您需要粘贴您的代码，以便我们查看问题所在，但是，我可以在Wordpress v3中演示如何实现这一点。5.

请遵守中的注释my_insert_custom_image_sizes:

function my_insert_custom_image_sizes( $sizes ) {
    // get the custom image sizes
    global $_wp_additional_image_sizes;
    // if there are none, just return the built-in sizes
    if ( empty( $_wp_additional_image_sizes ) )
        return $sizes;

    // add all the custom sizes to the built-in sizes
    foreach ( $_wp_additional_image_sizes as $id => $data ) {
        // take the size ID (e.g., \'my-name\'), replace hyphens with spaces,
        // and capitalise the first letter of each word
        if ( !isset($sizes[$id]) )
            $sizes[$id] = ucfirst( str_replace( \'-\', \' \', $id ) );
    }

    return $sizes;
}


function custom_image_setup () {
    add_theme_support( \'post-thumbnails\' );
    add_image_size( \'custom-image-size-1\', 160, 9999 ); //  small columned
    add_image_size( \'custom-image-size-2\', 300, 9999 ); //  medium
    add_image_size( \'custom-image-size-3\', 578, 190, true ); //  cropped
    add_filter( \'image_size_names_choose\', \'my_insert_custom_image_sizes\' );
}

add_action( \'after_setup_theme\', \'custom_image_setup\' );

假设您在中添加了自定义图像大小after_setup_theme 它的id如下所示。。。

... add_image_size( \'other-thumb\', 240, 200, true ); 

// Add other image size options to insert image dialog
add_filter(\'image_size_names_choose\', \'xf_more_sizes\', 4, 1);
function xf_more_sizes($sizes){
   $sizes[\'other-thumb\'] = __(\'Othernail\');
   return $sizes;
}

这对我很有帮助：

function setup_image_sizes() {

    if ( function_exists( \'add_image_size\' ) ) {

        add_image_size( \'image-retina\', 576, 320, true );
    }

    function pc_image_sizes($sizes){

        $sizes[\'image-retina\'] = __(\'Image\');
        return $sizes;
    }

    add_filter(\'image_size_names_choose\', \'pc_image_sizes\');
}

add_action( \'after_setup_theme\', \'setup_image_sizes\' );