uniapp 初始化项目

const baseUrl = ‘http://10.92.1.17:6601/videoapi/‘;
//const baseUrl = ‘/videoapi/‘;
//对于 GET 方法，会将数据转换为 query string。例如 { name: ‘name‘, age: 18 } 转换后的结果是 name=name&age=18。
//对于 POST 方法且 header[‘content-type‘] 为 application/json 的数据，会进行 JSON 序列化。
//对于 POST 方法且 header[‘content-type‘] 为 application/x-www-form-urlencoded 的数据，会将数据转换为 query string。
//postJson请求数据存放在requestBody中
const HttpPostJson = (url, data) => {
	//登录后将用户的token存放在缓存中
	let token = "";
	uni.getStorage({
		key: ‘token‘,
		success: function(ress) {
			token = ress.data,
				data.token = ress.data
		}
	});
	let opts = {
		url: baseUrl + url,
		data: data,
		method: ‘POST‘,
		header: {
			"Content-Type": "application/json; charset=UTF-8",
			"token": token
		},
		dataType: ‘json‘
	}
	let promise = new Promise(function(resolve, reject) {
		uni.request(opts).then(
			(res) => {
				resolve(res[1].data)
			}
		).catch(
			(response) => {
				reject(response)
			}
		)
	})
	return promise
};

//get请求
const HttpGet = (url, data) => {
	////登录后将用户的token存放在缓存中
	let token = "";
	uni.getStorage({
		key: ‘token‘,
		success: function(ress) {
			token = ress.data,
				data.token = ress.data
		}
	});
	let opts = {
		url: baseUrl + url,
		data: data,
		method: ‘GET‘,
		header: {
			"token": token
		},
		dataType: ‘json‘
	}
	let promise = new Promise(function(resolve, reject) {
		uni.request(opts).then(
			(res) => {
				resolve(res[1])
			}
		).catch(
			(response) => {
				reject(response)
			}
		)
	})
	return promise
};

//表单提交
const HttpPostForm = (url, data) => {
	//登录后将用户的token存放在缓存中
	let token = "";
	uni.getStorage({
		key: ‘token‘,
		success: function(ress) {
			token = ress.data,
				data.token = ress.data
		}
	});
	let opts = {
		url: baseUrl + url,
		data: data,
		method: ‘POST‘,
		header: {
			"Content-Type": "application/x-www-form-urlencoded; charset=UTF-8",
			"token": token
		},
		dataType: ‘json‘
	}
	let promise = new Promise(function(resolve, reject) {
		uni.request(opts).then(
			(res) => {
				resolve(res[1])
			}
		).catch(
			(response) => {
				reject(response)
			}
		)
	})
	return promise
};

//文件上传(单文件上传)
/**
 * fileType:文件类型，image/video/audio仅支付宝小程序，且必填。
 * fileName:文件对应的 key , 开发者在服务器端通过这个 key 可以获取到文件二进制内容
 * filePath:要上传文件资源的路径
 * formData:HTTP 请求中其他额外的 form data
 * files : 需要上传的文件列表。使用 files 时，filePath 和 name 不生效。
 */
const HttpPostFile = (url, formData, fileName, fileType, filePath) => {
	//登录后将用户的token存放在缓存中
	let token = "";
	uni.getStorage({
		key: ‘token‘,
		success: function(ress) {
			token = ress.data,
				data.token = ress.data
		}
	});
	let opts = {
		url: baseUrl + url,
		formData: formData,
		filePath: filePath,
		fileType: fileType,
		name: fileName,
		method: ‘POST‘,
		header: {
			"Content-Type": "multipart/form-data",
			"token": token
		},
		dataType: ‘json‘
	}
	let promise = new Promise(function(resolve, reject) {
		uni.uploadFile(opts).then(
			(res) => {
				resolve(res[1])
			}
		).catch(
			(response) => {
				reject(response)
			}
		)
	})
	return promise
};

/**
 * 文件下载GET请求
 */
const HttpDownloadFile = (url) => {
	//登录后将用户的token存放在缓存中
	let token = "";
	uni.getStorage({
		key: ‘token‘,
		success: function(ress) {
			token = ress.data,
				data.token = ress.data
		}
	});
	let opts = {
		url: baseUrl + url,
		method: ‘GET‘,
		header: {
			"token": token
		},
		dataType: ‘json‘
	}
	let promise = new Promise(function(resolve, reject) {
		uni.uploadFile(opts).then(
			(res) => {
				resolve(res[1])
			}
		).catch(
			(response) => {
				reject(response)
			}
		)
	})
	return promise
};

export default {
	baseUrl,
	HttpPostForm,
	HttpGet,
	HttpPostJson,
	HttpPostFile,
	HttpDownloadFile
}

<template>
	<view class="content">

	</view>
</template>

<script>
	export default {
		data() {
			return {
				title: ‘Hello‘
			}
		},
		onLoad() {
			let object = {};
			this.http.HttpPostJson(‘login/findImageCode‘, object).then(res => {
				console.log(res);
				//打印请求返回的数据
			}, error => {
				console.log(error);
			})
		},
		methods: {

		}
	}
</script>

<style>
	@import url("index.css");
</style>

import Vue from ‘vue‘
import App from ‘./App‘
import http from ‘./common/http.js‘

Vue.config.productionTip = false
//当前时间
Vue.prototype.now = Date.now || function() {
	return new Date().getTime();
};
//请求接口
Vue.prototype.http = http;
//获取缓存中用户的token
Vue.prototype.token = uni.getStorageSync("token");
//获取用户信息
Vue.prototype.userInfo = uni.getStorageSync("userInfo");

App.mpType = ‘app‘

const app = new Vue({
	...App
})
app.$mount()

　　解决跨域问题

    "h5" : {
        "devServer" : {
            "inline":false,
            "port" : 8080,
            "host" : "0.0.0.0",
            "disableHostCheck" : true,
            "proxy" : {
                "/videoapi" : {
                    "target" : "http://10.92.1.17:6601/",
                    "changeOrigin" : true,
                    "secure" : false,
                    "pathRewrite":{"^/dpc":""}
                }
            }
        },
        "router" : {
            "mode" : "history"
        },
        "optimization" : {
            "treeShaking" : {
                "enable" : true
            }
        }
    }

原文地址：https://www.cnblogs.com/liushuchen/p/11822987.html