WordPress如何在文章列表编辑特色图像

在文章列表编辑特色图像，看到这句话大概就知道今天要分享的是什么功能了。

具体效果如下图所示：

这是一个非常实用的功能，它能使我们在WordPress后台编辑文章时方便很多。

如果你的主题不支持缩略图请首先在functions.php中添加

//开启文章缩略图

add_theme_support( \\\\\\\'post-thumbnails\\\\\\\' );

首先我们在后台文章列表添加数组， 复制下面的代码到你的functions.php中。

/*
 * 添加数组到文章列表
 */
add_filter(\\\\\\\'manage_post_posts_columns\\\\\\\', \\\\\\\'lb_featured_image_column\\\\\\\');
function lb_featured_image_column( $column_array ) {
	$column_array = array_slice( $column_array, 0, 1, true )
	+ array(\\\\\\\'featured_image\\\\\\\' => \\\\\\\'特色图像\\\\\\\')
	+ array_slice( $column_array, 1, NULL, true );
 
	return $column_array;
}
 
/*
 * 使用钩子完善数组
 */
add_action(\\\\\\\'manage_posts_custom_column\\\\\\\', \\\\\\\'lb_render_the_column\\\\\\\', 10, 2);
function lb_render_the_column( $column_name, $post_id ) {
	if( $column_name == \\\\\\\'featured_image\\\\\\\' ) {
		if( has_post_thumbnail( $post_id ) ) {
			$thumb_id = get_post_thumbnail_id( $post_id );
			echo \\\\\\\'<img data-id=\\\\\\\"\\\\\\\' . $thumb_id . \\\\\\\'\\\\\\\" src=\\\\\\\"\\\\\\\' . wp_get_attachment_url( $thumb_id ) . \\\\\\\'\\\\\\\" />\\\\\\\';
		} else {
			echo \\\\\\\'<img data-id=\\\\\\\"-1\\\\\\\" src=\\\\\\\"\\\\\\\' . get_stylesheet_directory_uri() . \\\\\\\'/placeholder.png\\\\\\\" />\\\\\\\';
		}
	}
}

然后，我们添加一些CSS样式来美化数组。

add_action( \\\\\\\'admin_head\\\\\\\', \\\\\\\'lb_custom_css\\\\\\\' );
function lb_custom_css(){
 
	echo \\\\\\\'<style>
		#featured_image{
			width:120px;
		}
		td.featured_image.column-featured_image img{
			max-width: 100%;
			height: auto;
		}
 
		/* some styles to make Quick Edit meny beautiful */
		#lb_featured_image .title{margin-top:10px;display:block;}
		#lb_featured_image a.lb_upload_featured_image{
			display:inline-block;
			margin:10px 0 0;
		}
		#lb_featured_image img{
			display:block;
			max-width:200px !important;
			height:auto;
		}
		#lb_featured_image .lb_remove_featured_image{
			display:none;
		}
	</style>\\\\\\\';
 
}

完成以上步骤后，在后台文章就可以查看效果了。

接下来添加JS代码使特色图像可以快速编辑和更新，首先排队加载WordPress默认上传：

add_action( \\\\\\\'admin_enqueue_scripts\\\\\\\', \\\\\\\'lb_include_myuploadscript\\\\\\\' );
function lb_include_myuploadscript() {
	if ( ! did_action( \\\\\\\'wp_enqueue_media\\\\\\\' ) ) {
		wp_enqueue_media();
	}
}

然后在后台文章页面添加快速编辑字段：

add_action(\\\\\\\'quick_edit_custom_box\\\\\\\',  \\\\\\\'lb_add_featured_image_quick_edit\\\\\\\', 10, 2);
function lb_add_featured_image_quick_edit( $column_name, $post_type ) {
 
