问题是你有太多的按钮。。。

我创建的插件也有同样的问题，但我只有21个按钮，而你有41个按钮。。。

解决方案是将它们分成两部分：将前20个按钮添加到第三行（mce\\U buttons\\U 3），然后将21个按钮添加到第四行（mce\\U buttons\\U 4）

您需要为每一行创建一个函数。。。

代码如下所示：

add_action(\'init\', \'add_button\');  
add_action(\'init\', \'add_button2\'); 

function add_button() {  
   if ( current_user_can(\'edit_posts\') &&  current_user_can(\'edit_pages\') )  
   {  
     add_filter(\'mce_external_plugins\', \'add_plugin\');  
     add_filter(\'mce_buttons_3\', \'register_button\');  
   }  
}

function add_button2() {  
   if ( current_user_can(\'edit_posts\') &&  current_user_can(\'edit_pages\') )  
   {  
     add_filter(\'mce_external_plugins\', \'add_plugin2\');  
     add_filter(\'mce_buttons_4\', \'register_button2\');  
   }  
}

function register_button($buttons) {  
   array_push($buttons, "quote", "one-fourth", "one-fourth-last", "one-third", "one-third-last", "one-half", "one-half-last", "two-third", "two-third-last", "three-fourth", "three-fourth-last", "custom-list-1", "custom-list-2", "custom-list-3", "custom-list-4", "message-box-info", "message-box-success", "message-box-warning", "message-box-erroneous", "message-box-simple" );  
   return $buttons;  
}

function register_button2($buttons) {  
   array_push($buttons, "message-box-custom", "recent-posts", "custom-frame-left", "custom-frame-center", "custom-frame-right", "custom-table", "accordion", "accordion-toggle", "tabs", "tabs-content", "toggle-content", "dropcap", "pull-quote", "clear", "divider", "divider-top", "custom-button", "round-button", "small-button", "button", "read-more" );  
   return $buttons;  
}

我希望这有助于。。。