Class yii\widgets\Breadcrumbs

继承yii\widgets\Breadcrumbs » yii\base\Widget » yii\base\Component » yii\base\BaseObject
实现yii\base\Configurable, yii\base\ViewContextInterface
可用自版本2.0
源代码 https://github.com/yiisoft/yii2/blob/master/framework/widgets/Breadcrumbs.php

Breadcrumbs displays a list of links indicating the position of the current page in the whole site hierarchy.

For example, breadcrumbs like "Home / Sample Post / Edit" means the user is viewing an edit page for the "Sample Post". He can click on "Sample Post" to view that page, or he can click on "Home" to return to the homepage.

To use Breadcrumbs, you need to configure its $links property, which specifies the links to be displayed. For example,

// $this is the view object currently being used
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',
    ],
]);

Because breadcrumbs usually appears in nearly every page of a website, you may consider placing it in a layout view. You can use a view parameter (e.g. $this->params['breadcrumbs']) to configure the links in different views. In the layout view, you assign this view parameter to the $links property like the following:

// $this is the view object currently being used
echo Breadcrumbs::widget([
    'links' => isset($this->params['breadcrumbs']) ? $this->params['breadcrumbs'] : [],
]);

公共属性

隐藏继承的属性

属性类型描述定义在
$activeItemTemplate string The template used to render each active item in the breadcrumbs. yii\widgets\Breadcrumbs
$autoIdPrefix string The prefix to the automatically generated widget IDs. yii\base\Widget
$behaviors yii\base\Behavior[] 附加到此组件的行为列表. yii\base\Component
$counter integer A counter used to generate $id for widgets. yii\base\Widget
$encodeLabels boolean Whether to HTML-encode the link labels. yii\widgets\Breadcrumbs
$id string ID of the widget. yii\base\Widget
$itemTemplate string The template used to render each inactive item in the breadcrumbs. yii\widgets\Breadcrumbs
$options array The HTML attributes for the breadcrumb container tag. yii\widgets\Breadcrumbs
$stack yii\base\Widget[] The widgets that are currently being rendered (not ended). yii\base\Widget
$tag string The name of the breadcrumb container tag. yii\widgets\Breadcrumbs
$view yii\web\View The view object that can be used to render views or view files. yii\base\Widget
$viewPath string The directory containing the view files for this widget. yii\base\Widget

公共方法

隐藏继承的方法

方法描述定义在
__call() 调用不是类方法的指定的方法. yii\base\Component
__clone() 在通过克隆现有对象创建对象之后调用此方法. yii\base\Component
__construct() 构造函数. yii\base\BaseObject
__get() 返回组件属性的值. yii\base\Component
__isset() 检查属性是否已设置, 即已定义且不为null. yii\base\Component
__set() 设置组件属性的值. yii\base\Component
__unset() 将组件属性设置为null. yii\base\Component
afterRun() This method is invoked right after a widget is executed. yii\base\Widget
attachBehavior() 将行为附加到此组件. yii\base\Component
attachBehaviors() 将行为列表附加到组件. yii\base\Component
beforeRun() This method is invoked right before the widget is executed. yii\base\Widget
begin() Begins a widget. yii\base\Widget
behaviors() 返回此组件应该具有的行为列表. yii\base\Component
canGetProperty() 返回一个值, 指示属性是否可读取. yii\base\Component
canSetProperty() 返回一个值, 指示属性是否可设置. yii\base\Component
className() 返回此类的完全限定名称. yii\base\BaseObject
detachBehavior() 从组件中分离一个行为. yii\base\Component
detachBehaviors() 分离组件中的所有行为. yii\base\Component
end() Ends a widget. yii\base\Widget
ensureBehaviors() 确保在 behaviors() 中声明的行为已附加到此组件. yii\base\Component
getBehavior() 返回指定的行为对象. yii\base\Component
getBehaviors() 返回附加到此组件的所有行为. yii\base\Component
getId() Returns the ID of the widget. yii\base\Widget
getView() Returns the view object that can be used to render views or view files. yii\base\Widget
getViewPath() Returns the directory containing the view files for this widget. yii\base\Widget
hasEventHandlers() 返回一个值, 指示是否有任何处理程序附加到指定的事件. yii\base\Component
hasMethod() 返回一个值, 指示方法是否已定义. yii\base\Component
hasProperty() 返回一个值, 指示属性是否已定义. yii\base\Component
init() Initializes the object. yii\base\Widget
off() 从该组件分离现有的事件处理程序. yii\base\Component
on() 将事件处理程序附加到事件. yii\base\Component
render() Renders a view. yii\base\Widget
renderFile() Renders a view file. yii\base\Widget
run() Renders the widget. yii\widgets\Breadcrumbs
setId() Sets the ID of the widget. yii\base\Widget
setView() Sets the view object to be used by this widget. yii\base\Widget
trigger() 触发事件. yii\base\Component
widget() Creates a widget instance and runs it. yii\base\Widget

