Question

晚安！在递归中请帮忙，我犯了错误，我需要输出类别，如上例所示！

型号：

    protected function buildTree($data, $rootID = 0)
{
    $tree = [];
    foreach ($data as $id => $node) {
        if ($node->parent_id == $rootID) {
            unset($data[$id]);
            $node->childs = $this->buildTree($data, $node->id);
            $tree[] = $node;
        }
    }
    return $tree;
}

public function getTree()
{
    $data = Category::find()->all();
    return $this->buildTree($data);
}

查看：

 <?php $form = ActiveForm::begin() 

foreach ($tree as $cat) {
echo '<br><div class="spoiler-title">' . $cat['title'] . '</div>';
printNode($cat);
}

 function printNode($cat, $level = 1)
{
if (count($cat['childs']) > 0) {

    foreach ($cat['childs'] as $child) {

        for ($j = 1; $j < $level; $j++) {
            echo '------- <b>';
        }

        echo '' . $child['title'] . '</b><br>'; 
        //echo $form->field($model, $child['title'])->checkbox();
        //I want to do a checkbox, get an error, do not understand $ 
        //form and $ model

        if (count($child['childs']) > 0) {
            printNode($child, $level + 1);
        }
    }
 }
 }
  $form = ActiveForm::end() ?>

我是如何得到树的，这是你的代码

root
    category
    category
    category
    ---- <b>subcategory</b
    ---- <b>subcategory</b
    ---- <b>subcategory</b
    ---- <b>subcategory</b
    category
    category

我需要在子类别中创建复选框，但是我收到错误，在我在评论中写的代码中，您的代码有效，但我不能将其作为图片更改为我的需求。

Answer 1

打印树时，还应在视图中添加递归。在视图中尝试这个：

$form = \yii\bootstrap\ActiveForm::begin();

foreach ($tree as $cat) {
    printNode($cat);
}
function printNode($cat, $level = 1) {
    echo '<br><div class="spoiler-title">' . $cat['title'] . '</div>';
    if (count($cat['childs']) > 0) {
        foreach ($cat['childs'] as $child) {
            echo \yii\helpers\Html::checkbox('someName[]') . ' ' . $child['title'] . '<br>';
            if (count($child['childs']) > 0) {
                printNode($child, $level + 1);
            }
        }
    }
}
\yii\bootstrap\ActiveForm::end();

Yii2递归树菜单？

1 个答案: