Laravel 简单实现Ajax滚动加载示例

砸漏

发布于 2020-10-20 11:07:11

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发布于 2020-10-20 11:07:11

文章被收录于专栏：恩蓝脚本恩蓝脚本

开发H5项目的时候我们总是需要用到下拉滚动刷新的方式加载页面。这里用 Laravel 实现一下，直接上代码：

创建模型

这里我们不妨创建一个文章（Post）模型，并且生成测试数据 50 条吧。

php artisan make:model -m

模型Post.php

namespace App;

use Illuminate\Database\Eloquent\Model;

class Post extends Model
{

 public $fillable = ['title','description'];

 
}

迁移文件

use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;

class CreatePostTable extends Migration
{
 /**
  * Run the migrations.
  *
  * @return void
  */
 public function up()
 {
  Schema::create('posts', function (Blueprint $table) {
   $table- increments('id');
   $table- string('title');
   $table- text('description');
   $table- timestamps();
  });
 }

 /**
  * Reverse the migrations.
  *
  * @return void
  */
 public function down()
 {
  Schema::drop("posts");
 }
}

测试数据 ModelFactory.php

$factory- define(App\Post::class, function (Faker\Generator $faker) {
 return [
  'title' =  $faker- sentence,
  'description' =  $faker- paragraph,
 ];
});

填充

<?php

use Illuminate\Database\Seeder;

class DatabaseSeeder extends Seeder
{
 /**
  * Run the database seeds.
  *
  * @return void
  */
 public function run()
 {
  // $this- call(UsersTableSeeder::class);
  factory(App\Post::class, 50)- create();
 }
}

路由

Route::get('my-post', 'PostController@myPost');

控制器

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Http\Requests;
use App\Post;

class PostController extends Controller
{

 public function myPost(Request $request)
 {
  $posts = Post::paginate(6); 

  if ($request- ajax()) {
   $view = view('data',compact('posts'))- render();
   return response()- json(['html'= $view]);
  }

  return view('my-post',compact('posts'));
 }

}

视图文件 resources/view/my-post.php

<!DOCTYPE html 
<html 
<head 
 <title Laravel 分页滚动加载</title 
 <script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js" </script 
 <link href="http://libs.baidu.com/bootstrap/3.0.3/css/bootstrap.min.css" rel="external nofollow" rel="stylesheet" 
 <style type="text/css" 
  .ajax-load{
   background: #e1e1e1;
   padding: 10px 0px;
   width: 100%;
  }
 </style 
</head 
<body 

<div class="container" 
 <h2 class="text-center" Laravel 分页滚动加载</h2 
 <br/ 
 <div class="col-md-12" id="post-data" 
  @include('data')
 </div 
</div 

<div class="ajax-load text-center" style="display:none" 
 <p ![](./loader.gif)加载更多……</p 
</div 

<script type="text/javascript" 
 var page = 1;
 $(window).scroll(function() {
  if($(window).scrollTop() + $(window).height() + 1 = $(document).height()) {
   page++;
   loadMoreData(page);
  }
 });

 function loadMoreData(page){
  $.ajax(
   {
    url: '?page=' + page,
    type: "get",
    beforeSend: function()
    {
     $('.ajax-load').show();
    }
   })
   .done(function(data)
   {
    //console.log(data.html);
    if(data.html == " "){
     $('.ajax-load').html("没有数据了……");
     return;
    }
    $('.ajax-load').hide();
    $("#post-data").append(data.html);
   })
   .fail(function(jqXHR, ajaxOptions, thrownError)
   {
    alert('服务未响应……');
   });
 }
</script 

</body 
</html

resources/view/data.php

@foreach($posts as $post)
<div 
 <h3 <a href="" {{ $post- title }}</a </h3 
 <p {{ str_limit($post- description, 400) }}</p 

 <div class="text-right" 
  <button class="btn btn-success" Read More</button 
 </div 

 <hr style="margin-top:5px;" 
</div 
@endforeach

效果：