受保护的方法

隐藏继承的方法

方法描述定义在
renderItem() Renders a single breadcrumb item. yii\widgets\Breadcrumbs

事件

隐藏继承的事件

事件类型描述定义在
EVENT_AFTER_RUN yii\base\WidgetEvent An event raised right after executing a widget. (available since version 2.0.11) yii\base\Widget
EVENT_BEFORE_RUN yii\base\WidgetEvent An event raised right before executing a widget. (available since version 2.0.11) yii\base\Widget
EVENT_INIT yii\base\Event An event that is triggered when the widget is initialized via init(). (available since version 2.0.11) yii\base\Widget

属性详情

$activeItemTemplate public 属性

The template used to render each active item in the breadcrumbs. The token {link} will be replaced with the actual HTML link for each active item.

public string $activeItemTemplate "<li class=\"active\">{link}</li>\n"
$encodeLabels public 属性

Whether to HTML-encode the link labels.

public boolean $encodeLabels true

The first hyperlink in the breadcrumbs (called home link). Please refer to $links on the format of the link. If this property is not set, it will default to a link pointing to yii\web\Application::$homeUrl with the label 'Home'. If this property is false, the home link will not be rendered.

public array $homeLink null
$itemTemplate public 属性

The template used to render each inactive item in the breadcrumbs. The token {link} will be replaced with the actual HTML link for each inactive item.

public string $itemTemplate "<li>{link}</li>\n"

List of links to appear in the breadcrumbs. If this property is empty, the widget will not render anything. Each array element represents a single link in the breadcrumbs with the following structure:

[
    'label' => 'label of the link',  // required
    'url' => 'url of the link',      // optional, will be processed by Url::to()
    'template' => 'own template of the item', // optional, if not set $this->itemTemplate will be used
]

If a link is active, you only need to specify its "label", and instead of writing ['label' => $label], you may simply use $label.

Since version 2.0.1, any additional array elements for each link will be treated as the HTML attributes for the hyperlink tag. For example, the following link specification will generate a hyperlink with CSS class external:

[
    'label' => 'demo',
    'url' => 'http://example.com',
    'class' => 'external',
]

Since version 2.0.3 each individual link can override global $encodeLabels param like the following:

[
    'label' => '<strong>Hello!</strong>',
    'encode' => false,
]
public array $links = []
$options public 属性

The HTML attributes for the breadcrumb container tag.

参见 yii\helpers\Html::renderTagAttributes() for details on how attributes are being rendered.

public array $options = ['class' => 'breadcrumb']
$tag public 属性

The name of the breadcrumb container tag.

public string $tag 'ul'

方法详情

renderItem() protected 方法

Renders a single breadcrumb item.

protected string renderItem ( $link, $template )
$link array

The link to be rendered. It must contain the "label" element. The "url" element is optional.

$template string

The template to be used to rendered the link. The token "{link}" will be replaced by the link.

return string

The rendering result

throws yii\base\InvalidConfigException

if $link does not have "label" element.

run() public 方法

Renders the widget.

public void run ( )