Magento2-自定义控制器引发错误

我创建所示的模块这个职位。但是我自己的控制器不起作用。我收到此错误消息：

可恢复的错误：传递给MP \ MyModule \ Controller \ Index \ CheckUserName :: __ construct（）的参数1必须是Magento \ Framework \ App \ Action \ Context的实例，已给出Magento \ Framework \ ObjectManager \ ObjectManager的实例，在D中调用：\ xampp \ htdocs \ magento2 \ vendor \ magento \ framework \ ObjectManager \ Factory \ AbstractFactory.php在第97行并在D：\ xampp \ htdocs \ magento2 \ app \ code \ mp \ MyModule \ Controller \ Index \ CheckUserName中定义。第35行的php

这是我的控制器代码：

<?php
namespace MP\MyModule\Controller\Index;

class CheckUserName extends \Magento\Framework\App\Action\Action
{
    protected $_logger;
    protected $_objectManager;
    protected $_request;

/*
            \Psr\Log\LoggerInterface $logger, //log injection
            \Magento\Framework\App\Request\Http $request

        $this->_logger = $logger;

        $this->_logger->debug('CheckUserName_Constructor_Begin');

        $this->_request = $request;

        $this->_logger->debug('CheckUserName_Constructor_End');     


        */  

        /**
     * @var \Magento\Framework\View\Result\PageFactory
     */
    protected $resultPageFactory;

    /**
     * @param \Magento\Framework\App\Action\Context $context
     * @param \Magento\Framework\View\Result\PageFactory resultPageFactory
     */
    public function __construct(
        \Magento\Framework\App\Action\Context $context,
        \Magento\Framework\View\Result\PageFactory $resultPageFactory
    )
    {
        parent::__construct($context);
        $this->resultPageFactory = $resultPageFactory;
    }

    public function execute()
    {
        echo "Hello from Checkusername";
    }    
}
 ?>

这是删除var / generation文件夹后的错误消息：

Warning: ltrim() expects parameter 1 to be string, object given in D:\xampp\htdocs\magento2\vendor\magento\framework\Code\Generator\EntityAbstract.php on line 152

Notice: Uninitialized string offset: 0 in D:\xampp\htdocs\magento2\vendor\magento\framework\Autoload\ClassLoaderWrapper.php on line 81

Notice: Uninitialized string offset: 0 in D:\xampp\htdocs\magento2\vendor\composer\ClassLoader.php on line 317

Notice: Uninitialized string offset: 0 in D:\xampp\htdocs\magento2\vendor\composer\ClassLoader.php on line 349 exception 'Magento\Framework\Exception\LocalizedException' with message 'Source class "" for "Magento\Framework\App\Response\Http\Interceptor" generation does not exist.' in D:\xampp\htdocs\magento2\vendor\magento\framework\Code\Generator.php:171 Stack trace: #0 D:\xampp\htdocs\magento2\vendor\magento\framework\Code\Generator.php(100): Magento\Framework\Code\Generator->tryToLoadSourceClass('Magento\\Framewo...', Object(Magento\Framework\Interception\Code\Generator\Interceptor))
#1 D:\xampp\htdocs\magento2\vendor\magento\framework\Code\Generator\Autoloader.php(35): Magento\Framework\Code\Generator->generateClass('Magento\\Framewo...')
#2 [internal function]: Magento\Framework\Code\Generator\Autoloader->load('Magento\\Framewo...')
#3 D:\xampp\htdocs\magento2\vendor\magento\framework\ObjectManager\Factory\AbstractFactory.php(105): spl_autoload_call('Magento\\Framewo...')
#4 D:\xampp\htdocs\magento2\vendor\magento\framework\ObjectManager\Factory\Compiled.php(88): Magento\Framework\ObjectManager\Factory\AbstractFactory->createObject('Magento\\Framewo...', Array)
#5 D:\xampp\htdocs\magento2\vendor\magento\framework\ObjectManager\Factory\Compiled.php(130): Magento\Framework\ObjectManager\Factory\Compiled->create('Magento\\Framewo...')
#6 D:\xampp\htdocs\magento2\vendor\magento\framework\ObjectManager\Factory\Compiled.php(67): Magento\Framework\ObjectManager\Factory\Compiled->get('Magento\\Framewo...')
#7 D:\xampp\htdocs\magento2\vendor\magento\framework\ObjectManager\ObjectManager.php(57): Magento\Framework\ObjectManager\Factory\Compiled->create('Magento\\Framewo...', Array)
#8 D:\xampp\htdocs\magento2\vendor\magento\framework\App\Bootstrap.php(233): Magento\Framework\ObjectManager\ObjectManager->create('Magento\\Framewo...', Array)
#9 D:\xampp\htdocs\magento2\index.php(38): Magento\Framework\App\Bootstrap->createApplication('Magento\\Framewo...')
#10 {main}

在新的CentOS开发环境上部署模块后，删除var / di和var / generation文件夹并重新编译di即可。在此之前，我使用Win Xampp环境。那会带来很多麻烦...

我遇到了同样的问题。经过数小时的毫无意义的调试并从墙上砸了个头，我想出了一个对我来说很好的解决方案。

最后，我将所有动作文件名和类名都重命名为驼峰式，即

从：

D：\ xampp \ htdocs \ magento2 \ app \ code \ mp \ MyModule \ Controller \ Index \ CheckUserName.php

<?php
namespace MP\MyModule\Controller\Index;

class CheckUserName extends \Magento\Framework\App\Action\Action {
...
}

至：

D：\ xampp \ htdocs \ magento2 \ app \ code \ mp \ MyModule \ Controller \ Index \ Checkusername.php

class Checkusername extends \Magento\Framework\App\Action\Action {
...
}

从您的Magento根目录运行以下命令：

php bin/magento setup:di:compile

这将再次编译依赖项注入（DI），您的问题将消失。

您的控制器CheckUserName.php文件如下所示

MP / MyModule / Controller / Index / CheckUserName.php

<?php
namespace MP\MyModule\Controller\Index;

class CheckUserName extends \Magento\Framework\App\Action\Action
{

    /**
     * @var \Magento\Framework\View\Result\PageFactory
     */
    protected $resultPageFactory;

    /**
     * @param \Magento\Framework\App\Action\Context $context
     * @param \Magento\Framework\View\Result\PageFactory resultPageFactory
     */
    public function __construct(
        \Magento\Framework\App\Action\Context $context,
        \Magento\Framework\View\Result\PageFactory $resultPageFactory
    )
    {
        parent::__construct($context);
        $this->resultPageFactory = $resultPageFactory;
    }

    public function execute()
    {
        echo "Hello from Check username";
    }

}

清除缓存。

之后，您可以使用以下网址访问您的控制器

http://192.168.0.52/m2ee/my_module/index/CheckUserName/或 http://192.168.0.52/m2ee/index.php/my_module/index/CheckUserName/

注意：my_module是我的模块的名字，您可以在这里替换您的名字。

见下图pic我这边正在工作

让我知道它是否不起作用。