微信小程序 POST请求（网络请求）详解及实例代码

<img src="/UploadFiles/2021-04-02/20161017170933243">

按照文档,肯定是这么写.那就入坑了.


1. 'Content-Type': 'application/json'用在get请求中没问题.


POST请求就不好使了.需要改成: "Content-Type": "application/x-www-form-urlencoded"
2016.11.10更新:有同学在将content-type 修改为小写后,post请求成功.
2. 加上method: "POST"


3.data: { cityname: "上海", key: "1430ec127e097e1113259c5e1be1ba70" }写成json格式这样也是请求不到数据的.需要转格式.


下面直接贴代码:


 3.1




<span style="font-size:24px;">//index.js 
//获取应用实例 
var app = getApp() 
Page( { 
 data: { 
  toastHidden: true, 
  city_name: '', 
 }, 
 onLoad: function() { 
  that = this; 
  wx.request( { 
   url: "http://op.juhe.cn/onebox/weather/query", 
   header: { 
    "Content-Type": "application/x-www-form-urlencoded" 
   }, 
   method: "POST", 
   //data: { cityname: "上海", key: "1430ec127e097e1113259c5e1be1ba70" }, 
   data: Util.json2Form( { cityname: "上海", key: "1430ec127e097e1113259c5e1be1ba70" }), 
   complete: function( res ) { 
    that.setData( { 
     toastHidden: false, 
     toastText: res.data.reason, 
     city_name: res.data.result.data.realtime.city_name, 
     date: res.data.result.data.realtime.date, 
     info: res.data.result.data.realtime.weather.info, 
    }); 
    if( res == null || res.data == null ) { 
     console.error( '网络请求失败' ); 
     return; 
    } 
   } 
  }) 
 }, 
 onToastChanged: function() { 
  that.setData( { toastHidden: true }); 
 } 
}) 
var that; 
var Util = require( '../../utils/util.js' );</span> 



3.2




<span style="font-size:24px;"><!--index.wxml--> 
<view class="container"> 
  <toast hidden="{{toastHidden}}" bindchange="onToastChanged"> 
    {{toastText}} 
  </toast> 
  <view>{{city_name}}</view> 
  <view>{{date}}</view> 
  <view>{{info}}</view> 
</view></span> 



3.3




<span style="font-size:24px;">//util.js 
function json2Form(json) { 
  var str = []; 
  for(var p in json){ 
    str.push(encodeURIComponent(p) + "=" + encodeURIComponent(json[p])); 
  } 
  return str.join("&"); 
} 
module.exports = { 
 json2Form:json2Form, 
}</span> 







希望对大家有帮助.