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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>使用promise封装小程序网络请求 | 李祖彬的博客</title>
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<meta name="description" content="请求接口数据：
module.exports = {
request: (params = {url, data}) => {
wx.showLoading({
title: '加载中...',
mask: true
});
r...">
<meta name="keywords" content="小程序,promise,网络请求">
<meta name="author" content="李祖彬">
<link rel="shortcut icon" href="/css/images/favicon.ico">
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<a href="/" id="logo">李祖彬的博客</a>
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<a href="/" id="subtitle">lizubin.com</a>
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<section id="main"><article id="post-promise-in-wechat-miniprogram" class="h-entry article article-type-post" itemprop="blogPost" itemscope itemtype="https://schema.org/BlogPosting">
<div class="article-meta">
<a href="/promise-in-wechat-miniprogram.html" class="article-date">
<time class="dt-published" datetime="2023-06-05T03:32:36.000Z" itemprop="datePublished">2023-06-05</time>
</a>
</div>
<div class="article-inner">
<header class="article-header">
<h1 class="p-name article-title" itemprop="headline name">
使用promise封装小程序网络请求
</h1>
</header>
<div class="e-content article-entry" itemprop="articleBody">
<p>请求接口数据：</p>
<pre class="line-numbers language-none"><code class="language-none">module.exports = {
request: (params = {url, data}) => {
wx.showLoading({
title: '加载中...',
mask: true
});
return new Promise((resolve, reject) => {
wx.request({
url: BaseUrl + params.url,
data: params.data || {},
header: {
'Content-Type': 'application/x-www-form-urlencoded',
// 如果有接口鉴权
'SIGN': getSign(params.data),
'APPKEY': ''
},
method: 'post',
success: (resp) => {
// 根据实际业务调用resolve或者reject
},
fail: (err) => {
console.log(err);
reject(err)
},
complete: () => {
wx.hideLoading();
}
})
})
},
}</code></pre>
<p>项目中会有很多接口，我们可以根据功能模块，再独立封装。比如登录，可以新增一个login.js:</p>
<pre class="line-numbers language-none"><code class="language-none">const {request} = require('request.js');
module.exports = {
login: () => {
// ...
},
logout: () => {
// ...
}
}</code></pre>
<p>文件上传：</p>
<pre class="line-numbers language-none"><code class="language-none">
module.exports = {
upload: ({count = 9, mediaType = ['image', 'video'], sizeType = ['original', 'compressed']} = {}) => {
return new Promise((topResolve, topReject) => {
wx.chooseMedia({
count: count,
mediaType: mediaType,
sizeType: sizeType,
success(res) {
const {tempFiles} = res
const all = [];
for(let i in tempFiles) {
all.push(new Promise((resolve, reject) => {
var upTask = wx.uploadFile({
url: BaseUrl + 'upload api'
filePath: tempFiles[i].tempFilePath,
name: '',
formData: {},
success: (result) => {
resolve(JSON.parse(result.data));
},
fail: (err) => {
reject(err);
}
});
})
)
}
Promise.all(all).then(results => {
topResolve(results);
}).catch(err => {
console.log(err);
topReject(err)
})
}
})
})
}
}</code></pre>
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