我在AngularJS中有一个指令:
module = angular.module("demoApp", [], null);
module.directive('sample', function () {
return {
restrict: "E",
transclude: true,
replace: true,
template: "<div ng-transclude></div>",
controller: function ($scope, $element) {
this.act = function (something) {
//problematic line HERE
$element.trigger("myEvent.sample", [something]);
};
}
};
})
.directive('item', function () {
return {
restrict: "E",
require: "^sample",
transclude: true,
replace: true,
template: "<a ng-transclude style='display: inline-block; border: 1px solid crimson; margin: 2px; padding: 5px; color: crimson; text-decoration: none; background: #f5d0d0; cursor: pointer;'></a>",
link: function (scope, element, attributes, parentController) {
element.on("click", function () {
parentController.act(this.innerText);
});
}
}
});
在我的HTML中,我使用它:
<sample id="myElement">
<item>1</item>
<item>2</item>
</sample>
将呈现为:
<div ng-transclude="" id="myElement">
<a ng-transclude="" style="display: inline-block; border: 1px solid crimson; margin: 2px; padding: 5px; color: crimson; text-decoration: none; background: #f5d0d0; cursor: pointer;;display: inline-block; border: 1px solid crimson; margin: 2px; padding: 5px; color: crimson; text-decoration: none; background: #f5d0d0; cursor: pointer;" class="ng-scope"><span class="ng-scope">1</span></a>
<a ng-transclude="" style="display: inline-block; border: 1px solid crimson; margin: 2px; padding: 5px; color: crimson; text-decoration: none; background: #f5d0d0; cursor: pointer;;display: inline-block; border: 1px solid crimson; margin: 2px; padding: 5px; color: crimson; text-decoration: none; background: #f5d0d0; cursor: pointer;" class="ng-scope"><span class="ng-scope">2</span></a>
</div>
我希望能够通过jQuery手动触发事件:
$("#myElement").on("myEvent.sample", function (e, something) {
alert("click: " + something);
});
我想在点击链接时触发此事件。
如果我在replace
指令上将false
属性设置为sample
,则可行。我想这是因为在触发事件时,元素sample
不再存在,因此它将被内部模板替换。
那么,我该如何做到这一点?
按照以下答案的建议,这样做不会达到我的目的:
$($element).trigger("myEvent.sample", [something]);
答案 0 :(得分:16)
答案 1 :(得分:4)
这里更新了小提琴:http://jsfiddle.net/3u3zh/1/
有几点值得注意:
由于角度转换DOM的方式,我建议在主体上附加所有自定义侦听器,然后按事件目标过滤它们。 $('body').on('myEvent.sample', 'target-selector-expr', handler)
正是这样做的。例如,如果在ngRepeat
ed元素上使用自定义事件侦听器,则不会执行处理程序,因为在尝试将事件附加到它们时这些元素不存在。
在触发事件时,似乎有点缺乏角度的jqLite实现功能。因此,我在jQuery(sample
)中包含了$($element)
个元素,因为否则附加数据将无法到达处理程序。
最终模板:
<div ng-app="myApp">
<sample id="myElement"><item>1</item><item>2</item></sample>
</div>
JS:
var myApp=angular.module('myApp',[]);
myApp.directive('sample', function () {
return {
restrict: "E",
replace: true,
transclude: true,
template: "<div ng-transclude></div>",
controller: function ($scope, $element) {
this.act = function (something) {
$($element).trigger("myEvent.sample", [something]);
};
}
};
})
.directive('item', function () {
return {
restrict: "E",
require: "^sample",
transclude: true,
template: "<a ng-transclude></a>",
link: function (scope, element, attributes, parentController) {
element.on("click", function(e) {
parentController.act(this.innerHTML);
});
}
}
})
$(document).ready(function(){
$("body").on("myEvent.sample", '#myElement', function (e, something) {
alert('clicked: ' + something);
});
});