我刚刚在这里阅读有关通过require选项从另一个指令中访问一个指令的控制器的信息:
http://jasonmore.net/angular-js-directives-difference-controller-link/
我的视图中的指令droppable和dashboard声明 - 在两个不同的div上:
<div class="wrapper wrapper-content animated fadeInRight">
<div class="row">
<div class="col-lg-12" data-droppable drop="handleDrop">
<div id="dash" dashboard="dashboardOptions" class="dashboard-container"></div>
</div>
</div>
然而,我似乎无法让它发挥作用。我下面的dashboardCtrl参数是NULL。
在我的droppable指令中,我使用了REQUIRE选项:
.directive('droppable', function () {
return {
scope: {
drop: '&',
},
//****************** dashboard directive is optionally requested ************
require: '?dashboard',
link: function (scope, element, attributes, dashboardCtrl) {
el.addEventListener('drop', function (e) {
if (e.preventDefault) { e.preventDefault(); }
this.classList.remove('over');
var item = document.getElementById(e.dataTransfer.getData('Text'));
this.appendChild(item.cloneNode(true));
// *** CALL INTO THE dashboardCtrl controller ***
dashboardCtrl.addWidgetInternal();
return false;
}, false);
}
}
});
和仪表板指令:
angular.module('ui.dashboard')
.directive('dashboard', ['WidgetModel', 'WidgetDefCollection', '$modal', 'DashboardState', '$log', function (WidgetModel, WidgetDefCollection, $modal, DashboardState, $log) {
return {
restrict: 'A',
templateUrl: function (element, attr) {
return attr.templateUrl ? attr.templateUrl : 'app/shared/template/dashboard.html';
},
scope: true,
controller: ['$scope', '$attrs', function (scope, attrs) {
// ommitted for brevity
}],
link: function (scope) {
scope.addWidgetInternal = function (event, widgetDef) {
event.preventDefault();
scope.addWidget(widgetDef);
};
};
}
}]);
但是,我的dashboardCtrl
参数为NULL。请帮我弄清楚如何使用require。
我实际上需要调用addWidget()函数,该函数位于link选项中;但我想我可以将其复制或移动到控制器选项中。
谢谢你! 鲍勃答案 0 :(得分:1)
以下是需要dashboard
的“父母”指令droppable
的示例,以及使用require
并传递dashboardCtrl
Here 是查看指令传播指令的好文章
小提琴示例也是根据您之前的问题构建的
app.directive('droppable', [function () {
return {
restrict: 'A',
require: 'dashboard',
link: function (scope, elem, attrs, dashboardCtrl) {
dashboardCtrl.controllerSpecificFunction('hello from child directive!');
scope.addWidgetInternal = function(message) {
console.log(message);
}
}
}
}]);
app.directive('dashboard', [function () {
return {
restrict: 'A',
controller: function ($scope) {
$scope.handleDrop = function(message) {
$scope.addWidgetInternal(message)
}
this.controllerSpecificFunction = function(message) {
console.log(message);
}
}
}
}]);
根据讨论,这里是我目前理解的问题的解决方案
父指令dashboard
可选地需要子指令droppable
,并且需要在两者之间进行通信
<div dashboard>
<button id="dash" droppable ng-click="handleDrop($event)">Handle Drop</button>
</div>
app.directive('droppable', [function () {
return {
restrict: 'A',
require: '^?dashboard',
link: function (scope, elem, attrs, dashboardCtrl) {
scope.handleDrop = function($event) {
dashboardCtrl.addWidgetInternal($event);
}
}
}
}]);
app.directive('dashboard', [function () {
return {
restrict: 'A',
controller: function ($scope) {
this.addWidgetInternal = function($event) {
console.log($event);
}
}
}
}]);