getList() {         uni.request({url: "https://unidemo.dcloud.net.cn/api/news",                  method: 'get',dataType: 'json',success: (res) => {console.log(res.data);this.productList = res.data;},                  });},

请求头每次网络请求都要单独设置
返回数据的正确性判断每次都要重复大量代码
返回数据格式有变化需要修改所有网络请求的地方

const baseUrl = 'https://unidemo.dcloud.net.cn'
const request = (url = '', date = {}, type = 'GET', header = {
}) => {return new Promise((resolve, reject) => {uni.request({method: type,url: baseUrl + url,data: date,header: header,dataType: 'json',         }).then((response) => {setTimeout(function() {uni.hideLoading();}, 200);let [error, res] = response;        resolve(res.data);}).catch(error => {let [err, res] = error;reject(err)})});
}
export default request

import request from 'common/request.js'
Vue.prototype.$request = request

this.$request('/api/news', {
// 传参参数名：参数值,如果没有，就不需要传
}).then(res => {
// 打印调用成功回调
console.log(res)
})

<template><view><uni-list v-for="(item,index) in productList" :key="index"><uni-list-item :title="item.author_name" :note="item.title"></uni-list-item></uni-list></view>
</template>
<script>import uniList from "@/components/uni-list/uni-list.vue"import uniListItem from "@/components/uni-list-item/uni-list-item.vue"export default {components: {uniList,uniListItem},data() {return {productList: [],};},onLoad() {this.getList();},methods: {getList() {this.$request('/api/news', {// 传参参数名：参数值,如果没有，就不需要传// "username": "john",// "key": this.searchValue}).then(res => {// 打印调用成功回调console.log(res)this.productList = res;})},}}
</script>
<style>
</style>