为什么激活我的新Magento主题时没有显示 - Why isn't my new Magento theme showing when I activate it?

Why isn't my new Magento theme showing when I activate it?

我创建了这些目录：

-.app  -设计    -前端      -供应商        -主题            -主题.xml          -媒体            -预览.jpg

主题加载在后端设计列表中，但是当我激活它时，前端上什么都没有显示。

怎么了？

我从Magento.StackExchange找到了解决方案：

app/design/frontend/Magento/mytheme/theme.xml

<theme xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Config/etc/theme.xsd">
     <title>My theme</title> <!-- your theme's name -->
     <parent>Magento/blank</parent> <!-- the parent theme, in case your theme inherits from an existing theme -->
     <media>
         <preview_image>media/preview.jpg</preview_image> <!-- the path to your theme's preview image -->
     </media>
 </theme>

app/design/frontend/Magento/mytheme/composer.json

{
    "name": "magento/theme-frontend-blank",
    "description": "N/A",
    "require": {
        "php": "~5.5.0|~5.6.0|~7.0.0",
        "magento/theme-frontend-blank": "100.0.*",
        "magento/framework": "100.0.*"
    },
    "type": "magento2-theme",
    "version": "100.0.1",
    "license": [
        "OSL-3.0",
        "AFL-3.0"
    ],
    "autoload": {
        "files": [
            "registration.php"
        ]
    }
}

app/design/frontend/Magento/mytheme/registration.php

<?php
/**
* Copyright © 2015 Magento. All rights reserved.
* See COPYING.txt for license details.
*/
'Magento'Framework'Component'ComponentRegistrar::register(
    'Magento'Framework'Component'ComponentRegistrar::THEME,
    'frontend/Magento/mytheme',
    __DIR__
);