Question

我正试图在我的标题中添加下拉列表。下拉标签即将到来。但是，dropdwon值不会到来。可能是什么问题？

<?php

/* @var $this \yii\web\View */
/* @var $content string */

use yii\helpers\Html;
use yii\bootstrap\Nav;
use yii\bootstrap\NavBar;
use yii\bootstrap\Dropdown;
use yii\widgets\Breadcrumbs;
use app\assets\AppAsset;

AppAsset::register($this);
?>

<div class="wrap">
<?php
    NavBar::begin([
    'brandLabel' => 'My Company',
    'brandUrl' => Yii::$app->homeUrl,
    'options' => [
        'class' => 'navbar-inverse navbar-fixed-top',
    ],
    ]);?>

<?
    echo Nav::widget([
    'options' => ['class' => 'navbar-nav navbar-right'],
    'items' => [
        ['label' => 'Danish Enam', 'url' => ['/site/register']],
        ['label' => 'Dropdown', 'url' => ['#'],
         ['label' => 'DropdownA', 'url' => '/'],
             ['label' => 'DropdownB', 'url' => '#'],
        ],
    ],
    ]);
NavBar::end();
?>

这是截图。你们都可以清楚地看到。下拉进入标题。 “我的公司”文本的权利。但是，没有任何价值观。不可点击。

任何想法？

Answer 1

您应该只使用其他Nav窗口小部件而不是Dropdown：

NavBar::begin([
    'brandLabel' => 'My Company',
    'brandUrl' => Yii::$app->homeUrl,
    'options' => [
        'class' => 'navbar-inverse navbar-fixed-top',
    ],
]);

echo Nav::widget([
    'options' => [
        'class' => 'navbar-nav navbar-left',
    ],
    'items' => [
        [
            'label' => 'Dropdown',
            'url' => '#',
            'items' => [
                ['label' => 'DropdownA', 'url' => '/'],
                ['label' => 'DropdownB', 'url' => '#'],
            ],
        ],
    ],
]);

Answer 2

请尝试以下代码：

echo '<ul id="navbar-id" class="navbar-nav navbar-right nav">';
echo '<li class="dropdown">';
echo '<a href="#" data-toggle="dropdown" class="dropdown-toggle">Label <b class="caret"></b></a>';

echo Dropdown::widget([
    'items' => [
        ['label' => 'DropdownA', 'url' => '/'],
        ['label' => 'DropdownB', 'url' => '#'],
    ],
]);

echo '</li>';
echo '</ul>';

Answer 3

<?php

/* @var $this \yii\web\View */
/* @var $content string */

use yii\helpers\Html;
use yii\bootstrap\Nav;
use yii\bootstrap\NavBar;
use yii\widgets\Breadcrumbs;
use app\assets\AppAsset;

AppAsset::register($this);
?>
<?php $this->beginPage() ?>
<!DOCTYPE html>
<html lang="<?= Yii::$app->language ?>">
<head>
    <meta charset="<?= Yii::$app->charset ?>">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <?= Html::csrfMetaTags() ?>
    <title><?= Html::encode($this->title) ?></title>
    <?php $this->head() ?>
</head>
<body>
<?php $this->beginBody() ?>

<div class="wrap">
    <?php
    NavBar::begin([
        'brandLabel' => 'My Company',
        'brandUrl' => Yii::$app->homeUrl,
        'options' => [
            'class' => 'navbar-inverse navbar-fixed-top',
        ],
    ]);


    echo Nav::widget([
        'items' => [
            [
                'label' => 'Home',
                'url' => ['site/index'],
                'linkOptions' => ['data-method' => 'post'],
            ],
            [
                'label' => 'Dropdown',
                'items' => [
                     ['label' => 'Level 1 - Dropdown A', 'url' => '#'],
                     '<li class="divider"></li>',

                     ['label' => 'Level 1 - Dropdown B', 'url' => '#'],
                ],
            ],
            [
                'label' => 'Login',
                'url' => ['site/login'],
                'visible' => Yii::$app->user->isGuest
            ],
        ],
        'options' => ['class' =>'nav-pills'], // set this to nav-tab to get tab-styled navigation
    ]);


    NavBar::end();
    ?>

    <div class="container">
        <?= Breadcrumbs::widget([
            'links' => isset($this->params['breadcrumbs']) ? $this->params['breadcrumbs'] : [],
        ]) ?>
        <?= $content ?>
    </div>
</div>

<footer class="footer">
    <div class="container">
        <p class="pull-left">&copy; My Company <?= date('Y') ?></p>

        <p class="pull-right"><?= Yii::powered() ?></p>
    </div>
</footer>

<?php $this->endBody() ?>
</body>
</html>
<?php $this->endPage() ?>

这是一个完整的布局代码。尝试这种布局的任何视图肯定会起作用。首先命名这个文件header.php（任何名称都没问题）然后选择你希望这个布局带有下拉列表的视图文件。

Answer 4

代码中的小错误：

NavBar::begin([
'brandLabel' => 'My Company',
'brandUrl' => Yii::$app->homeUrl,
'options' => [
    'class' => 'navbar-inverse navbar-fixed-top',
],
]);


echo Nav::widget([
'options' => ['class' => 'navbar-nav navbar-right'],
'items' => [
    ['label' => 'Danish Enam', 'url' => ['/site/register']],
    ['label' => 'Dropdown',
        'items' => [
            ['label' => 'DropdownA', 'url' => '/'],
            ['label' => 'DropdownB', 'url' => '#'],
        ],
    ],
],
]);

NavBar::end();

然后是坏的新的，有一个限制与bootstrap，你只能有2个级别的下拉列表而不是3。

如果您想了解更多信息，请查看：

Multilevel Boostrap Menu in Yii 2

yii2中的下拉列表不起作用

4 个答案: