我正在为我的网站使用预制主题。我想在我的首页顶部添加一个猫头鹰轮播，以显示我网站上上个月最受欢迎的帖子。预制主题已经带有猫头鹰旋转木马。所以我的问题是现在如何将轮播添加到我的首页？我在插件文件中找到了猫头鹰旋转木马小部件，所以我尝试将该小部件添加到我的首页，但我认为我没有正确添加它，因为没有任何改变。有人对我如何实现这一目标有任何建议吗？
如果需要，这里有我的完整主题文件 - https://www.dropbox.com/s/624p2sdn2i0jsqf/novablogshare.zip?dl=0
我的自定义 front-page.php
<?php
get_header();
the_widget("owl_Widget"); //trying to call the owl carousel widget but it is not working
?>
<script>
var now=2; // when click start in page 2
jQuery(document).on('click', '#load_more_btn', function () {
jQuery.ajax({
type: "POST",
url: "<?php echo get_site_url(); ?>/wp-admin/admin-ajax.php",
data: {
action: 'my_load_more_function', // the name of the function in functions.php
paged: now, // set the page to get the ajax request
posts_per_page: 15 //number of post to get (use 1 for testing)
},
success: function (data) {
if(data!=0){
jQuery("#ajax").append(data); // put the content into ajax container
now=now+1; // add 1 to next page
}else{
jQuery("#load_more_btn").hide();
}
},
error: function (errorThrown) {
alert(errorThrown); // only for debuggin
}
});
});
</script>
<section id="ajax"><!-- i have to change div to section, maybe a extra div declare -->
<?php
$the_query = new WP_Query( [
'posts_per_page' => 15, // i use 1 for testing
'orderby' => 'post_date',
'order' => 'DESC',
'paged' => get_query_var('paged', 1) //page number 1 on load
] );
if ($the_query->have_posts()) {
$i = 0;
$j = 0;
while ($the_query->have_posts()) {
$the_query->the_post();
if ( $i % 5 === 0 ) { // Large post: on the first iteration and every 7th post after... ?>
<div class="row">
<article <?php post_class( 'col-sm-12 col-md-12' ); ?>>
<div class="large-front-container">
<?php the_post_thumbnail('full', array('class' => 'large-front-thumbnail')); ?>
</div>
<div class="front-page-date"><?php echo str_replace('mins', 'minutes', human_time_diff( get_the_time('U'), current_time('timestamp') ) . ' ago'); ?></div>
<div class="front-page-post-title"><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></div>
<p class="front-page-post-excerpt"><?php echo get_the_excerpt(); ?></p>
<div class="front-page-post-info">
<a class="moretext" href="<?php the_permalink(); ?>">Read more</a>
<?php get_template_part( 'includes/front-shop-the-post' ); ?>
<?php get_template_part( 'includes/share-buttons' ); ?>
<div class="front-comments"><?php comments_popup_link ('0', '1', '%', 'comment-count', 'none'); ?></div>
</div>
</article>
</div>
<?php } else { // Small posts ?>
<?php if($j % 2 === 0){ echo '<div class="row">';} ?>
<article <?php post_class( 'col-sm-6 col-md-6' ); ?>>
<div class="two-front-container">
<?php the_post_thumbnail('full', array('class' => 'medium-front-thumbnail')); ?>
<div>
<div class="front-page-date"><?php echo human_time_diff( get_the_time('U'), current_time('timestamp') ) . ' ago'; ?></div>
<div class="front-page-post-title"><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></div>
<p class="front-page-post-excerpt"><?php echo get_the_excerpt(); ?></p>
<div class="front-page-post-info">
<a class="moretext" href="<?php the_permalink(); ?>">Read more</a>
<?php get_template_part( 'includes/front-shop-the-post' ); ?>
<?php get_template_part( 'includes/share-buttons' ); ?>
<div class="front-comments"><?php comments_popup_link ('0', '1', '%', 'comment-count', 'none'); ?></div>
</div>
</article>
<?php $j++; if($j % 2 === 0){ echo '</div>';}?>
<?php
}
$i++;
}?>
<?php
}?>
</section>
<button id="load_more_btn">Load More Posts</button> <!-- button out of ajax container for load content and button displayed at the bottom -->
<?php
get_footer();首页功能
add_action('wp_ajax_my_load_more_function', 'my_load_more_function');
