更改WordPress主题中的”加载更多”按钮的最佳方法是哪种？

Z时代
2024-01-10
分类：IT

我正在尝试更改Wordpress主题中的按钮。单击该按钮时, 它将显示列表中的更多帖子, 并将其内部文本更改为”正在加载”, 如下所示。

用自定义图片更改它的最好方法是什么？有没有办法提供”加载阶段”的图片？

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#1

你可以获取用于加载的解决方案….与ajax一起使用。你遵循链接”使用AJAX加载更多帖子”中的信息步骤。

步骤1.加载更多按钮-将代码放入examplefile.php文件,

<?php
global $wp_query; // you can remove this line if everything works for you
// don't display the button if there are not enough posts
if (  $wp_query->max_num_pages > 1 )
	echo '<div class="misha_loadmore">More posts</div>'; // you can use <a> as well?>

<style>
.misha_loadmore{
	background-color: #ddd;
	border-radius: 2px;
	display: block;
	text-align: center;
	font-size: 14px;
	font-size: 0.875rem;
	font-weight: 800;
	letter-spacing:1px;
	cursor:pointer;
	text-transform: uppercase;
	padding: 10px 0;
	transition: background-color 0.2s ease-in-out, border-color 0.2s ease-in-out, color 0.3s ease-in-out;  
}
.misha_loadmore:hover{
	background-color: #767676;
	color: #fff;
}</style>

步骤2.使jQuery和myloadmore.js入队。 -将查询参数传递给脚本。

将代码放在functions.php文件中

function misha_my_load_more_scripts() {
	global $wp_query; 
	// In most cases it is already included on the page and this line can be removed
	wp_enqueue_script('jquery');
	// register our main script but do not enqueue it yet
	wp_register_script( 'my_loadmore', get_stylesheet_directory_uri() . '/myloadmore.js', array('jquery') );
	// now the most interesting part
	// we have to pass parameters to myloadmore.js script but we can get the parameters values only in PHP
	// you can define variables directly in your HTML but I decided that the most proper way is wp_localize_script()
	wp_localize_script( 'my_loadmore', 'misha_loadmore_params', array(
		'ajaxurl' => site_url() . '/wp-admin/admin-ajax.php', // WordPress AJAX
		'posts' => json_encode( $wp_query->query_vars ), // everything about your loop is here
		'current_page' => get_query_var( 'paged' ) ? get_query_var('paged') : 1, 'max_page' => $wp_query->max_num_pages
	) );
 	wp_enqueue_script( 'my_loadmore' );
}
add_action( 'wp_enqueue_scripts', 'misha_my_load_more_scripts' );

步骤3.在myloadmore.js文件中, 放入脚本

jQuery(function($){ // use jQuery code inside this to avoid "$ is not defined" error
	$('.misha_loadmore').click(function(){
		var button = $(this), data = {
			'action': 'loadmore', 'query': misha_loadmore_params.posts, // that's how we get params from wp_localize_script() function
			'page' : misha_loadmore_params.current_page
		};
		$.ajax({ // you can also use $.post here
			url : misha_loadmore_params.ajaxurl, // AJAX handler
			data : data, type : 'POST', beforeSend : function ( xhr ) {
				button.text('Loading...'); // change the button text, you can also add a preloader image
			}, success : function( data ){
				if( data ) { 
					button.text( 'More posts' ).prev().before(data); // insert new posts
					misha_loadmore_params.current_page++;
					if ( misha_loadmore_params.current_page == misha_loadmore_params.max_page ) 
						button.remove(); // if last page, remove the button
					// you can also fire the "post-load" event here if you use a plugin that requires it
					// $( document.body ).trigger( 'post-load' );
				} else {
					button.remove(); // if no data, remove the button as well
				}
			}
		});
	});});

步骤4. wp_ajax_＃-这是AJAX处理函数。将其插入到functions.php文件中。

function misha_loadmore_ajax_handler(){
	// prepare our arguments for the query
	$args = json_decode( stripslashes( $_POST['query'] ), true );
	$args['paged'] = $_POST['page'] + 1; // we need next page to be loaded
	$args['post_status'] = 'publish';
	// it is always better to use WP_Query but not here
	query_posts( $args );
	if( have_posts() ) :
		// run the loop
		while( have_posts() ): the_post();
			// look into your theme code how the posts are inserted, but you can use your own HTML of course
			// do you remember? - my example is adapted for Twenty Seventeen theme
			get_template_part( 'template-parts/post/content', get_post_format() );
			// for the test purposes comment the line above and uncomment the below one
			// the_title();
		endwhile;
	endif;
	die; // here we exit the script and even no wp_reset_query() required!
}
add_action('wp_ajax_loadmore', 'misha_loadmore_ajax_handler'); // wp_ajax_{action}add_action('wp_ajax_nopriv_loadmore', 'misha_loadmore_ajax_handler'); // wp_ajax_nopriv_{action}