问题
I am using the following code to currently display a specified amount (24) of my custom post types on WP, as well as using the project categories to filter through the posts dynamically.
<!-- Display Filters for Posts --->
<ul id="filters">
<li><a href="#" data-filter="*" class="selected">Everything</a></li>
<?php
$terms = get_terms("project_categories"); // get all categories, but you can use any taxonomy
$count = count($terms); //How many are they?
if ( $count > 0 ){ //If there are more than 0 terms
foreach ( $terms as $term ) { //for each term:
echo "<li><a href='#' data-filter='.".$term->slug."'>" . $term->name . "</a></li>\n";
//create a list item with the current term slug for sorting, and name for label
}
}
?>
</ul>
<!-- Filter Array --->
<div class="row">
<div class="col-md-12">
<?php $args = array( 'post_type' => 'bw_projects', 'posts_per_page' => 24 ); ?>
<?php $the_query = new WP_Query( $args ); ?>
<?php if ( $the_query->have_posts() ) : ?>
<ul class="img-list" id="isotope-list">
<?php while ( $the_query->have_posts() ) : $the_query->the_post();
$termsArray = get_the_terms( $post->ID, "project_categories" ); //Get the terms for this particular item
$termsString = ""; //initialize the string that will contain the terms
foreach ( $termsArray as $term ) { // for each term
$termsString .= $term->slug.' '; //create a string that has all the slugs
}
?>
<li class="<?php echo $termsString; ?>item project home-project"> <?php // 'item' is used as an identifier (see Setp 5, line 6) ?>
<a href="<?php echo get_permalink( $post->ID ); ?>">
<?php the_post_thumbnail(); ?>
<span class="text-content"><span><img src="<?php the_field('client_logo'); ?>" alt="" class=""></span></span>
</a>
</li> <!-- end item -->
<?php endwhile; ?>
</ul> <!-- end isotope-list -->
<?php endif; ?>
</div>
</div><!-- Close Filter Array --->
This was built using the Isotope filtering, from these intructions with a few modifications. https://www.aliciaramirez.com/2014/03/integrating-isotope-with-wordpress/
UPDATE: After Marissa Comments, this is now how my code looks after the filters.
<?php $args = array( 'post_type' => 'bw_projects', 'posts_per_page' => 18 ); ?>
<?php $the_query = new WP_Query( $args ); ?>
<?php if ( $the_query->have_posts() ) : ?>
<ul class="img-list" id="isotope-list">
<?php $total_posts = wp_count_posts('bw_projects');
$total_posts = $total_posts->publish;
$number_shown = 0; ?>
<?php while ( $the_query->have_posts() ) : $the_query->the_post();
$termsArray = get_the_terms( $post->ID, "project_categories" ); //Get the terms for this particular item
$termsString = ""; //initialize the string that will contain the terms
foreach ( $termsArray as $term ) { // for each term
$termsString .= $term->slug.' '; //create a string that has all the slugs
}
?>
<li class="<?php echo $termsString; ?>item project home-project"> <?php // 'item' is used as an identifier (see Setp 5, line 6) ?>
<a href="<?php echo get_permalink( $post->ID ); ?>">
<?php the_post_thumbnail(); ?>
<span class="text-content"><span><img src="<?php the_field('client_logo'); ?>" alt="" class=""></span></span>
</a>
</li> <!-- end item -->
<?php endwhile; ?>
</ul> <!-- end isotope-list -->
<?php endif; ?>
<?php if ( $number_shown < $total_posts ) { ?>
<div class="loadMore" data-offset="<?php echo $number_shown; ?>" data-total="<?php echo $total_posts; ?>">
Load More
</div>
<?php } ?>
My loadmore file is in this current state:
<?php
global $post;
$the_offset = trim( sanitize_text_field( wp_unslash( $_POST['pOffset'] ) ) );
$the_total = trim( sanitize_text_field( wp_unslash( $_POST['totalPosts'] ) ) );
$args = array( 'post_type' => 'bw_projects', 'posts_per_page' => 12, 'offset' => $the_offset );
$posts_shown = $the_offset; //Increment this every time you display a project
?>
<?php while ( $the_query->have_posts() ) : $the_query->the_post();
$termsArray = get_the_terms( $post->ID, "project_categories" ); //Get the terms for this particular item
$termsString = ""; //initialize the string that will contain the terms
foreach ( $termsArray as $term ) { // for each term
$termsString .= $term->slug.' '; //create a string that has all the slugs
}
?>
<li class="<?php echo $termsString; ?>item project home-project"> <?php // 'item' is used as an identifier (see Setp 5, line 6) ?>
<a href="<?php echo get_permalink( $post->ID ); ?>">
<?php the_post_thumbnail(); ?>
<span class="text-content"><span><img src="<?php the_field('client_logo'); ?>" alt="" class=""></span></span>
</a>
</li> <!-- end item -->
<?php endwhile; ?>
</ul> <!-- end isotope-list -->
<?php endif; ?>
<?php } ?>
<?php //Then check if we've shown all the posts or not, and we're done.