add_action('wp_ajax_nopriv_my_load_more_function', 'my_load_more_function');
function my_load_more_function() {
$query = new WP_Query( [
'posts_per_page' => $_POST["posts_per_page"],
'orderby' => 'post_date',
'order' => 'DESC',
'paged' => get_query_var('paged', $_POST["paged"])
] );
if ($query->have_posts()) {
$i = 0;
$j = 0;
while ($query->have_posts()) {
$query->the_post();
if ( $i % 5 === 0 ) { // Large post: on the first iteration and every 7th post after... ?>
<div class="row">
<article <?php post_class( 'col-sm-12 col-md-12' ); ?>>
<div class="large-front-container">
<?php the_post_thumbnail('full', array('class' => 'large-front-thumbnail')); ?>
</div>
<div class="front-page-date"><?php echo str_replace('mins', 'minutes', human_time_diff( get_the_time('U'), current_time('timestamp') ) . ' ago'); ?></div>
<div class="front-page-post-title"><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></div>
<p class="front-page-post-excerpt"><?php echo get_the_excerpt(); ?></p>
<div class="front-page-post-info">
<a class="moretext" href="<?php the_permalink(); ?>">Read more</a>
<?php get_template_part( 'includes/front-shop-the-post' ); ?>
<?php get_template_part( 'includes/share-buttons' ); ?>
<div class="front-comments"><?php comments_popup_link ('0', '1', '%', 'comment-count', 'none'); ?></div>
</div>
</article>
</div>
<?php } else { // Small posts ?>
<?php if($j % 2 === 0) echo '<div class="row">'; ?>
<article <?php post_class( 'col-sm-6 col-md-6' ); ?>>
<div class="two-front-container">
<?php the_post_thumbnail('full', array('class' => 'medium-front-thumbnail')); ?>
<div>
<div class="front-page-date"><?php echo human_time_diff( get_the_time('U'), current_time('timestamp') ) . ' ago'; ?></div>
<div class="front-page-post-title"><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></div>
<p class="front-page-post-excerpt"><?php echo get_the_excerpt(); ?></p>
<div class="front-page-post-info">
<a class="moretext" href="<?php the_permalink(); ?>">Read more</a>
<?php get_template_part( 'includes/front-shop-the-post' ); ?>
<?php get_template_part( 'includes/share-buttons' ); ?>
<div class="front-comments"><?php comments_popup_link ('0', '1', '%', 'comment-count', 'none'); ?></div>
</div>
</article>
<?php $j++; if($j % 2 === 0) echo '</div>'; ?>
<?php
}
$i++;
}
wp_reset_query();
}else{
return 0;
}
exit;
}owl-carousel.php(位于插件文件夹中)
<?php
/*
Plugin Name: Owl Carousel
Description: A simple plugin to include an Owl Carousel in any post
Author: Pierre JEHAN
Version: 0.5.3
Author URI: http://www.pierre-jehan.com
Licence: GPL2
*/
add_theme_support('post-thumbnails');
add_action('init', 'owlcarousel_init');
add_action('wp_print_scripts', 'owl_register_scripts');
add_action('wp_print_styles', 'owl_register_styles');
add_action('widgets_init', 'owl_widgets_init');
add_action('manage_edit-owl-carousel_columns', 'owl_columnfilter');
add_action('manage_posts_custom_column', 'owl_column');
add_action('admin_menu', 'owl_carousel_menu');
add_action('admin_enqueue_scripts', 'owl_carousel_admin_register_scripts');
if (filter_var(get_option('owl_carousel_wordpress_gallery', false), FILTER_VALIDATE_BOOLEAN)) {
add_filter('post_gallery', 'owl_carousel_post_gallery', 10, 2);
}
// Add functions to create a new attachments fields
add_filter("attachment_fields_to_edit", "owl_carousel_attachment_fields_to_edit", null, 2);
add_filter("attachment_fields_to_save", "owl_carousel_attachment_fields_to_save", null, 2);
/**
* Initilize the plugin
*/
function owlcarousel_init() {
$labels = array(
'name' => __('Owl Carousel', 'owl-carousel-domain'),
