如何从指令部分调用ng-click?

时间:2014-05-03 11:02:46

标签: angularjs angularjs-directive angularjs-ng-click

我有一个具有局部范围的指令,其中部分包含ng-click。

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

不幸的是,由于我将代码移到指令中,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>

有什么想法吗?

2 个答案:

答案 0 :(得分:6)

您无法直接从指令访问控制器范围中定义的changePage(),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功能的元素获取控制器的范围,并在那里调用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(如您的示例所示),您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:

如果你想在不同的指令和控制器中重用changePage()中定义的逻辑,最好的方法是将逻辑移动到可能注入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:

您可以将changePage(page)之类的代码作为指令的某些属性的值传递,并将指令定义范围属性传递给'&',这将创建一个将在外部控制器范围内执行的函数传递给该函数的参数。例如:

<强>的JavaScript

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";
        }
    };
});

<强> 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

答案 1 :(得分:1)

指令的想法是将它们视为可重用的组件,并尽可能避免外部依赖。如果您可以在自己的控制器中定义指令的行为,那么就这样做。

module.directive('myDirective', function () {
  return {
    restrict: 'E',
    controller: function() { /* behaviour here */ },
    template: '<div>Directive Template</div>',
        scope: {
            /* directive scope */
        }
    };
});

如果无法做到这一点,您可以按照链接问题中的说明传递该功能(请参阅上面的评论)。查看updated fiddle