我对Angular指令感到羞愧,并且对隔离范围有困难。我正在制作一个非常基本的指令/控制器,只是通过将范围属性设置为'&'来尝试从指令内的ng-click发出警报。字首。我现在已经盯着它看了45分钟但是看不出我做错了什么,但是点击按钮时没有发生任何事情(其他2个前缀正在工作)。这是指令/控制器的代码:
(function() {
'use strict';
angular
.module('mePracticing')
.directive('practiceDirective', practiceDirective);
function practiceDirective() {
var directive = {
restrict: 'AE',
scope: {
movie: '=',
rating: '@',
display: '&'
},
template: '<div>Movie: {{movie}}</div>' +
"Enter a movie: <input type ='text' ng-model='movie'>" +
"<div>Rating: {{rating}}</div>" +
"<div><button ng-click='displayMovie(movie)'>CLICK ME</button></div>"
};
return directive;
}
})();
(function() {
'use strict';
angular
.module('mePracticing')
.controller('practiceController', practiceController);
function practiceController($scope) {
$scope.movie = 'The Big Lebowski';
$scope.rating = 1000101010;
$scope.displayMovie = function(movie) {
alert("Movie :" + movie);
}
}
})();
这是HTML:
<html>
<head>
<title>Directive Practice</title>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
</head>
<body ng-app="mePracticing">
<h1>HEADER</h1>
<div ng-controller="practiceController">
<practice-directive movie="movie" display="display(movie)" rating="{{rating}}"></practice-directive>
</div>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.6/angular.min.js"></script>
<script src="app.js"></script>
<script src="myDirective.js"></script>
</body>
</html>
app.js只是我创建模块的一行:
angular.module('mePracticing', []);
如果有人能给我任何关于为什么'&amp;'的提示不工作我真的很感激。谢谢!
编辑:我为它制作了一个JSFiddle:https://jsfiddle.net/hozxz5n4/
答案 0 :(得分:2)
这是因为当你使用指令时没有一个名为“display”的函数时,你需要传递声明的函数:
<practice-directive movie="movie" display="displayMovie(movie)" rating="{{rating}}"></practice-directive>
最后在指令中调用display prop function:
(function() {
'use strict';
angular
.module('mePracticing')
.directive('practiceDirective', practiceDirective);
function practiceDirective() {
var directive = {
restrict: 'AE',
scope: {
movie: '=',
rating: '@',
display: '&'
},
template: '<div>Movie: {{movie}}</div>' +
"Enter a movie: <input type ='text' ng-model='movie'>" +
"<div>Rating: {{rating}}</div>" +
"<div><button ng-click='display()'>CLICK ME</button></div>"
};
return directive;
}
})();
答案 1 :(得分:1)
该指令有自己独立的范围,因此displayMovie()
中引入的practiceController
函数永远不会被调用。将函数移动到您的指令,如下所示:
function practiceDirective() {
var directive = {
restrict: 'AE',
scope: {
movie: '=',
rating: '@',
display: '&'
},
link: function(scope, element, attrs) {
scope.displayMovie = function(movie) {
alert("Movie :" + movie);
}
},
template: '<div>Movie: {{movie}}</div>' +
"Enter a movie: <input type ='text' ng-model='movie'>" +
"<div>Rating: {{rating}}</div>" +
"<div><button ng-click='displayMovie(movie)'>CLICK ME</button></div>"
};
return directive;
}
工作小提琴: https://jsfiddle.net/hozxz5n4/1/
另请查看this great answer。