yii有两种Breadcrumbs写法，
one:
echo Breadcrumbs::widget([ 'itemTemplate' => "<li><i>{link}</i></li>\n", // template for all links 'links' => [ [ 'label' => 'Post Category', 'url' => ['post-category/view', 'id' => 10], 'template' => "<li><b>{link}</b></li>\n", // template for this link only ], ['label' => 'Sample Post', 'url' => ['post/edit', 'id' => 1]], 'Edit', ], ]); two:
echo Breadcrumbs::widget([ 'links' => isset($this->params['breadcrumbs']) ? $this->params['breadcrumbs'] : [], ]); 第二种在yii的main.php中用实例，就是最简单home->edit;
今天将要说的第一种，
echo Breadcrumbs::widget([ 'itemTemplate' => "<li><i>{link}</i></li>\n", // template for all links 'links' => $link, ]); 由于此处需要使用breadcrumbs展现相应的tree结构，经过对link中的数据进行重组可以将程序写成上面的样子，
if (!empty($title)) { $title = $title; $title_arr = explode('/', $title); foreach ($title_arr as $k => $item) { if (!empty($item)) { $link[] = ['label' => $item, 'url' => ['/tree/edit/', 'id' => $item, 'type' => 1,]]; } } $title_s = ''; foreach ($link as $k => $item) { if ($k !== 0) { if ($k === 1) { $title_s = $link[$k - 1]['label']; } else { $title_s = $title_s . '/' . $link[$k - 1]['label']; } $link[$k] = ['label' => $item['label'], 'url' => ['/tree/edit/', 'id' => $item['label'], 'type' => 1, 'title' => $title_s]]; } else { $title_s = $item['label']; } } $title = $title . '/' . $node_id['nodeId']; } else { $title = $node_id['nodeId']; } $link[] = $node_id['nodeId']; 这样就展示了一个tree的结构