Thinkphp5跨域问题

关于代码分离可能会遇到json传输接收不到的问题（可能00）

起初我百度到解决此问题可以用jsonp来发送并接受，可是这只是一时之计 以后也会不方便所以我发现了一下方法

在app顶层创建文件common\behavior\CronRun.php 写入以下代码

 <?php
 /**
  * Created by PhpStorm.
  * User: qianglong
  * Date: 2018/1/15
  * Time: 17:56
  */
 namespace app\common\behavior;

 use think\Exception;
 use think\Response;

 class CronRun
 {
     public function run(&$dispatch){
         header("Access-Control-Allow-Origin:*");
         $host_name = isset($_SERVER['HTTP_ORIGIN']) ? $_SERVER['HTTP_ORIGIN'] : "*";
         $headers = [
             "Access-Control-Allow-Origin" => $host_name,
             "Access-Control-Allow-Credentials" => 'true',
             "Access-Control-Allow-Headers" => "x-token,x-uid,x-token-check,x-requested-with,content-type,Host"
         ];
         if($dispatch instanceof Response) {
             $dispatch->header($headers);
         } else if($_SERVER['REQUEST_METHOD'] === 'OPTIONS') {
             $dispatch['type'] = 'response';
             $response = new Response('', 200, $headers);
             $dispatch['response'] = $response;
         }
     }
 }

添加钩子事件

在application \tags下写入

<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006~2016 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------

// 应用行为扩展定义文件
return [
    // 应用初始化
    'app_init'     => [],
    // 应用开始
    'app_begin'    => [
        'app\\common\\behavior\\CronRun'
    ],
    // 模块初始化
    'module_init'  => [],
    // 操作开始执行
    'action_begin' => [],
    // 视图内容过滤
    'view_filter'  => [],
    // 日志写入
    'log_write'    => [],
    // 应用结束
    'app_end'      => [
        'app\\common\\behavior\\CronRun'
    ],
];

这样就能跨域请求api啦！