如果我有这个代码：
<accordion-group heading="{{group.title}}" ng-repeat="group in groups">
{{group.content}}
</accordion-group>
使用 AngularJS、angular-ui 和 Twitter Bootstrap，是否可以让手风琴在打开时调用一些动作？我知道我不能简单地添加ng-click，因为它在“编译”到 HTML 以打开/折叠组之后已经使用。
【问题讨论】：
标签： javascript twitter-bootstrap angularjs angular-ui
Accordion 组还允许使用手风琴标题指令，而不是将其作为属性提供。您可以使用它，然后通过 ng-click 将标题包装在另一个标签中。
<accordion-group ng-repeat="group in groups" heading="{{group.title}}" is-open="group.open">
<accordion-heading>
<span ng-click="opened(group, $index)">{{group.content}}</span>
</accordion-heading>
</accordion-group>
【讨论】：
这是一个基于 pkozlowski.opensource 解决方案的解决方案。
您可以使用动态定义的属性，而不是在集合的每个项目上添加 $watch。在这里，您可以将 group 的 IsOpened 属性绑定到 is-open 属性。
<accordion-group ng-repeat="group in groups" heading="{{group.title}}" is-open="group.IsOpened">
{{group.content}}
</accordion-group>
因此，您可以在控制器中的集合的每个项目上动态添加 IsOpened 属性：
$scope.groups.forEach(function(item) {
var isOpened = false;
Object.defineProperty(item, "IsOpened", {
get: function() {
return isOpened;
},
set: function(newValue) {
isOpened = newValue;
if (isOpened) {
console.log(item); // do something...
}
}
});
});
使用 properties 而不是 watches 更适合性能。
【讨论】：
手风琴组上有is-open 属性，它指向一个可绑定的表达式。当给定的手风琴组打开时，您可以观察这个表达式并执行一些逻辑。使用这种技术，您可以将标记更改为：
<accordion-group ng-repeat="group in groups" heading="{{group.title}}" is-open="group.open">
{{group.content}}
</accordion-group>
这样您就可以在控制器中准备所需的监视表达式：
$scope.$watch('groups[0].open', function(isOpen){
if (isOpen) {
console.log('First group was opened');
}
});
虽然上述方法可行，但在实践中使用可能有点麻烦，所以如果您觉得可以改进，请在 https://github.com/angular-ui/bootstrap 中打开一个问题
【讨论】：
'groups[0].open'。我事先不知道我会有多少行......
accordion-heading 标记的is-open 选项？
这是一个受 kjv 回答启发的解决方案，它可以轻松跟踪哪个手风琴元素是打开的。我发现很难让ng-click 处理手风琴标题，尽管将元素包围在<span> 标记中并添加ng-click 效果很好。
我遇到的另一个问题是，虽然accordion 元素是通过编程方式添加到页面中的，但内容却没有。当我尝试使用链接到$scope 变量的Angular 指令（即{{path}}）加载内容时，我会被undefined 击中，因此使用了使用ID div 填充手风琴内容的波纹管方法嵌入其中。
控制器：
//initialise the open state to false
$scope.routeDescriptors[index].openState == false
function opened(index)
{
//we need to track what state the accordion is in
if ($scope.routeDescriptors[index].openState == true){ //close an accordion
$scope.routeDescriptors[index].openState == false
} else { //open an accordion
//if the user clicks on another accordion element
//then the open element will be closed, so this will handle it
if (typeof $scope.previousAccordionIndex !== 'undefined') {
$scope.routeDescriptors[$scope.previousAccordionIndex].openState = false;
}
$scope.previousAccordionIndex = index;
$scope.routeDescriptors[index].openState = true;
}
function populateDiv(id)
{
for (var x = 0; x < $scope.routeDescriptors.length; x++)
{
$("#_x" + x).html($scope.routeDescriptors[x]);
}
}
HTML：
<div ng-hide="hideDescriptions" class="ng-hide" id="accordionrouteinfo" ng-click="populateDiv()">
<accordion>
<accordion-group ng-repeat="path in routeDescriptors track by $index">
<accordion-heading>
<span ng-click="opened($index)">route {{$index}}</span>
</accordion-heading>
<!-- Notice these divs are given an ID which corresponds to it's index-->
<div id="_x{{$index}}"></div>
</accordion-group>
</accordion>
</div>
【讨论】：
我使用关联数组来创建打开状态和模型对象之间的关系。
HTML 是：
<div ng-controller="CaseController as controller">
<accordion close-others="controller.model.closeOthers">
<accordion-group ng-repeat="topic in controller.model.topics track by topic.id" is-open="controller.model.opened[topic.id]">
<accordion-heading>
<h4 class="panel-title clearfix" ng-click="controller.expand(topic)">
<span class="pull-left">{{topic.title}}</span>
<span class="pull-right">Updated: {{topic.updatedDate}}</span>
</h4>
</accordion-heading>