if ( $posts_shown >= $the_total ) { ?>
<div id="all-posts-shown"></div>
<?php } ?>
On the outputted HTML the load more button is bringing in "data-total" and "data-offset"
<div class="loadMore" data-offset="0" data-total="25">
Load More
</div>
When load more is clicked the offset changes to:
<div class="loadMore" data-offset="12" data-total="25">
Load More
</div>
Except i am seeing no extra posts loading? I think i must have missed something.
回答1:
You can use ajax to pull the next round of posts on button click or scroll. If you're still getting the hang of things, button clicks are a bit easier to track.
Before your loop to display posts, find out how many posts there are in total in your custom post type, and a counter to keep track of how many you've shown.
$total_posts = wp_count_posts('bw_projects');
$total_posts = $total_posts->publish;
$number_shown = 0;
Then increment number shown each time you display a project. Then, after your loop, check if you have more projects to display, then add a loadmore button with data attributes storing the offset (how many posts you've already displayed) and the total.
<?php if ( $number_shown < $total_posts ) { ?>
<div class="loadMore" data-offset="<?php echo $number_shown; ?>" data-total="<?php echo $total_posts; ?>">
Load More
</div>
<?php } ?>
Then you can use AJAX to get the next posts. You want to register your AJAX function first:
<?php
/**
* Put the following code in your functions.php file
* get_loadmore is the name of the ajax function we are registering
* projects-loadmore.php is the file with the contents which will be loaded
* when the ajax call is made.
*/
add_action('wp_ajax_get_loadmore', 'get_loadmore');
add_action( 'wp_ajax_nopriv_get_loadmore', 'get_loadmore' );
function get_loadmore() {
include(get_template_directory().'/projects-loadmore.php');
wp_die();
}
?>
Then you want to set up your ajax function on button click
<script>
/**---
Notes:
When loadMore button is clicked
This passes information to and pulls content dynamically from the template: projects-loadmore.php
The returned php and html code is inserted at the end of the #isotope-list div's content
variables are pulled from the loadmore button's data attributes.
Variables Passed:
- postOffset : how many posts have already been displayed
- totalPosts : The total number of published posts in this post type.
---**/
$('.loadMore').click(function() {
//get the offset
var postOffset = $(this).attr('data-offset');
var totalPosts = $(this).attr('data-total');
var thisObj = $(this);
//get Page Template and put on page
var ajax_url = '<?php echo admin_url('admin-ajax.php'); ?>';
$.ajax({
type: 'POST',
url: ajax_url,
data: {
action: 'get_loadmore',
pOffset: postOffset,
totalPosts: totalPosts,
},
dataType: "html",
success: function(data) {
$('#isotope-list').append(data);
$new_offset = parseInt ( thisObj.attr('data-offset') ) + 24;
thisObj.attr('data-offset', $new_offset) //set the new post offset.
if ( $('#all-posts-shown')[0] ) {
thisObj.slideUp(); //hide loadmore if all posts have been displayed.
}
},
error: function(MLHttpRequest, textStatus, errorThrown){
alert("error");
}
});
}); //end of click function
</script>
Then all that's left is to go into your projects-loadmore.php file, grab the variables, tweak your query, and display the posts:
<?php
global $post;
$the_offset = trim( sanitize_text_field( wp_unslash( $_POST['pOffset'] ) ) );
$the_total = trim( sanitize_text_field( wp_unslash( $_POST['totalPosts'] ) ) );
$args = array( 'post_type' => 'bw_projects', 'posts_per_page' => 24, 'offset' => $the_offset );
$posts_shown = $the_offset; //Increment this every time you display a project
?>
//Get your posts and insert your while loop and display code here
<?php //Then check if we've shown all the posts or not, and we're done.
if ( $posts_shown >= $the_total ) { ?>
<div id="all-posts-shown"></div>
<?php } ?>
There's a lot more you can do with this in terms of animations and tweaking, but this should be enough to get you started.
来源：https://stackoverflow.com/questions/44049195/wordpress-post-type-infinite-scroll-load-more-button