可折叠面板,带有自举和敲击

时间:2015-06-17 14:02:28

标签: javascript twitter-bootstrap knockout.js

我无法使用KnockoutJS和Bootstrap制作手风琴以正常工作。我这样定义了它:

<div class="panel-group" id="accordion" data-bind="foreach: Advertisers()">
    <div class="panel panel-default">
        <div class="panel-heading">
            <h4 class="panel-title">
                <span data-toggle="collapse" data-bind="html: $data, attr: { 'data-target': '#' + $data }"></span>
            </h4>
        </div>
    </div>
    <div class="panel-collapse collapse" data-parent="#accordion" data-bind="attr: { id: $data }">
        <div class="panel-body">
             ...content...

&#34;广告商&#34;是一个可观察的字符串数组,因此$ data是一个字符串。我得到一个&#34; row&#34;对于每个广告客户。

所有行最初都会折叠,单击一行会展开下面的内容。到目前为止一切都很好。

问题在于,当我点击另一行时,我希望之前的扩展会崩溃,但这种情况并没有发生。 (我无法使用Bootstrap和KnockoutJS制作小提琴......)

编辑了代码。

2 个答案:

答案 0 :(得分:4)

一个简单的自定义绑定怎么样,它还允许你稍微整理你的视图:

ko.bindingHandlers.bootstrapAccordion = {
  init: function(elem, value, allBindings) {
    var options = ko.utils.unwrapObservable(value()),
        handleClass = '[data-toggle]',
        contentClass = '.collapse',
        openItem = ko.utils.unwrapObservable(options.openItem) || false,
        itemClass = '.' + ko.utils.unwrapObservable(options.item) || '.accordion-group',
        items = $(elem).find(contentClass);

    // toggle: false required to hide items on load
    items.collapse({ parent: elem, toggle: false });
    if (openItem > -1) items.eq(openItem).collapse('show');

    // if the array is dynamic, the collapse should be re-initiated to work properly
    var list = allBindings.get('foreach');
    if (ko.isObservable(list)) {
      list.subscribe(function() { 
        $(elem).find(contentClass).collapse({ parent: elem, toggle: false });              
      });
    }

    $(elem).on('click', handleClass, function() {
        $(elem).find(contentClass).collapse('hide');
        $(this).closest(itemClass).find(contentClass).collapse('show');
    });
  }
};

此绑定需要2个参数(容器的className,以及可选的,在加载时打开的项目),例如:bootstrapAccordion: {item: 'panel-group', openItem: 0},并且应该在具有foreach绑定的同一元素上设置。它假定可折叠部分具有collapse类,并且用于切换它们的句柄具有data-toggle属性。

在此处查看此操作: http://jsfiddle.net/pkvn79h8/22/

答案 1 :(得分:0)

我扩展了Tyblitz上面的示例,包括支持更改图标(例如,+ / - ,向上/向下箭头),并支持通过将data-open-next属性应用于任何应该应用的内容来移动到下一个面板点击后转到下一个面板。

ko.bindingHandlers.bootstrapAccordion = {
    init: function (elem, value, allBindings) {
        var options = ko.utils.unwrapObservable(value()),
            handleClass = '[data-toggle]',
            contentClass = '.collapse',
            openedClass = ko.utils.unwrapObservable(options.openedClass) || 'fa-minus',
            closedClass = ko.utils.unwrapObservable(options.closedClass) || 'fa-plus',
            openCloseToggleClasses = openedClass + ' ' + closedClass,
            openItem = ko.utils.unwrapObservable(options.openItem) || false,
            itemClass = '.' + (ko.utils.unwrapObservable(options.item) || 'accordion-group'),
            items = $(elem).find(contentClass);

        var initializeItems = function(items) {
            // toggle: false required to hide items on load
            items.collapse({ parent: elem, toggle: false });
            if (openItem > -1) {
                items.eq(openItem).collapse('show');
                items.eq(openItem).closest(itemClass).find('.panel-heading').find('i').toggleClass(openCloseToggleClasses);
                items.eq(openItem).closest(itemClass).find('.panel-heading').addClass('active');
            }
        }

        initializeItems(items);

        // if the array is dynamic, the collapse should be re-initiated to work properly
        var list = allBindings.get('foreach');
        if (ko.isObservable(list)) {
            list.subscribe(function () {
                initializeItems($(elem).find(contentClass));
            });
        }

        $(elem).on('click', handleClass, function () {
            $(elem).find(contentClass).collapse('hide');
            $(this).closest(itemClass).find(contentClass).collapse('show');
            $(this).closest(itemClass).parent().find('.panel-heading i').removeClass(openCloseToggleClasses);
            $(this).closest(itemClass).parent().find('.panel-heading i').addClass(closedClass);
            $(this).closest(itemClass).parent().find('.panel-heading').removeClass('active');
            if ($(this).closest(itemClass).find('.panel-collapse').attr('aria-expanded') === "true") {
                $(this).closest(itemClass).find('.panel-heading i').toggleClass(openCloseToggleClasses);
                $(this).closest(itemClass).find('.panel-heading').addClass('active');
            }
        });

        $(elem).on('click', '[data-open-next]', function () {
            $next = $(this).closest(itemClass).next(itemClass).find(handleClass);
            if ($next.length) {
                $next.click();
            } else {
                $same = $(this).closest(itemClass).find(contentClass);
                $same.collapse('hide');
                $same.parent().find('.panel-heading i').removeClass(openCloseToggleClasses);
                $same.parent().find('.panel-heading i').addClass(closedClass);
                $same.parent().find('.panel-heading').removeClass('active');
            }
        });
    }
};

用于此绑定的示例标记:

<div data-bind="foreach: listOfThings, bootstrapAccordion: { openItem: 0 }">
    <div class="accordion-group">
        <div class="panel panel-default" style="cursor: pointer;" data-toggle>
            <div class="panel-heading">
                <i class="fa fa-plus fa-pull-left fa-2x"></i>
                <h3 data-bind="text: name">Title of expander</h3>
            </div>
        </div>
        <div class="panel-collapse collapse">
            <div class="panel-body">
                <div class="clearfix" data-accordion-content>
                <!-- content goes here -->

                <!-- ko if: $index() < $parent.listOfThings().length -1 -->
                <button data-open-next>Next Thing</button>
                <!-- /ko -->
                </div>
            </div>
        </div>
    </div>
</div>

我会感到很难不回馈:)