<div class="panel-body">
<div class="btn-group margin-top-10">
<button type="button" class="btn btn-default" ng-click="controller.createComment(topic)">Add Comment<i class="fa fa-plus"></i></button>
</div>
<div class="btn-group margin-top-10">
<button type="button" class="btn btn-default" ng-click="controller.editTopic(topic)">Edit Topic<i class="fa fa-pencil-square-o"></i></button>
</div>
<h4>Topic Description</h4>
<p><strong>{{topic.description}}</strong></p>
<ul class="list-group">
<li class="list-group-item" ng-repeat="comment in topic.comments track by comment.id">
<h5>Comment by: {{comment.author}}<span class="pull-right">Updated: <span class="commentDate">{{comment.updatedDate}}</span> | <span class="commentTime">{{comment.updatedTime}}</span></span></h5>
<p>{{comment.comment}}</p>
<div class="btn-group">
<button type="button" class="btn btn-default btn-xs" ng-click="controller.editComment(topic, comment)">Edit <i class="fa fa-pencil-square-o"></i></button>
<button type="button" class="btn btn-default btn-xs" ng-click="controller.deleteComment(comment)">Delete <i class="fa fa-trash-o"></i></button>
</div>
</li>
</ul>
</div>
</accordion-group>
</accordion>
控制器sn-p是：
self.model = {
closeOthers : false,
opened : new Array(),
topics : undefined
};
“主题”在 AJAX 调用中填充。将“打开”状态与从服务器更新的模型对象分开意味着状态会在刷新后保留。
我还用ng-controller="CaseController as controller"声明控制器
【讨论】：
手风琴控制器.js
MyApp.Controllers
.controller('AccordionCtrl', ['$scope', function ($scope) {
$scope.groups = [
{
title: "Dynamic Group Header - 1",
content: "Dynamic Group Body - 1",
open: false
},
{
title: "Dynamic Group Header - 2",
content: "Dynamic Group Body - 2",
open: false
},
{
title: "Dynamic Group Header - 3",
content: "Dynamic Group Body - 3",
open: false
}
];
/**
* Open panel method
* @param idx {Number} - Array index
*/
$scope.openPanel = function (idx) {
if (!$scope.groups[idx].open) {
console.log("Opened group with idx: " + idx);
$scope.groups[idx].open = true;
}
};
/**
* Close panel method
* @param idx {Number} - Array index
*/
$scope.closePanel = function (idx) {
if ($scope.groups[idx].open) {
console.log("Closed group with idx: " + idx);
$scope.groups[idx].open = false;
}
};
}]);
index.html
<div ng-controller="AccordionCtrl">
<accordion>
<accordion-group ng-repeat="group in groups" is-open="group.open">
<button ng-click="closePanel($index)">Close me</button>
{{group.content}}
</accordion-group>
<button ng-click="openPanel(0)">Set 1</button>
<button ng-click="openPanel(1)">Set 2</button>
<button ng-click="openPanel(2)">Set 3</button>
</accordion>
</div>
【讨论】：
您可以使用 Angular 指令来做到这一点：
<div uib-accordion-group is-open="property.display_detail" ng-repeat="property in properties">
<div uib-accordion-heading ng-click="property.display_detail = ! property.display_detail">
some heading text
</div>
<!-- here is the accordion body -->
<div ng-init="i=$index"> <!-- I keep track of the index of ng-repeat -->
<!-- and I call a custom directive -->
<mydirective mydirective_model="properties" mydirective_index="{% verbatim ng %}{{ i }}{% endverbatim ng %}">
here is the body
</mydirective>
</div>
</div>
app.directive("mydirective", function() {
return {
restrict: "EAC",
link: function(scope, element, attrs) {
/* note that ng converts everything to camelCase */
var model = attrs["mydirectiveModel"];
var index = attrs["mydirectiveIndex"];
var watched_name = model + "[" + index + "].display_detail"
scope.$watch(watched_name, function(is_displayed) {
if (is_displayed) {
alert("you opened something");
}
else {
alert("you closed something");
}
});
}
}
});
我的设置有一些特殊之处（我使用 Django，因此使用了“{% verbatim %}”标签），但该方法应该可以工作。
【讨论】：