bp_core_register_nav_screen_function (数组|字符串$ args.=＇＇的）

函数bp_core_register_nav_screen_function($args = ") {$bp = buddypress();$defaults = array('name' => false， //显示nav项的名称。'slug' => false， // nav项目的URL slug。'item_css_id' => false， //应用到导航项的HTML的CSS ID。'show_for_displayed_user' => true， //当查看另一个用户时，这个导航项显示吗?'site_admin_only' => false， //只有站点管理员才能看到这个导航项吗?'position' => 99， //该导航项应该定位的索引。'screen_function' => false， //单击时要运行的函数的名称。'default_subnav_slug' => false //默认subnav项目点击时选择的slug。)；$r = wp_parse_args($args， $defaults); // If we don't have the required info we need, don't register this screen function. if ( empty( $r['slug'] ) ) { return false; } /** * If this is for site admins only and the user is not one, * don't register this screen function. */ if ( ! empty( $r['site_admin_only'] ) && ! bp_current_user_can( 'bp_moderate' ) ) { return false; } /** * If this nav item is hidden for the displayed user, and * the logged in user is not the displayed user * looking at their own profile, don't don't register this screen function. */ if ( empty( $r['show_for_displayed_user'] ) && ! bp_user_has_access() ) { return false; } /** * If the nav item is visible, we are not viewing a user, and this is a root * component, don't attach the default subnav function so we can display a * directory or something else. */ if ( ( -1 != $r['position'] ) && bp_is_root_component( $r['slug'] ) && ! bp_displayed_user_id() ) { return; } // Look for current component. if ( bp_is_current_component( $r['slug'] ) || bp_is_current_item( $r['slug'] ) ) { // The requested URL has explicitly included the default subnav // (eg: http://example.com/members/membername/activity/just-me/) // The canonical version will not contain this subnav slug. if ( ! empty( $r['default_subnav_slug'] ) && bp_is_current_action( $r['default_subnav_slug'] ) && ! bp_action_variable( 0 ) ) { unset( $bp->canonical_stack['action'] ); } elseif ( ! bp_current_action() ) { // Add our screen hook if screen function is callable. if ( is_callable( $r['screen_function'] ) ) { add_action( 'bp_screens', $r['screen_function'], 3 ); } if ( ! empty( $r['default_subnav_slug'] ) ) { /** * Filters the default component subnav item. * * @since BuddyPress 1.5.0 * * @param string $value The slug of the default subnav item * to select when clicked. * @param array $r Parsed arguments for the nav item. */ $bp->current_action = apply_filters( 'bp_default_component_subnav', $r['default_subnav_slug'], $r ); } } } /** * Fires after the screen function for an item in the BuddyPress main * navigation is registered. * * @since BuddyPress 2.4.0 * * @param array $r Parsed arguments for the nav item. * @param array $args Originally passed in arguments for the nav item. * @param array $defaults Default arguments for a nav item. */ do_action( 'bp_core_register_nav_screen_function', $r, $args, $defaults ); }