	if ($column_name != \\\\\\\'featured_image\\\\\\\') return;
	echo \\\\\\\'<fieldset id=\\\\\\\"lb_featured_image\\\\\\\" class=\\\\\\\"inline-edit-col-left\\\\\\\">
		<div class=\\\\\\\"inline-edit-col\\\\\\\">
			<span class=\\\\\\\"title\\\\\\\">特色图像</span>
			<div>
				<a href=\\\\\\\"#\\\\\\\" rel=\\\\\\\"external nofollow\\\\\\\"  rel=\\\\\\\"external nofollow\\\\\\\"  class=\\\\\\\"lb_upload_featured_image\\\\\\\">设置特色图像</a>
				<input type=\\\\\\\"hidden\\\\\\\" name=\\\\\\\"_thumbnail_id\\\\\\\" value=\\\\\\\"\\\\\\\" />
			</div>
			<a href=\\\\\\\"#\\\\\\\" rel=\\\\\\\"external nofollow\\\\\\\"  rel=\\\\\\\"external nofollow\\\\\\\"  class=\\\\\\\"lb_remove_featured_image\\\\\\\">移除特色图像</a>
		</div></fieldset>\\\\\\\';
 
}

最后就是更新保存了，添加下面代码即可。

add_action(\\\\\\\'admin_footer\\\\\\\', \\\\\\\'lb_quick_edit_js_update\\\\\\\');
function lb_quick_edit_js_update() {
 
	global $current_screen;
	if (($current_screen->id != \\\\\\\'edit-post\\\\\\\') || ($current_screen->post_type != \\\\\\\'post\\\\\\\'))
		return;
 
		?><script>
		jQuery(function($){
 
			$(\\\\\\\'body\\\\\\\').on(\\\\\\\'click\\\\\\\', \\\\\\\'.lb_upload_featured_image\\\\\\\', function(e){
				e.preventDefault();
				var button = $(this),
				 custom_uploader = wp.media({
					title: \\\\\\\'设置特色图像\\\\\\\',
					library : { type : \\\\\\\'image\\\\\\\' },
					button: { text: \\\\\\\'设置特色图像\\\\\\\' },
				}).on(\\\\\\\'select\\\\\\\', function() {
					var attachment = custom_uploader.state().get(\\\\\\\'selection\\\\\\\').first().toJSON();
					$(button).html(\\\\\\\'<img src=\\\\\\\"\\\\\\\' + attachment.url + \\\\\\\'\\\\\\\" />\\\\\\\').next().val(attachment.id).parent().next().show();
				}).open();
			});
 
			$(\\\\\\\'body\\\\\\\').on(\\\\\\\'click\\\\\\\', \\\\\\\'.lb_remove_featured_image\\\\\\\', function(){
				$(this).hide().prev().val(\\\\\\\'-1\\\\\\\').prev().html(\\\\\\\'设置特色图像\\\\\\\');
				return false;
			});
 
			var $wp_inline_edit = inlineEditPost.edit;
			inlineEditPost.edit = function( id ) {
				$wp_inline_edit.apply( this, arguments );
 				var $post_id = 0;
				if ( typeof( id ) == \\\\\\\'object\\\\\\\' ) { 
					$post_id = parseInt( this.getId( id ) );
				}
 
				if ( $post_id > 0 ) {
					var $edit_row = $( \\\\\\\'#edit-\\\\\\\' + $post_id ),
							$post_row = $( \\\\\\\'#post-\\\\\\\' + $post_id ),
							$featured_image = $( \\\\\\\'.column-featured_image\\\\\\\', $post_row ).html(),
							$featured_image_id = $( \\\\\\\'.column-featured_image\\\\\\\', $post_row ).find(\\\\\\\'img\\\\\\\').attr(\\\\\\\'data-id\\\\\\\');
 
 
					if( $featured_image_id != -1 ) {
 
						$( \\\\\\\':input[name=\\\\\\\"_thumbnail_id\\\\\\\"]\\\\\\\', $edit_row ).val( $featured_image_id ); // ID
						$( \\\\\\\'.lb_upload_featured_image\\\\\\\', $edit_row ).html( $featured_image ); // 图像 HTML
						$( \\\\\\\'.lb_remove_featured_image\\\\\\\', $edit_row ).show(); // 移除链接
 
					}
				}
 		}
	});
	</script>
<?php
}

这篇WordPress如何在文章列表编辑特色图像的教程到此就结束了，这篇教程由主题笔记原创，本站为转载。

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