'singular_name' => __('Carousel Slide', 'owl-carousel-domain'),
'add_new' => __('Add New Slide', 'owl-carousel-domain'),
'add_new_item' => __('Add New Carousel Slide', 'owl-carousel-domain'),
'edit_item' => __('Edit Carousel Slide', 'owl-carousel-domain'),
'new_item' => __('Add New Carousel Slide', 'owl-carousel-domain'),
'view_item' => __('View Slide', 'owl-carousel-domain'),
'search_items' => __('Search Carousel', 'owl-carousel-domain'),
'not_found' => __('No carousel slides found', 'owl-carousel-domain'),
'not_found_in_trash' => __('No carousel slides found in trash', 'owl-carousel-domain'),
);
register_post_type('owl-carousel', array(
'public' => true,
'publicly_queryable' => false,
'exclude_from_search' => true,
'label' => 'Owl Carousel',
'menu_icon' => plugins_url('/owl-carousel/images/owl-logo-16.png'),
'labels' => $labels,
'capability_type' => 'post',
'supports' => array(
'title',
'editor',
'thumbnail'
)
));
$taxonomy_labels = array(
'name' => __('Carousels', 'owl-carousel-domain'),
'singular_name' => __('Carousel', 'owl-carousel-domain'),
'search_items' => __('Search Carousels', 'owl-carousel-domain'),
'popular_items' => __('Popular Carousels', 'owl-carousel-domain'),
'all_items' => __('All Carousels', 'owl-carousel-domain'),
'parent_item' => null,
'parent_item_colon' => null,
'edit_item' => __('Edit Carousel', 'owl-carousel-domain'),
'update_item' => __('Update Carousel', 'owl-carousel-domain'),
'add_new_item' => __('Add New Carousel', 'owl-carousel-domain'),
'new_item_name' => __('New Carousel Name', 'owl-carousel-domain'),
'separate_items_with_commas' => __('Separate carousels with commas', 'owl-carousel-domain'),
'add_or_remove_items' => __('Add or remove carousels', 'owl-carousel-domain'),
'choose_from_most_used' => __('Choose from the most used carousels', 'owl-carousel-domain'),
'not_found' => __('No carousels found.', 'owl-carousel-domain'),
'menu_name' => __('Carousels', 'owl-carousel-domain'),
);
register_taxonomy('Carousel', 'owl-carousel', array(
'labels' => $taxonomy_labels,
'rewrite' => array('slug' => 'carousel'),
'hierarchical' => true,
'show_admin_column' => true,
));
add_image_size('owl_widget', 180, 100, true);
add_image_size('owl_function', 600, 280, true);
add_shortcode('owl-carousel', 'owl_function');
add_filter("mce_external_plugins", "owl_register_tinymce_plugin");
add_filter('mce_buttons', 'owl_add_tinymce_button');
// Add Wordpress Gallery option
add_option('owl_carousel_wordpress_gallery', 'off');
add_option('owl_carousel_orderby', 'post_date');
}
function owl_carousel_menu() {
add_submenu_page('edit.php?post_type=owl-carousel', __('Parameters', 'owl-carousel-domain'), __('Parameters', 'owl-carousel-domain'), 'manage_options', 'owl-carousel-parameters', 'submenu_parameters');
}
function submenu_parameters() {
$isWordpressGallery = (filter_var(get_option('owl_carousel_wordpress_gallery', false), FILTER_VALIDATE_BOOLEAN)) ? 'checked' : '';
$orderBy = get_option('owl_carousel_orderby', 'post_date');
$orderByOptions = array('post_date', 'title');
echo '<div class="wrap owl_carousel_page">';
echo '<?php update_option("owl_carousel_wordpress_gallery", $_POST["wordpress_gallery"]); ?>';
echo '<h2>' . __('Owl Carousel parameters', 'owl-carousel-domain') . '</h2>';
echo '<form action="' . plugin_dir_url(__FILE__) . 'save_parameter.php" method="POST" id="owlcarouselparameterform">';
echo '<h3>' . __('Wordpress Gallery', 'owl-carousel-domain') . '</h3>';
echo '<input type="checkbox" name="wordpress_gallery" ' . $isWordpressGallery . ' />';
echo '<label>' . __('Use Owl Carousel with Wordpress Gallery', 'owl-carousel-domain') . '</label>';
