This article is an introduction to the angularjs controller, an analysis of usage examples of the angularjs controller, and there are also application methods for the angularjs controller. Let’s take a look at this article together
AngularJS Controller
## AngularJS Controller Control data for AngularJS applications. AngularJS controllers are regular JavaScript objects.
AngularJS applications are controlled by controllers. The
ng-controller directive defines an application controller.
Controllers are JavaScript objects created by the standard JavaScript object constructor.
AngularJS Example
<p ng-app="myApp" ng-controller="myCtrl">
名: <input type="text" ng-model="firstName"><br>
姓: <input type="text" ng-model="lastName"><br>
<br>
姓名: {{firstName + " " + lastName}}
</p>
<script>
var app = angular.module('myApp', []);
app.controller('myCtrl', function($scope) {
$scope.firstName = "John";
$scope.lastName = "Doe";
});
</script>
尝试一下 »
AngularJS 应用程序由 ng-app 定义。应用程序在 <p> 内运行。
ng-controller="myCtrl" 属性是一个 AngularJS 指令。用于定义一个控制器。
myCtrl 函数是一个 JavaScript 函数。
AngularJS 使用$scope 对象来调用控制器。
在 AngularJS 中, $scope 是一个应用象(属于应用变量和函数)。
控制器的 $scope (相当于作用域、控制范围)用来保存AngularJS Model(模型)的对象。
控制器在作用域中创建了两个属性 (firstName 和 lastName)。
ng-model 指令绑定输入域到控制器的属性(firstName 和 lastName)。
控制器方法
上面的实例演示了一个带有 lastName 和 firstName 这两个属性的控制器对象。
控制器也可以有方法(变量和函数):
AngularJS 实例
<p ng-app="myApp" ng-controller="personCtrl">
名: <input type="text" ng-model="firstName"><br>
姓: <input type="text" ng-model="lastName"><br>
<br>
姓名: {{fullName()}}
</p>
<script>
var app = angular.module('myApp', []);
app.controller('personCtrl', function($scope) {
$scope.firstName = "John";
$scope.lastName = "Doe";
$scope.fullName = function() {
return $scope.firstName + " " + $scope.lastName;
}
});
</script>
尝试一下 »
外部文件中的控制器
在大型的应用程序中,通常是把控制器存储在外部文件中。
只需要把 <script> 标签中的代码复制到名为 personController.js 的外部文件中即可:
AngularJS 实例
<p ng-app="myApp" ng-controller="personCtrl">
First Name: <input type="text" ng-model="firstName"><br>
Last Name: <input type="text" ng-model="lastName"><br>
<br>
Full Name: {{firstName + " " + lastName}}
</p>
<script src="personController.js"></script>
尝试一下 »
其他实例
以下实例创建一个新的控制器文件:
angular.module('myApp', []).controller('namesCtrl', function($scope) {
$scope.names = [
{name:'Jani',country:'Norway'},
{name:'Hege',country:'Sweden'},
{name:'Kai',country:'Denmark'}
];
});
保存文件为 namesController.js:
然后,在应用中使用控制器文件:
<p ng-app="myApp" ng-controller="namesCtrl">
<ul>
<li ng-repeat="x in names">
{{ x.name + ', ' + x.country }}
</li>
</ul>
</p>
<script src="namesController.js"></script>
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