微信小程序(十)实战——请求后台数据(微信小程序+laravel)

1.刚开始是本地测试链接数据库,传递死数据,为了将前后流程走通,也就是给定一个数据

                                        从前台——》到后台——》前台显示;

2.现在我们是实战,直接干;

①本地测试为了方便,页面加载就请求后台数据

请求服务器:.js

 onLoad: function (options) {
      var that = this;//=====注意此处,要用that 指代this=====
      wx.request({
    url: 'http://localhost:8000/wxApp/showMentors', //服务器地址
    method: 'get',// OPTIONS, GET, HEAD, POST, PUT, DELETE, TRACE, CONNECT
    data: {
      },
    header: {// 设置请求的 header
          'content-type': 'application/json'
    },
    success: function (res) {
          console.log(res);
          that.setData({ //======不能直接写this.setDate======
        message: res.data, //在相应的wxml页面显示接收到的数据
      });
    }
  })
}, 

这里需要注意的是服务器地址URL:即接口:http://localhost:8000/wxApp/showMentors

在浏览器中也可以直接访问:


说明:我是在本地测试+laravel框架,所以我的URL是:本地虚拟域名+路由:http://localhost:8000/wxApp/showMentors

路由:访问方法(laravel的路由)

Route::group(array('prefix'=>'wxApp'),function(){
    Route::get('/showMentors','WxApp\MentorController@showMentors');//老师列表
});

方法:查询所需数据传递到页面(laravel中路由->方法)

public function showMentors(){
    $mentorList = DB::table('mentor_infos_view')
        ->where('if_vip',1)
        ->where('user_id','!=',$this->uid)
        ->get();
    echo json_encode($mentorList);
}

接收:页面接收  .js

success : function (res ) {
that .setData ({ //======不能直接写this.setDate======
message : res .data , //在相应的wxml页面显示接收到的数据
});
}

显示: 页面显示.wxml

<!-- 接收数据循环 -->
< view wx:for= "{{message}}" wx:for-item= "j" wx:key= "id" name= "info_border" >
<!-- 判断是否有头像 -->
< view wx:if= "{{j.mentor_image_uri==null}}" >
< image class= "widget_arrow" src= "http://dev.cfo-mentor.com/menter/public/assets/images/avatar_default.png" mode= "aspectFill" >
</ image >
</ view >
< view wx:else >
< image class= "widget_arrow" src= "{{j.mentor_image_uri}}" mode= "aspectFill" ></ image >
</ view >
<!-- 显示 -->
< view class= 'info' >姓名:{{j.mentor_name}} </ view >
< view class= 'info' >职位:{{j.career}} </ view >
< view class= 'info' >公司:{{j.company_name}} </ view >
< view class= 'info' >地区:{{j.address}} </ view >
< view class= 'info' >擅长:{{j.mentor_skills}} </ view >
< navigator url= '../../pages/info/info?user_id={{j.user_id}}' >详情 </ navigator >
< view class= 'hr' ></ view >
</ view >

效果:

跳转到详情页面:

①首先需要创建小程序页面(在app.js中添加 "pages/info/info",

       效果:

②再创建连接:在小程序中navigator标签相当于a标签

< navigator url= '../../pages/info/info?user_id={{j.user_id}}' >详情 </ navigator >

说明:带参数和以前一样?XX={{XX}},URL就是前面创建的info中的info.js


③在新页面接收数据:     

data : {
user_id : ""
},

④在onload中加载请求:

onLoad : function (options ) {
var that = this ;
wx .request ({
url : 'http://localhost:8000/wxApp/showMentorInfo' , //服务器地址
method : 'get' ,
data : {
user_id : options .user_id ,
},
header : {
'content-type' : 'application/json'
},
success : function (res ) {
that .setData ({
showMentorInfo : res .data ,
});
}
})
},

请求地址: url: 'http://localhost:8000/wxApp/showMentorInfo', //在laravel中就是到路由;

请求方式:method: 'get',

请求参数: data: {
        user_id : options.user_id,

      },

请求头:header: {

        'content-type': 'application/json'

      },

⑤在laravel中创建路由

Route::group(array('prefix'=>'wxApp'),function(){
    Route::get('/showMentorInfo','WxApp\MentorController@showInfo');//老师个人信息
});

⑥在创建方法

public function showInfo()
{
    $user_id=$_REQUEST['user_id'];
    $showMentorInfo = DB::table('mentor_infos_view')
        ->where('if_vip',1)
        ->where('user_id',$user_id)
        ->first();
    echo json_encode($showMentorInfo);
}

⑦在success里面接收数据

success : function (res ) {
that .setData ({
showMentorInfo : res .data ,
});
}

⑧在.wxml里面显示数据

< view wx:if= "{{j.mentor_image_uri==null}}" >
< image class= "widget_arrow" src= "http://dev.cfo-mentor.com/menter/public/assets/images/avatar_default.png" mode= "aspectFill" >
</ image >
</ view >
< view wx:else >
< image class= "widget_arrow" src= "{{j.mentor_image_uri}}" mode= "aspectFill" ></ image >
</ view >
< view class= 'info' >姓名:{{showMentorInfo.mentor_name}} </ view >
< view class= 'info' >电话:{{showMentorInfo.mentor_phone}} </ view >
< view class= 'info' >职位:{{showMentorInfo.career}} </ view >
< view class= 'info' >公司:{{showMentorInfo.company_name}} </ view >
< view class= 'info' >地区:{{showMentorInfo.address}} </ view >
< view class= 'info' >擅长:{{showMentorInfo.mentor_skills}} </ view >
< view class= 'info' >偏好:{{showMentorInfo.mentor_prefer}} </ view >
< view class= 'info' >导师介绍:{{showMentorInfo.mentor_ps}} </ view >
< view class= 'hr' ></ view >

效果:


刚入门,如有错误,欢迎指出,感谢!!!


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转载自blog.csdn.net/qq_38191191/article/details/80944598