echo '<br />';
echo '<label>' . __('Order Owl Carousel elements by ', 'owl-carousel-domain') . '</label>';
echo '<select name="orderby" />';
foreach ($orderByOptions as $option) {
echo '<option value="' . $option . '" ' . (($option == $orderBy) ? 'selected="selected"' : '') . '>' . $option . '</option>';
}
echo '</select>';
echo '<br />';
echo '<br />';
echo '<input type="submit" class="button-primary owl-carousel-save-parameter-btn" value="' . __('Save changes', 'owl-carousel-domain') . '" />';
echo '<span class="spinner"></span>';
echo '</form>';
echo '</div>';
}
/**
* List of JavaScript / CSS files for admin
*/
function owl_carousel_admin_register_scripts() {
wp_register_style('owl.carousel.admin.styles', plugin_dir_url(__FILE__) . 'css/admin_styles.css');
wp_enqueue_style('owl.carousel.admin.styles');
wp_register_script('owl.carousel.admin.script', plugin_dir_url(__FILE__) . 'js/admin_script.js');
wp_enqueue_script('owl.carousel.admin.script');
}
/**
* List of JavaScript files
*/
function owl_register_scripts() {
wp_register_script('js.owl.carousel', plugins_url('/owl-carousel/js/owl.carousel.js'));
wp_register_script('js.owl.carousel.script', plugins_url('/owl-carousel/js/script.js'));
wp_enqueue_script('jquery');
wp_enqueue_script('js.owl.carousel');
wp_enqueue_script('js.owl.carousel.script');
}
/**
* List of CSS files
*/
function owl_register_styles() {
wp_register_style('style.owl.carousel', plugins_url('/owl-carousel/css/owl.carousel.css'));
wp_register_style('style.owl.carousel.theme', plugins_url('/owl-carousel/css/owl.theme.css'));
wp_register_style('style.owl.carousel.transitions', plugins_url('/owl-carousel/css/owl.transitions.css'));
wp_register_style('style.owl.carousel.styles', plugins_url('/owl-carousel/css/styles.css'));
wp_enqueue_style('style.owl.carousel');
wp_enqueue_style('style.owl.carousel.theme');
wp_enqueue_style('style.owl.carousel.transitions');
wp_enqueue_style('style.owl.carousel.styles');
}
function owl_register_tinymce_plugin($plugin_array) {
$plugin_array['owl_button'] = plugins_url('/owl-carousel/js/owl-tinymce-plugin.js');
return $plugin_array;
}
function owl_add_tinymce_button($buttons) {
$buttons[] = "owl_button";
return $buttons;
}
/*
* Initialize Owl Widget
*/
function owl_widgets_init() {
register_widget("owl_Widget");
}
class owl_Widget extends WP_Widget {
public function __construct() {
parent::__construct('owl_Widget', 'Owl Carousel', array('description' => __('A Owl Carousel Widget', 'text_domain')));
}
public function form($instance) {
if (isset($instance['title'])) {
$title = $instance['title'];
} else {
$title = __('Widget Carousel', 'text_domain');
}
if (isset($instance['category'])) {
$carousel = $instance['category'];
} else {
$carousel = 'Uncategorized';
}
?>
<p>
<label for="<?php echo $this->get_field_id('title'); ?>"><?php _e('Title:'); ?></label>
<input class="widefat" id="<?php echo $this->get_field_id('title'); ?>" name="<?php echo $this->get_field_name('title'); ?>" type="text" value="<?php echo esc_attr($title); ?>" />
</p>
<p>
<label for="<?php echo $this->get_field_id('category'); ?>"><?php _e('Carousel:'); ?></label>
<input class="widefat" id="<?php echo $this->get_field_id('category'); ?>" name="<?php echo $this->get_field_name('category'); ?>" type="text" value="<?php echo esc_attr($carousel); ?>" />
</p>
<?php
}
public function update($new_instance, $old_instance) {
$instance = array();
$instance['title'] = strip_tags($new_instance['title']);
$instance['category'] = strip_tags($new_instance['category']);
return $instance;
}
public function widget($args, $instance) {
