我可以在 angular 的每个控制器中提供一个功能吗? [英] Can I make a function available in every controller in angular?
问题描述
如果我有一个实用函数 foo，我希望能够从我的 ng-app 声明中的任何地方调用它.有什么办法可以让它在我的模块设置中全局访问，还是需要将它添加到每个控制器的范围内?
If I have a utility function foo that I want to be able to call from anywhere inside of my ng-app declaration. Is there someway I can make it globally accessible in my module setup or do I need to add it to the scope in every controller?
推荐答案
您基本上有两个选择，要么将其定义为服务，要么将其放置在您的根范围内.我建议你用它做一个服务，以避免污染根范围.您创建一个服务并使其在您的控制器中可用，如下所示:
You basically have two options, either define it as a service, or place it on your root scope. I would suggest that you make a service out of it to avoid polluting the root scope. You create a service and make it available in your controller like this:
<!doctype html>
<html ng-app="myApp">
<head>
<script src="http://code.jquery.com/jquery-1.9.1.min.js"></script>
<script src="http://code.angularjs.org/1.1.2/angular.min.js"></script>
<script type="text/javascript">
var myApp = angular.module('myApp', []);
myApp.factory('myService', function() {
return {
foo: function() {
alert("I'm foo!");
}
};
});
myApp.controller('MainCtrl', ['$scope', 'myService', function($scope, myService) {
$scope.callFoo = function() {
myService.foo();
}
}]);
</script>
</head>
<body ng-controller="MainCtrl">
<button ng-click="callFoo()">Call foo</button>
</body>
</html>
如果这不是您的选择，您可以像这样将其添加到根范围:
If that's not an option for you, you can add it to the root scope like this:
<!doctype html>
<html ng-app="myApp">
<head>
<script src="http://code.jquery.com/jquery-1.9.1.min.js"></script>
<script src="http://code.angularjs.org/1.1.2/angular.min.js"></script>
<script type="text/javascript">
var myApp = angular.module('myApp', []);
myApp.run(function($rootScope) {
$rootScope.globalFoo = function() {
alert("I'm global foo!");
};
});
myApp.controller('MainCtrl', ['$scope', function($scope){
}]);
</script>
</head>
<body ng-controller="MainCtrl">
<button ng-click="globalFoo()">Call global foo</button>
</body>
</html>
这样，您的所有模板都可以调用 globalFoo()，而无需将其从控制器传递给模板.
That way, all of your templates can call globalFoo() without having to pass it to the template from the controller.
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