这是我当前检索幻灯片的方式：

<?php
    $args = array(
        \'ignore_sticky_posts\' => 1,
        \'posts_per_page\' => 20,
        \'post_type\' => \'slide\'
    );
    $slides = new WP_Query( $args );    
    ?>

    <?php if($slides->post_count > 0) :?>
    <div class="slideshow">         
            <ul class="slides">
                <?php $i = 1; while ($slides->have_posts()) : $slides->the_post(); ?>
                <?php
                //Get slide options         
                $slide_background_img = wp_get_attachment_image_src(get_post_meta($post->ID, "_ttrust_slide_background_image", true), \'full\');          
                $slide_background_img = $slide_background_img[0];

                $s_styles = "";
                $s_class = "";
                if($slide_background_img){
                    $s_styles .= "background-image: url(".$slide_background_img.");";                           
                }       
                ?>                  

                <li id="slide<?php echo $i; ?>" <?php post_class($s_class); ?> style="<?php echo $s_styles;?>"> 

和在函数中。php我设置了拇指大小：

add_theme_support(\'post-thumbnails\');  
add_image_size( \'vip-thumb\', 1024, 9999 ); //300 pixels wide (and unlimited height)

如果在早期代码中，我更改：

$slide_background_img = wp_get_attachment_image_src(get_post_meta($post->ID, "_ttrust_slide_background_image", true), \'full\');

至

$slide_background_img = wp_get_attachment_image_src(get_post_meta($post->ID, "_ttrust_slide_background_image", true), \'vip-thumb\');

或

$slide_background_img = wp_get_attachment_image_src(get_post_meta($post->ID, "_ttrust_slide_background_image", true), \'vip-thumb\', true);

我没有调整大小的拇指，只有原始图像

知道我做错了什么吗？