extract($args);
$title = apply_filters('widget_title', $instance['title']);
echo $before_widget;
if (!empty($title))
echo $before_title . $title . $after_title;
echo owl_function(array(category => $instance['category'], singleItem => "true", autoPlay => "true", pagination => "false"));
echo $after_widget;
}
}
/**
* Add custom column filters in administration
* @param array $columns
*/
function owl_columnfilter($columns) {
$thumb = array('thumbnail' => 'Image');
$columns = array_slice($columns, 0, 2) + $thumb + array_slice($columns, 2, null);
return $columns;
}
/**
* Add custom column contents in administration
* @param string $columnName
*/
function owl_column($columnName) {
global $post;
if ($columnName == 'thumbnail') {
echo edit_post_link(get_the_post_thumbnail($post->ID, 'thumbnail'), null, null, $post->ID);
}
}
/**
* Adding our images custom fields to the $form_fields array
* @param array $form_fields
* @param object $post
* @return array
*/
function owl_carousel_attachment_fields_to_edit($form_fields, $post) {
// add our custom field to the $form_fields array
// input type="text" name/id="attachments[$attachment->ID][custom1]"
$form_fields["owlurl"] = array(
"label" => __("Owl Carousel URL"),
"input" => "text",
"value" => get_post_meta($post->ID, "_owlurl", true)
);
return $form_fields;
}
/**
* Save images custom fields
* @param array $post
* @param array $attachment
* @return array
*/
function owl_carousel_attachment_fields_to_save($post, $attachment) {
if (isset($attachment['owlurl'])) {
update_post_meta($post['ID'], '_owlurl', $attachment['owlurl']);
}
return $post;
}
/**
* Plugin main function
* @param type $atts Owl parameters
* @param type $content
* @return string Owl HTML code
*/
function owl_function($atts, $content = null) {
extract(shortcode_atts(array(
'category' => 'Uncategoryzed'
), $atts));
$data_attr = "";
foreach ($atts as $key => $value) {
if ($key != "category") {
$data_attr .= ' data-' . $key . '="' . $value . '" ';
}
}
$lazyLoad = array_key_exists("lazyload", $atts) && $atts["lazyload"] == true;
$args = array(
'post_type' => 'owl-carousel',
'orderby' => get_option('owl_carousel_orderby', 'post_date'),
'order' => 'asc',
'tax_query' => array(
array(
'taxonomy' => 'Carousel',
'field' => 'slug',
'terms' => $atts['category']
)
),
'nopaging' => true
);
$result = '<div id="owl-carousel-' . rand() . '" class="owl-carousel owl-carousel-' . sanitize_title($atts['category']) . '" ' . $data_attr . '>';
$loop = new WP_Query($args);
while ($loop->have_posts()) {
$loop->the_post();
$img_src = wp_get_attachment_image_src(get_post_thumbnail_id(get_the_ID()), get_post_type());
$meta_link = get_post_meta(get_post_thumbnail_id(get_the_ID()), '_owlurl', true);
$result .= '<div class="item">';
if ($img_src[0]) {
$result .= '<div>';
if (!empty($meta_link)) {
$result .= '<a href="' . $meta_link . '">';
}
if ($lazyLoad) {
$result .= '<img class="lazyOwl" title="' . get_the_title() . '" data-src="' . $img_src[0] . '" alt="' . get_the_title() . '"/>';
} else {
$result .= '<img title="' . get_the_title() . '" src="' . $img_src[0] . '" alt="' . get_the_title() . '"/>';
}
if (!empty($meta_link)) {
$result .= '</a>';
}
// Add image overlay with hook
$slide_title = get_the_title();
$slide_content = get_the_content();
$img_overlay = '<div class="owl-carousel-item-imgoverlay">';
$img_overlay .= '<div class="owl-carousel-item-imgtitle">' . $slide_title . '</div>';
$img_overlay .= '<div class="owl-carousel-item-imgcontent">' . wpautop($slide_content) . '</div>';
$img_overlay .= '</div>';
$result .= apply_filters('owlcarousel_img_overlay', $img_overlay, $slide_title, $slide_content, $meta_link);
