console.log(res)
    }
})

The use of the above three APIs is similar to the Ajax asynchronous requests commonly used in traditional front-end JS. They all send requests by configuring request headers, request parameters and other information. . Process request response results through callback functions.

Overall, the API encapsulation of network requests in uniapp is very convenient and can reduce the tedious operations of front-end development. Developers can select the corresponding API to perform network request-related operations according to their needs.

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