如何从指令部分调用ng-click？

Question

我有一个具有局部范围的指令,其中部分包含ng-click.

小提琴就在那里:http://jsfiddle.net/stephanedeluca/QRZFs/13/

不幸的是,由于我将代码移动到指令中,因此ng-click不再触发.

控制器和指令如下:

var app = angular.module('myApp', ['ngSanitize']);

app.directive('plantStages', function ($compile) {
    return {
        restrict: 'E',
        transclude: true,
        template: '<figure class="cornStages">\
                        <p ng-transclude style="color: skyblue"></p>\
                        <hr/>\
                        <p ng-bind-html="title"></p>\
                        <p ng-bind-html="subtitle">{{subtitle}}</p>\
                        <ul>\
                            <li ng-repeat="stage in stages" ng-click="changePage(stage)">{{stage}}</li>\
                        </ul>\
                    </figure>',
        scope: {
            stages:"=",
            title:'@'
        },
        link: function (scope, element, attrs, ctrl, transclude) {
            if (!attrs.title) scope.title = "Default title";
        }
    };
});

app.controller('myCtrl', function ($scope, $location, $http) {
    $scope.stages = ['floraison', 'montaison'];
    $scope.changePage = function (page) {
        var url = "corn.page.html#/"+page;
        console.log("Change page "+page+" with url "+url);
        alert("about to change page as follows: document.location.href = "+url);
    };

});

调用它的html如下:

<div ng-controller="myCtrl">
    Stages, 
    <p ng-repeat="stage in stages">{{stage}}</p>
    <hr/>
    Plant stages
    <plant-stages 
        title="<b>Exploration<br/>du cycle</b>"
        subtitle="<em>This is a<br/>sub title</em>"
        stages="stages"
    >
        Inner<br/>directive
    </plant-stages>
</div>

任何的想法？

Answer 1

您无法changePage()直接从指令访问控制器范围中定义的内容,因为您的指令具有隔离范围.但是,仍有几种方法可以做到:

选项1:

选项1是最简单的选择.然而,这很像一个解决方法,我不建议广泛使用它.您可以从传递给链接函数的元素获取控制器的作用域并在其中调用changePage:

link: function (scope, element, attrs, ctrl, transclude) {
    if (!attrs.title) scope.title = "Default title";
    scope.changePage = element.scope().changePage; // <= Get parent scope from element, it will have changePage()
}

选项2:

如果您没有任何涉及在外部控制器中定义范围的逻辑(如您的示例中所示),则可以为您的指令定义内部控制器并在那里执行:

app.directive('plantStages', function ($compile) {
    return {
       ...
       controller: ['$scope', function($scope) {
           $scope.changePage = function(page) {
               var url = "corn.page.html#/"+page;
               console.log("Change page "+page+" with url "+url);
               alert("about to change page as follows: document.location.href = "+url);
           }
       }]
    };
});

选项3:

如果你想changePage()在不同的指令和控制器中定义重用逻辑,最好的方法是将逻辑移动到可能注入到控制器和指令的某个服务:

app.service('changePageService', function() {
    this.changePage = function(page) {
        var url = "corn.page.html#/"+page;
        console.log("Change page "+page+" with url "+url);
        alert("about to change page as follows: document.location.href = "+url);
    }
});

app.controller('myCtrl', function ($scope, $location, $http, changePageService) {
    ...
    changePageService.changePage('page');
    ...
});

app.directive('plantStages', function ($compile) {
    ...
    controller: ['$scope', 'changePageService', function($scope, changePageService) {
        $scope.changePage = changePageService.changePage;
    }]
    ...
});

选项4:

您可以传递一段代码,如changePage(page)指令的某些属性的值和指令内部的scope scope属性,'&'这将创建一个函数,该函数将在外部控制器的作用域中执行,并且参数传递给该函数.例:

JavaScript的

app.directive('plantStages', function ($compile) {
    return {
        restrict: 'E',
        transclude: true,
        template: '<figure class="cornStages">\
                        <p ng-transclude style="color: skyblue"></p>\
                        <hr/>\
                        <p ng-bind-html="title"></p>\
                        <p ng-bind-html="subtitle"></p>\
                        <ul>\
                            <li ng-repeat="stage in stages" ng-click="changePage({page: stage})">{{stage}}</li>\
                        </ul>\
                    </figure>',
        scope: {
            stages:"=",
            title:'@',
            changePage:'&'
        },
        link: function (scope, element, attrs, ctrl, transclude) {
            if (!attrs.title) scope.title = "Default title";
        }
    };
});

HTML

<div ng-controller="myCtrl">
    Stages, 
    <p ng-repeat="stage in stages">{{stage}}</p>
    <hr/>
    Plant stages
    <plant-stages 
        title="<b>Exploration<br/>du cycle</b>"
        subtitle="<em>This is a<br/>sub title</em>"
        stages="stages"
        change-page="changePage(page)"
    >
        Inner<br/>directive
    </plant-stages>

Plunker: http ://plnkr.co/edit/s4CFI3wxs0SOmZVhUkC4？p =preview