$result .= '</div>';
} else {
$result .= '<div class="owl-carousel-item-text">' . get_the_content() . '</div>';
}
$result .= '</div>';
}
$result .= '</div>';
/* Restore original Post Data */
wp_reset_postdata();
return $result;
}
/**
* Owl Carousel for Wordpress image gallery
* @param string $output Gallery output
* @param array $attr Parameters
* @return string Owl HTML code
*/
function owl_carousel_post_gallery($output, $attr) {
global $post;
if (isset($attr['orderby'])) {
$attr['orderby'] = sanitize_sql_orderby($attr['orderby']);
if (!$attr['orderby'])
unset($attr['orderby']);
}
extract(shortcode_atts(array(
'order' => 'ASC',
'orderby' => 'menu_order ID',
'id' => $post->ID,
'itemtag' => 'dl',
'icontag' => 'dt',
'captiontag' => 'dd',
'columns' => 3,
'size' => 'thumbnail',
'include' => '',
'exclude' => ''
), $attr));
$id = intval($id);
if ('RAND' == $order)
$orderby = 'none';
if (!empty($include)) {
$include = preg_replace('/[^0-9,]+/', '', $include);
$_attachments = get_posts(array('include' => $include, 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_mime_type' => 'image', 'order' => $order, 'orderby' => $orderby));
$attachments = array();
foreach ($_attachments as $key => $val) {
$attachments[$val->ID] = $_attachments[$key];
}
}
if (empty($attachments))
return '';
// Add item number if not defined
if (!isset($attr['items'])) {
$attr['items'] = '1';
}
$data_attr = "";
foreach ($attr as $key => $value) {
if ($key != "category") {
$data_attr .= ' data-' . $key . '="' . $value . '" ';
}
}
$output .= '<div id="owl-carousel-' . rand() . '" class="owl-carousel" ' . $data_attr . '>';
foreach ($attachments as $id => $attachment) {
$img = wp_get_attachment_image_src($id, 'full');
$meta_link = get_post_meta($id, '_owlurl', true);
$title = $attachment->post_title;
$output .= "<div class=\"item\">";
if (!empty($meta_link)) {
$output .= "<a href=\"" . $meta_link . "\">";
}
$output .= "<img src=\"{$img[0]}\" width=\"{$img[1]}\" height=\"{$img[2]}\" alt=\"$title\" />\n";
if (!empty($meta_link)) {
$output .= "</a>";
}
$output .= "</div>";
}
$output .= "</div>";
return $output;
}我想让轮播看起来像什么 (whowhatwear.com)
我希望我的代码看起来像这样吗？
<div id="slider">
<?php
$carousel_cat = get_theme_mod('carousel_setting','1');
$carousel_count = get_theme_mod('count_setting','4');
$month = date('m');
$year = date('Y');
$new_query = new WP_Query( array('posts_per_page' => $carousel_count, 'meta_key' => 'wpb_post_views_count', 'orderby' => 'meta_value_num', 'order' => 'DESC','monthnum'=>$month,'year'=>$year ));
?>
<?php if ( $new_query->have_posts() ) : ?>
<?php while ( $new_query->have_posts() ) : $new_query->the_post(); ?>
<div class="item">
<?php the_post_thumbnail('popular-posts'); ?>
<h2><a class="popular-category"
<?php
$categories = get_the_category();
if ( ! empty( $categories ) ) {
echo '<a href="' . esc_url( get_category_link( $categories[0]->term_id ) ) . '">' . esc_html( $categories[0]->name ) . '</a>';
}
?></a></h2>
<p>
<a class="popular-excerpt" href="<?php the_permalink(); ?>"><?php echo get_the_excerpt(); ?></a>
</p>
</div>
<?php endwhile; wp_reset_postdata(); ?>
<?php else : ?>
<p><?php _e(); ?></p>
<?php endif; ?>
</div>最佳答案
@user6738171 我相信您不需要 the_widget("owl_Widget"); 只需构建您想要显示的 html(使用 php)，然后像这样使用 JQuery 调用轮播:
jQuery(document).ready(function($){
$(".homepage-slides").owlCarousel({
items: 1,
nav: true,
dots: false,
autoplay: true,
loop: true
});
});
请阅读有关轮播项目正确结构的文档 https://github.com/OwlCarousel2/OwlCarousel2 .如果您需要有关构建轮播的帮助，请告诉我。 :-)
关于javascript - 如何将猫头鹰轮播添加到首页，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/45602836/